Here is a video showing the replacement of the fuel pump on the AquaHot hydronic heating unit in our motorhome. The fuel pump is manufactured by Webasto. Enjoy!
Your videos are the gift that keeps on giving. Used your videos on rebuilding my burner before and again troubleshooting my leaking fuel. My case it is the solenoid sticking. Fantastic information!! Thank you!!!
I have a 2004 Monaco Dynasty and need to build the Webasco blower motor. You did a great job breaking down the details. I will be calling Aqua Hot on Monday to order a rebuild kit.
FINALLY! A video that shows how to set the electrode gap. NOW...How about a video that shows how to test the electric functions of the burner without removing the unit from the vehicle. BTW...Great video.
Excellent step by step maintenance/rebuild procedures for the Wabasto diesel hot water heater/furnace. Brilliant commentary complete with torque settings for the nuts and bolts! Great insight for this system, Mike. Thanks so much for posting this video.
Very thorough ..I think I could follow these steps should we need to rebuild our Aquahot unit. I'm experiencing a lot of the same symptoms you described so odds are it's in need of an overhaul. That you for the detailed instructions and sources for parts etc.
I have been watching all your Aqua hot videos and you are very informative and very thorough on your explanation of maintenance and repairing the Aqua hot system. There are not many people available to speak with regarding diagnosis on this system . Thank you for putting this up on You tube as it will help may of us performing maintenance and repairs on our aqua hot systems.
Thank you !! I appreciate the time you took to do the video. Everything that can go wrong did on my AquaHot. I now have to replace my fuel pump. Thanks again.
Thanks for the time you put into this. AquaHots are intimidating to work on! If it wasn't for video's like this and Roger's website a lot of us would be out of luck. Thanks!
Thank you for your comments and thank you for watching. I hope if was helpful. They can be intimidating but just remember they are merely several components working together. They are not too awfully difficult to work on, the difficulty comes when troubleshooting and determining which of the components is failing or not contributing. Mike.
This has to be hands down the best instructional video for these systems that exists out there. I looked on his web site to get a pump for my Hydro-Hot and it doesn’t list one…so sad. But at least I now know what is wrong with it. It’s a love hate relationship I have with my Hydro-Hot. Nothing but trouble with it since buying our Country Coach. When it works…it’s great. The other 6 days a week I hate it. Thanks for the awesome video.
Thank you. I had a few issues with our Aqua-Hot when we bought our Monaco Dynasty back in 2007 and I became hell bent on learning and understanding the system. I'm glad the video was informative. Thanks for watching and I appreciate the comments. Mike
Thank you for asking. I’m doing well as I hope you are also. Sorry for the lack of videos lately but much of what I’ve been busy with is plain ole’ run of the mill tasks and nothing special. I hope to have a couple projects to record in the near future. Thank you fir following along and I appreciate the comments. Mike
Hello Mike, This will be the first time that I have service my Hydro-Hot myself. Your video really taught me a lot. I bought an instruction book on how to do this, but would not have been able to do it solely from the service manual had it not been for you. Question: Do you know what mixture - water to antifreeze that you are suppose to add to the antifreeze reservoir?
Thanks for the kind words Randy and thank you for watching. I’m glad the video was helpful. As for the glycol mixture it is 50/50 with distilled water. Be certain to use the correct glycol and distilled water to eliminate deposit buildup in your system. I’ve been using boiler glycol marketed by Camco which is readily available. Mike
Thank God for you. My bearings went and all hell broke loose. Ordered all the parts and never did anything like this before - but like you I’m a mechanic. Thanks for the video. I have a question about the coil - do you know much about replacing that?
Are you referring to the coil on the fuel solenoid or the igniter coil? I have replaced both on various coaches. Thanks for watching and I am glad it was helpful. Mike
The domestic coil is not a serviceable component. Depending on the model year of your actual Aqua-Hot unit will determine the style of the domestic loop. Approx 2002 model year units and older have the domestic hot water coil wrapped around the outside of the boiler tank and held on or secured to the boiler tank by means of a conductive paste that when dry not only holds the loop in place but also aids in conducting heat from the boiler tank to the copper domestic line. On approx 2003/2004 model year Aqua-Hot unit’s and newer, the domestic loop is actually located inside of the boiler tank which has the heated glycol surrounding it which transfers the heat from the glycol through the tubing which heats the water. Either way if your unit has a failed domestic line or coil it will require replacement with a new or remanufactured unit. I hope that is what you were asking. Mike
Mike, do you know the difference between Hydro nd Aqua Hot - did two companies merge? There are many different models and only one annual service kit... safe to assume same nozzle and fuel filter? My model is not listed HHU-500-09M has a man date of Jan 2013. All your knowledge and ability is amazing!
Thank you for the kind words. As far as the differences, they both are diesel fired units which provide interior heating as well as domestic hot water. The Hydro-Hot is referred to as the little brother to the Aqua-Hot due to physical size for one as the Hydro-Jot was designed to fit similar to a 10-gallon water heater whereas the Aqua-Hot is large enough to take up most of a half bay. The Aqua-Hot will provide interior heating and domestic water on demand at full volume whereas the Hydro-Hot will drop out heating function when the heating of the domestic water is too demanding. I hope all that makes sense but they are very similar yet different. Thanks again for watching and I hope you find the content helpful. Mike
Thanks for the video…. Just a quick question…… to replace my fuel solenoid, I must pull the whole housing out, right?!? Or is it possible to replace the whole fuel solenoid by swinging the head open and do it from the side?!? I’d appreciate any advice. Thx.
It can be done by swinging the whole burner assembly away from the combustion chamber, but it is so much easier with it completely removed. Plus less chance of damaging wiring or a connection. Thanks for watching. Mike
Hi Mike , Thank you for your Video, I too have the Aqua Hot. How many hours is on your Aqua Hot? I have about 1100 hrs on mine and I just serviced mine with Filter and Orifice.
Thanks for sharing man! I went through a training on these systems and they mentioned to put the shims and bearings (inside air chamber) in exact order. I saw your bearings still on the table while you were almost done? so did you actually replaced them or is it running without them? thanks again!
Viliam Palček I installed new bearings. My fear was from the fuel pump leaking it had washed the lubricant out of the bearings and even though they felt fine, I didn't want to risk it for the price of a couple bearings. Thanks for watching and I'm glad you found it helpful. Mike.
I just bought a tiffin phaeton 2015 with aqua hot in it Our friends has 1 also and have had problems with theirs They just got back from red bay al. Having it rebuilt $!!! $
Congrats on the new coach. Tiffin makes a fine coach. Even with the few issues I’ve had with my Aqua-Hot, I would never have another coach without it. Personally I’m not as impressed with the newer AH units the more I’m around them which is why I’ll keep my old coach with the older model AH. Thanks again for watching. Mike
No. I think it is only available as an assembly. All other parts such as bearings, banjo fittings, fuel lines, etc. must be purchased individually as well as they used no "kit" that I am aware of. Thanks for watching. Mike
Mike Thanks for another great video. I over tightened my casting blower and broke a the ear off! Is it possible to repair it with JB Weld or have someone weld it? I also chipped some of insulation off the electric igniter when removing the fuel nozzle.
Mike thanks again...how do you change the electrodes I chipped the ceramic around one of them? Also what about securing the housing by using the other places for bolts as opposed to the j-bolts?
You could try using one of the other bosses but I haven’t had to do that so I can’t tell you for certain if it will work or not. As for the electrodes, they remove as the pair and connect to the coil on the outside of the unit. Then use the gauge secured to the outside of the case as the means of setting the correct gap. Mike
Thanks for the info, can you tell us how and when to change the fluids in the Aqua Hot? I don't think it's suppose to be a whiskey colored fluid! So I am wondering if the fluid needs replaced in the system.
The only fluid to speak of is the glycol which flows from the boiler tank to each of the heat registers. It is a closed system so unless someone has introduced a fluid other than the approved fluid it should last quite a few years. Ours continues to be a nice pink color and I changed it once after purchasing the coach because the unit had a leak. I did not know what the previous owner had put in it so I flushed it out and added the correct fluid. If yours appears to be contaminated I would drain and refill with fresh glycol. Mike.
GREAT video Mike. I took my 08 Tiffin to Red Bay. The service center drained my glycol, flushed the system using water, a couple 5 gallon buckets and circulation pump then refilled with nice pink glycol. A few days later (staying in the coach at night) I reported that the AH didn't seem to be working correctly. In a regular service bay they found a circulation pump not working. While replacing it, you could see that the pretty pink glycol had already turned brown. Must be a secret to getting all the registers flushed or the "quick bay" guys hadn't learned the flush procedure yet.
+mtinaustin thanks for the comments. Sorry you have issues getting all of the glycol removed. That was a lot of wasted time for them going completely through that process and then having to go back and do it again. When I did mine I pulled a vacuum then opened drain multiple times before the full and drain cycles. I think it helped to get the glycol away from the registers and into the main tank so it could be expelled from the system. Thanks again for watching and commenting. Mike
Mike, I love your videos, I recently bought a 2004 Beaver and I am having issues with the Aqua hot. I have done the filter and nozzle and adjusted the igniters. I am still having issues. I would like to talk to you if possible. I live in northern Utah and I don't think I am far from your shop. Let me know if contacting you is possible. Thanks
Gary, I think you can send me an email message through TH-cam when logged on. Shoot me a message there and I will reply with contact information. Thanks. Mike
Hey Mike, Sorry, I looked all over and can't see where or how to email you. My email is utahrzr4@gmail.com if you could email me your info I will give you a call Thanks
+James Lockwood sorry no video on stir pump replacement. They are not difficult to replace just be sure to bleed properly or the pump will not circulate the glycol. Mike
That doesn't sound good. I would recommend a drain and refill and get all of that nasty stuff out of there. Not only could it contaminate the system, but it will also adversely effect the fluids ability to transfer heat which could have a negative effect on how well the system works in general. Mike.
Thanks again Mike. One more question how much fluid does the system take? I have gone to Roger Berkes forum as well and he did mention that the camcoa fluid is known to turn brownish but as far as changing the fluid no concise information. One good thing, my 08 Camelot has much easier access than your!
+Karen Studer There really is no "set" amount. They vary from coach to coach because of the length of PEX, amount of heat registers and such. I can't remember off the top of my head how much my system holds. Mike.
It would be helpful if in the future you position the camera better. In this video at about 8 minutes in we get a great view of your hands but not of what you are working on.
Sorry. Space was limited so my son was holding the camera over my shoulder. I’m still learning to work around a camera. I’m used to just working and getting shit done without talking to a camera. I’ll try to do a better job. Thanks for watching. Mike
Your videos are the gift that keeps on giving. Used your videos on rebuilding my burner before and again troubleshooting my leaking fuel. My case it is the solenoid sticking. Fantastic information!! Thank you!!!
Glad to hear the videos are helpful. Thank you for taking the time to watch and especially for the comments.
Mike
I have a 2004 Monaco Dynasty and need to build the Webasco blower motor. You did a great job breaking down the details. I will be calling Aqua Hot on Monday to order a rebuild kit.
Glad it was helpful. Thanks for watching and for the comments.
Mike
FINALLY! A video that shows how to set the electrode gap.
NOW...How about a video that shows how to test the electric functions of the burner without removing the unit from the vehicle. BTW...Great video.
Excellent step by step maintenance/rebuild procedures for the Wabasto diesel hot water heater/furnace. Brilliant commentary complete with torque settings for the nuts and bolts! Great insight for this system, Mike. Thanks so much for posting this video.
Thank you for this video! I was pretty sure I could pull this off, but having a step by step walk through, makes me absolutely certain. Thanks again.
Happy the video was helpful. Thanks for watching.
Mike
Excellent information and very informative for those of us who are just starting out with our first aqua hot!!
Thank you. Happy to hear you found it informative.
Thanks for watching.
Mike
Very thorough ..I think I could follow these steps should we need to rebuild our Aquahot unit. I'm experiencing a lot of the same symptoms you described so odds are it's in need of an overhaul. That you for the detailed instructions and sources for parts etc.
Hans Keller I'm glad it was helpful and thanks for watching.
Mike.
I have been watching all your Aqua hot videos and you are very informative and very thorough on your explanation of maintenance and repairing the Aqua hot system. There are not many people available to speak with regarding diagnosis on this system . Thank you for putting this up on You tube as it will help may of us performing maintenance and repairs on our aqua hot systems.
Thank you for watching and especially for the kind words. I am glad to hear the videos are helpful.
Mike
Trying to learn what I can about them . Thanks for the video I'm sure it will help in the future.
You’re welcome.
Mike
Thank you !! I appreciate the time you took to do the video. Everything that can go wrong did on my AquaHot. I now have to replace my fuel pump. Thanks again.
You’re welcome. Glad it was helpful.
Thanks for watching and for taking the time to comment.
Mike
Thanks for the time you put into this. AquaHots are intimidating to work on! If it wasn't for video's like this and Roger's website a lot of us would be out of luck. Thanks!
Thank you for your comments and thank you for watching. I hope if was helpful. They can be intimidating but just remember they are merely several components working together. They are not too awfully difficult to work on, the difficulty comes when troubleshooting and determining which of the components is failing or not contributing.
Mike.
Great great video, I have a 2004 Monoco Dynasty and will be doing my annual maintenance with a wealth of knowledge. Thanks again!!
+Ronny Briggs thank you. I appreciate the comments and thanks for watching.
Mike
This has to be hands down the best instructional video for these systems that exists out there. I looked on his web site to get a pump for my Hydro-Hot and it doesn’t list one…so sad. But at least I now know what is wrong with it. It’s a love hate relationship I have with my Hydro-Hot. Nothing but trouble with it since buying our Country Coach. When it works…it’s great. The other 6 days a week I hate it. Thanks for the awesome video.
Thank you. I had a few issues with our Aqua-Hot when we bought our Monaco Dynasty back in 2007 and I became hell bent on learning and understanding the system. I'm glad the video was informative.
Thanks for watching and I appreciate the comments.
Mike
Wow, outstanding work. Thanks for sharing your expertise.
Thank you for the comments and taking the time to watch. I hope it was helpful.
Mike
Excellent video thank you very thorough and informative
Glad it was helpful. Thank you for taking the time to watch and comment.
Mike
Great Video. Very detailed information.
Thank you. I hope it was helpful.
Mike
Thanks for the video very helpful
Glad it was helpful. Thanks for the comments and for taking the time to watch.
Mike
Perfect job🙏👍😉
Awesome work thanks
Thank you for the comment and thanks for taking the time to watch.
Mike
Great video
Thank you and thanks for watching.
Mike
Hopefully your doing well
I haven't seen any new videos lately 😕
Thanks for sharing 👍
Thank you for asking. I’m doing well as I hope you are also.
Sorry for the lack of videos lately but much of what I’ve been busy with is plain ole’ run of the mill tasks and nothing special. I hope to have a couple projects to record in the near future.
Thank you fir following along and I appreciate the comments.
Mike
Roger has rebuilt my Burner motor 2 times now.
Thanks Mike
Great job!
Thank you.
Mike
thanks so much for the help
You are very welcome. Glad it was helpful. Thanks for watching.
Mike
Hello Mike, This will be the first time that I have service my Hydro-Hot myself. Your video really taught me a lot. I bought an instruction book on how to do this, but would not have been able to do it solely from the service manual had it not been for you. Question: Do you know what mixture - water to antifreeze that you are suppose to add to the antifreeze reservoir?
Thanks for the kind words Randy and thank you for watching. I’m glad the video was helpful.
As for the glycol mixture it is 50/50 with distilled water. Be certain to use the correct glycol and distilled water to eliminate deposit buildup in your system. I’ve been using boiler glycol marketed by Camco which is readily available.
Mike
Thanks so much , just what I needed,
Glad it was helpful. Thanks for watching.
Mike
@@zmotorsports62 can I get a Link to Rogers hydro hot repair parts thanks Joe
rvhydronicheaterrepair.com/
Thank God for you. My bearings went and all hell broke loose. Ordered all the parts and never did anything like this before - but like you I’m a mechanic. Thanks for the video. I have a question about the coil - do you know much about replacing that?
Are you referring to the coil on the fuel solenoid or the igniter coil? I have replaced both on various coaches.
Thanks for watching and I am glad it was helpful.
Mike
zmotorsports the coil which the water passes through to return hot water into the coach...
The domestic coil is not a serviceable component. Depending on the model year of your actual Aqua-Hot unit will determine the style of the domestic loop. Approx 2002 model year units and older have the domestic hot water coil wrapped around the outside of the boiler tank and held on or secured to the boiler tank by means of a conductive paste that when dry not only holds the loop in place but also aids in conducting heat from the boiler tank to the copper domestic line.
On approx 2003/2004 model year Aqua-Hot unit’s and newer, the domestic loop is actually located inside of the boiler tank which has the heated glycol surrounding it which transfers the heat from the glycol through the tubing which heats the water.
Either way if your unit has a failed domestic line or coil it will require replacement with a new or remanufactured unit.
I hope that is what you were asking.
Mike
Very good video thanks
Thank you for watching and for the comment.
Mike
Mike, do you know the difference between Hydro nd Aqua Hot - did two companies merge? There are many different models and only one annual service kit... safe to assume same nozzle and fuel filter? My model is not listed HHU-500-09M has a man date of Jan 2013. All your knowledge and ability is amazing!
Thank you for the kind words.
As far as the differences, they both are diesel fired units which provide interior heating as well as domestic hot water. The Hydro-Hot is referred to as the little brother to the Aqua-Hot due to physical size for one as the Hydro-Jot was designed to fit similar to a 10-gallon water heater whereas the Aqua-Hot is large enough to take up most of a half bay.
The Aqua-Hot will provide interior heating and domestic water on demand at full volume whereas the Hydro-Hot will drop out heating function when the heating of the domestic water is too demanding.
I hope all that makes sense but they are very similar yet different.
Thanks again for watching and I hope you find the content helpful.
Mike
Thanks for the video…. Just a quick question…… to replace my fuel solenoid, I must pull the whole housing out, right?!? Or is it possible to replace the whole fuel solenoid by swinging the head open and do it from the side?!? I’d appreciate any advice. Thx.
It can be done by swinging the whole burner assembly away from the combustion chamber, but it is so much easier with it completely removed. Plus less chance of damaging wiring or a connection.
Thanks for watching.
Mike
Hi Mike , Thank you for your Video, I too have the Aqua Hot. How many hours is on your Aqua Hot? I have about 1100 hrs on mine and I just serviced mine with Filter and Orifice.
Thanks for sharing man! I went through a training on these systems and they mentioned to put the shims and bearings (inside air chamber) in exact order. I saw your bearings still on the table while you were almost done? so did you actually replaced them or is it running without them? thanks again!
Viliam Palček I installed new bearings. My fear was from the fuel pump leaking it had washed the lubricant out of the bearings and even though they felt fine, I didn't want to risk it for the price of a couple bearings.
Thanks for watching and I'm glad you found it helpful.
Mike.
Who is this roger guy. And how to I contact him
Roger Berke us the Aqua Hot guru. His website is rvhydronicheaterrepair.com.
I just bought a tiffin phaeton 2015 with aqua hot in it
Our friends has 1 also and have had problems with theirs
They just got back from red bay al. Having it rebuilt $!!! $
Congrats on the new coach. Tiffin makes a fine coach. Even with the few issues I’ve had with my Aqua-Hot, I would never have another coach without it. Personally I’m not as impressed with the newer AH units the more I’m around them which is why I’ll keep my old coach with the older model AH.
Thanks again for watching.
Mike
Do they sell a rebuild kit for the fuel pump?
No. I think it is only available as an assembly. All other parts such as bearings, banjo fittings, fuel lines, etc. must be purchased individually as well as they used no "kit" that I am aware of.
Thanks for watching.
Mike
Mike Thanks for another great video. I over tightened my casting blower and broke a the ear off! Is it possible to repair it with JB Weld or have someone weld it? I also chipped some of insulation off the electric igniter when removing the fuel nozzle.
You could try repairing it but I would be doubtful it would hold sufficiently enough.
Thanks for watching and I’m glad it was helpful.
Mike
Mike thanks again...how do you change the electrodes I chipped the ceramic around one of them? Also what about securing the housing by using the other places for bolts as opposed to the j-bolts?
You could try using one of the other bosses but I haven’t had to do that so I can’t tell you for certain if it will work or not.
As for the electrodes, they remove as the pair and connect to the coil on the outside of the unit. Then use the gauge secured to the outside of the case as the means of setting the correct gap.
Mike
Mine is leaking fuel out the bottom of the unit.
Thanks for the info, can you tell us how and when to change the fluids in the Aqua Hot? I don't think it's suppose to be a whiskey colored fluid! So I am wondering if the fluid needs replaced in the system.
The only fluid to speak of is the glycol which flows from the boiler tank to each of the heat registers. It is a closed system so unless someone has introduced a fluid other than the approved fluid it should last quite a few years. Ours continues to be a nice pink color and I changed it once after purchasing the coach because the unit had a leak. I did not know what the previous owner had put in it so I flushed it out and added the correct fluid. If yours appears to be contaminated I would drain and refill with fresh glycol.
Mike.
GREAT video Mike. I took my 08 Tiffin to Red Bay. The service center drained my glycol, flushed the system using water, a couple 5 gallon buckets and circulation pump then refilled with nice pink glycol. A few days later (staying in the coach at night) I reported that the AH didn't seem to be working correctly. In a regular service bay they found a circulation pump not working. While replacing it, you could see that the pretty pink glycol had already turned brown. Must be a secret to getting all the registers flushed or the "quick bay" guys hadn't learned the flush procedure yet.
+mtinaustin thanks for the comments. Sorry you have issues getting all of the glycol removed. That was a lot of wasted time for them going completely through that process and then having to go back and do it again.
When I did mine I pulled a vacuum then opened drain multiple times before the full and drain cycles. I think it helped to get the glycol away from the registers and into the main tank so it could be expelled from the system.
Thanks again for watching and commenting.
Mike
Mike, I love your videos, I recently bought a 2004 Beaver and I am having issues with the Aqua hot. I have done the filter and nozzle and adjusted the igniters. I am still having issues. I would like to talk to you if possible. I live in northern Utah and I don't think I am far from your shop. Let me know if contacting you is possible. Thanks
Gary, I think you can send me an email message through TH-cam when logged on. Shoot me a message there and I will reply with contact information.
Thanks.
Mike
Hey Mike, Sorry, I looked all over and can't see where or how to email you. My email is utahrzr4@gmail.com if you could email me your info I will give you a call
Thanks
WHATS THE BEST DEAL ON A FUEL GUAGE
Not sure what they're going for these days. I've had mine for quite a few years.
Thanks for watching.
Mike
I checked his website and he says he has retired.
I have been trying to find a video on replacing a stir pump. Do you have any help on this subject?
+James Lockwood sorry no video on stir pump replacement. They are not difficult to replace just be sure to bleed properly or the pump will not circulate the glycol.
Mike
well, its not yellow or pink and the overflow tank seems to have some sort of algi or mold in bottom...maybe we should just drain it and put fresh in.
That doesn't sound good. I would recommend a drain and refill and get all of that nasty stuff out of there. Not only could it contaminate the system, but it will also adversely effect the fluids ability to transfer heat which could have a negative effect on how well the system works in general.
Mike.
Thanks again Mike. One more question how much fluid does the system take? I have gone to Roger Berkes forum as well and he did mention that the camcoa fluid is known to turn brownish but as far as changing the fluid no concise information. One good thing, my 08 Camelot has much easier access than your!
+Karen Studer There really is no "set" amount. They vary from coach to coach because of the length of PEX, amount of heat registers and such. I can't remember off the top of my head how much my system holds.
Mike.
It would be helpful if in the future you position the camera better. In this video at about 8 minutes in we get a great view of your hands but not of what you are working on.
Sorry, space is quite limited and I was more concerned about not damaging any wiring or fasteners than the video at the time.
Mike
Why didn't you put camera in front of you
It would be alot more clear
Sorry. Space was limited so my son was holding the camera over my shoulder. I’m still learning to work around a camera. I’m used to just working and getting shit done without talking to a camera. I’ll try to do a better job.
Thanks for watching.
Mike
Suggestion, can you video from the top. many times all I see is the back of your hand.
I do like to wash your videos
How much was the pump?
I don’t recall. Seems like around $350. I purchased it online from Roger Burke’s site.
Mike
Great video, thanks
Thank you. Glad you liked it.
Mike