Viessmann Vitodens 100 No Hot water Boiler Service - Viessmann Boiler
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- เผยแพร่เมื่อ 8 ก.ย. 2024
- Combi Boiler - No Hot Water. Boiler Service. Viessmann Boiler. Cleaning a plate to plate heat exchanger. no hot water on a Viessmann Vitodens 100. This boiler is a 35 kilowatt boiler, so I'm going to go through some of the basic things to check. Also, this boiler, the water is fluctuating hot and cold. It goes up to temperature, so I'll show you that, and then I'll show you how to repair it as well.
First of all, let's have a quick look at the boiler. This is the Vitodens 100 WB1C, and it's a 35 kilowatt boiler. We would expect to get around 14 litres a minute from this at 35-degree rise. I haven't turned the power on yet on this, but obviously we'd check the power was on. That's the hot water selector. We would turn that up, make sure that's up onto full, and then we'll turn the boiler on. Then what I'm going to do, before we even take the case off, and before we look inside the boiler, we'll go run the hot water tap, and we'll check the flow rate just to make sure that it's not running too quick through the boiler. So we'll check that now.
The importance of checking this is if you've got too much flow going through the boiler, then the water will be cooler. It can only raise a temperature by 35 degrees, and that's at 14 litres per minute. We can see that clearly, it is about 14 litres a minute. We'll leave that running now, and then we'll go and have a look inside at the boiler temperature.
We've turned the hot water on now, and it's just going up to full. We would expect this normally to settle around 62 to maybe 67-ish, so maybe about 65 degrees we'd normally expect this to settle at. If it goes above that, then we would suspect it could have a problem with a plate heat exchanger, so we'll see what happens here now.
We can see it's going above what we'd expect it to be. This is getting a lot higher now than we would expect. This would indicate to me, or it would give me an idea that we've got a blocked or a partially blocked plate heat exchanger. Now what we'll do, we'll have a look inside, just where it's safe. This shuts off, but then we'll have a look inside and we'll strip it down. We'll take the plate heat exchanger out, we'll clean it out, and then we'll put it all back together. Then we'll do this again, and we'll see what difference we have. We can see that now the burner's just gone down. If we measured temperature of water now, we'd find that the hot water's probably not that hot because it's going on and off. It's going up to temperature, shutting off. You can hear it, it's gone down now. That's the reason for the problem with this boiler. Let's strip it down now, and we'll have a look.
As always, if you're going to take the combustion cover off a boiler, make sure you're gas safe registered, or get somebody who's gas safe registered to do it for you. You've got two screws under here. First of all, you turn the power off, and then we would do all our safety checks. We'd go under these two screws and then we'll just lift the cover off.
I've undone the screws below, and then the case just lifts off. As I say, this has got a seal on here, so you must be gas safe registered if you're going to work on this boiler. Let's have a look inside, and we'll have a closer look. If you want to get to the plate heat exchanger, just lift these flaps down. Then the plate heat exchanger is right at the back there. To make it easier, you're going to take the burner out. Now, this seems to say that it's been serviced 2017, which normally when people write stuff like this on, it means it's been fully stripped down. But when I look at the gas pipe here, I can see that it's still got the seal on there. So I would suspect that when we lift this out in a minute, this has never been serviced. We'll have a look, and we'll see. I've connected the pump onto this now. I'm just going to pump it out. There's no pressure on this at all. Obviously, it's never been checked ... well, it haven't because it was sealed. So I'm going to pump this up now. There's different calculations with this, depending on the system. I normally top them up the about one bar, so on that now, it's just over one bar. As I undo it off there, the pressure will drop a little bit.
I've just connected the expansion vessel back in now. As I said, very easy, just a nut up on top. One good thing about this boiler is everything is really easy to work on. Then the pipe, I've connected that pipe back on there, and then that just connects in. This just connects in back down there. You just push it in, and then you've got a little clip. Then that just clips in there, nice and easy.
Love your videos Allen, keep up the good work mate.
Thank you for your kind words.
a trick: you can watch series on flixzone. Been using it for watching lots of of movies lately.
@Reyansh Trey Yea, I have been using Flixzone} for years myself =)
Thank You Allen. Very useful information for future. I have been using the same boiler for four months and have had no problems yet.
Thanks Alan , I’m a newly qualified gas engineer and your videos have got me out of trouble many times
So just wanted to thank you for helping me fix our variable hot water upstairs. Downstairs was fine, but upstairs was variable. I cleaned the heat exchanger plate but also topped up the expansion vessel and all is fine now. After her initial doubt (when I flooded the kitchen because I hadn't fully drained it) I now have a happy wife! :)
Glad I could help!
Thank you, that is amazing teaching, step by step ❤
I have this boiler, this video has been a real eye opener. I had issues with my plate heater fouling up, the installer blamed the rubber pipes, a known issue by all accounts, he cleaned it out and performance was much better. I have since had the boiler serviced regularly by a different company and they do not carry it out as thoroughly as this. I’ll be showing them this video.
I came here as I wanted to learn how to wire a Nest thermostat, which until I get the boiler serviced is pointless installing.
I’m not gas safe so won’t be undertaking any of this myself, even though it looked straight forward.
If the system is clean then they do not normally sludged up. 👍
Thanks Allen for sharing your professional experiences in this video, managed to pluck up the courage to tackle the plate heat exchanger on my vitodens 100, got to say being a competent person you made this job basic enough for me, saved me money and got my boiler back up and running!! Showing you channel support and thanks very much well put together video...
That was well worth watching. Always been fascinated by these systems,look forward to the engineer giving the boiler its annual service.
Thanks for videos. Saved me a lot of work and money. Went straight to the fault. Heat exchanger out. Cleaned, de scaled, re fitted. 3 hours later. Hot water again.
Had loads of these year mostly with 050. Some I've managed to clean others I have just straight up replaced just to save a return visit. 050 has very small fins so much hard I have found to clean. Good video l, and great pro
great video, very informative. I'd like to see more along this format. Fault finding, diagnosis and service. 👍
Apprenticeonfire Thanks
Nice to see service technicians actually using the Viessmann cleaning tool and the service kit!
I doubt a bit of this shovel is really useful. He didn't use it. If use this wouldn't have such a nice new look. I use plastic to clean the main exchanger lot safer. ;)
Thank you Allen. That was a straight forward precise video❤
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Just had this problem on my boiler. It's heating to 102 but water is Luke warm then cuts out with f2 error code. Thanks to this video and others I have narrowed it down to diverter valve or heat exchanger. Saved me bundle! Thanks
Thanks Alan for all your help
Larry 25 Thanks
Thanks Allen. It was really helpful as I was going to do a service soon on this boiler and has the same problem. Cheers
Very good and educational. Thanks for your time
Excellent video very in-depth and very informative. Thank You
Stewart Bentham Thanks 👍
Another really useful video, Thankyou Allen for all your hard work on these.
Thanks Allen love your vids,you have found my problem with boiler, 👍👍👍
Good to hear
Thanks a lot Allen, Perfect video !!!!
Awesome, should help my 'I only fit Worcester' gas fitter no end. Thanks, and keep up the excellent service!
Excellent video mate. I did the same with a Worcester but only lasted temporary so had to change ultimately with a new Hex
I had one on a viessmann a while back that lasted 5 mins, i had to take heat exchanger out and flush it all. Thanks.
Nice Job Allan, looks like you fixed it.
Cheers Allan, i enjoyed that. Decent of you to take the time to make these Videos.
Thanks.
Excellent job as usual Allan. Thorough 👍
Paul Turner Thank You👍
Thanks for sharing Allen👍👍
Thanks.
foegot to add your instals are great to, a major factor is eying up prior to taking job on every detail hidden work and a lot of the time say on phone for a breakdown customer they tell youthe faults and on your drive to job u can save time by going to check main obvious faults right away althoughof course there has to be a full inspect repair and recommission of system , look forward to seeing more , i can subscribe if you send me details allen , thank you for making a great start to my day again mate ,
Thank you Allen. As always great video and explained well. Cheers
How great is it, that you have all those sample boilers! Great videos you made. Thanks a lot.
Good video Allan
Thank you.
Alan top draw mate I had a customer call me today with exact boiler describing same issues so did a little google and happy to see this come up. Obviously I shall diagnose properly when I go tomorrow but I’m sure this vlog will be of use👍🏻👍🏻
Interesting video; if that boiler was removed for the hot water fault then it goes to show the value in getting a heating engineer to take a look at it (And get the boiler serviced annually too!) Viesmann boilers a really good as they have a stainless steel inox heat exchanger, so should last a while longer than boilers with the cheaper aluminium heat exchangers. Once again Alan, a great informative video!
Thank you
Random musings , An interesting video to watch, but the thought in the back your mind is was this boiler removed just because of the hot water fault? so whole new boiler installation for such a small fault ?? unbelievable!
Salim Khan I am guessing that would be the case but not sure
Love the video! Very well explained and easy to understand
abdul hafiz Thanks
great video, thanks
Superb informative video as always, well done & thankyou
Paul Clive Thanks 👍
Informative Video Allan, thank you for making it.
super advice and diagnostics ..
Thank you for taking the time to watch my video.
Very informative video Allen 👍 keep up the good work.
Thank you
Nice video showing how it should be done Allen.
When I’m changing the plate heat exchanger I normally crack open the cold water inlet nut to let air in when the hot tap is open to let some more water out so less mopping up 👍obviously can only do this if your tap is lower than the boiler 😆
Love the videos keep them coming 👍
Thank you.
Brilliant video allen
Good video mate
thank you
great work allen , your mind must be on ob all the time , your knowledge on practical theory maintenance service worl and breakdown are 2nd to none , brilliant to watch , what do you do in your spare time allen ? ha ha ha i was an lpg fitter engineer , for calor gas covered whole of scotland . great job , doing commercial work industrial domestic and caravan sites covered everything , watching your self takes me back to my days when you just got on with job , in a hundred life time i couldnt have had a more satisfying job and experience over years no one can replace it , brilliant to watch your vids allen keep up great work 1st thing i do when i have a cuppa and shower in morning is put your vids on , im a dedicated fan brilliant mate ,
Thank you for detailed explanation
Very useful video ....this along with most of your others has gone straight into my saved vids ⭐️⭐️⭐️⭐️⭐️
You are the guru 🧙♂️
Just found your videos, great information Thanks👍
Cheers mate that was a really interesting video 👍
Thank You
Another excellent video Allen ! Thanks for uploading it I’ve fitted quite a few viessmann’s and also maintain quite a few you’ll be surprised how many I’ve ‘brought back from the dead ‘! which have been condemned, all due to lack of proper servicing many had still got the factory paint on the Schraeder valveOn expansion vessel where they have never been unscrewed or been topped up! I think it’s a state of the industry at the moment to be honest, I may be wrong? Whilst the burner assembly is out you also need to clean and check the gaps of the spark electrodes and after refitting the burner assembly the condensate trap will need to be washed out. this particular boiler you are servicing Has suffered neglect and has been ran on a dirty system, The dirt and debris in the Heat exchanger coils has caused the boiler to partially fill up with condensate water
I’ve seen it many times before through lack of servicing or proper servicing, shall we say?
if maintained and serviced well these are a very good boiler giving great reliable service and excellent efficiency
Salim Khan Thanks
Thank you very much very helpful keep up the good work
Love the video, I'm working on one tomorrow with more knowledge now, thanks Allen!
Thank you!
I have one of these so a big 👍 up
Very interesting to see how it all works (and how it breaks). I wish that I was gas safe so that I could have a tinker!
What's is a "tinker"?
@@olek735 Sorry, I should have been clearer and avoided the colloquialism. To "tinker" to me means to work with or on some device or machinery. Here in the UK you need to be qualified to work on boilers, and I am not!
Brilliant. Very informative.
Glad it was helpful!
Thank you friend😹👋👋👋
Interesting insight into the dark art of boiler servicing.
I hope the original owner wanted a new boiler ,and not the other option.
Slightly baffled by the air bleed being on the inside and the top up on the outside. I knew of a boiler that kept being topped up then it died of multiple component failure.
I do not know anything about the old owner or why it was replaced. Maybe they changed it as they were having issues with the hot water. Not really sure. Thanks.
Allen Hart why would you have a boiler on your wall with no idea of its history?
@@jamesjulian Because it's not on his wall, it's on a customer's wall.
no more It’s not on his wall it’s on the wall of his man cave these are boilers just to practice on and demonstrate to us
Great thanks for sharing 👍👍👍👍👍
Thanks for watching👍
Hi Allen very informative video, what chemical do you use to clean the plate FX2?
thank you for the very informative video where in alberta canada can a oerson get parts
Nice Allen I do same thing with heat exchanger but use white vinegar whilst having chin wag. If the boiler is on ground floor can you still drain through filling loop? Also I recommision vessels in situ helps with draining etc. I had one last week refilled it to 1 bar shot up so quickly and when heating was on it was so High but there wasn't actually any water inside boiler when I drained it I checked usual hose on expansion vessel but couldn't find blockage etc.
great video would recommend
thank you
great to c do u get time for work now u got man cave
Robin Wigley I am trying to do as little as possible these days. Although I have a full heating system to install next week. Thanks
Like always top class video ..very interesting and helpful will definitely help when going for my gas training ..
Any advice.or tips best way to complete the training ..
Thanks
mateusz Pasek Try and spend as much time as possible working with an engineer. 👍
Hi Allen
What is the name of the chemicals you use to de-scale
i normally use one shot but its not really advised anymore.
I wish viessmann had a dealer network here in Upstate NY
What boilers do you have over the pond?
Allen Hart Weil Mclain, peerless, lochinvar, HTP, Utica, mostly cast Iron units still in use. I installed a Buderus G115 with a riello burner last year and absolutely love it. Most homes have forced Air here but some have hot water baseboard with requires 180f degree water. Many people here that install High efficiency boilers are very unhappy because the do not see any gas savings because they don’t have the proper heat emitters. Am going to install an radiant slab in my new garage so I’m looking for the proper boiler for that. Keep up the good work Allen.
What should I check?
My unit gets the house up to temperature and it doesn’t come back on.
So I turn it off and put it back on and it does the same thing again.
Any idea please let me know thank you
Another great video Allen, however I have a question about servicing.
Would you recommend that servicing it is done based on time, ie once a year, or by usage? My Viesmann 100 is a couple of years old but It doesn't get a massive amount of use. I'm a single bloke living on my own, out working six days a week so not caning it like say a family of 4 running baths and showers and having the heating on all day long.
All the plant items where work get serviced based on how many hours usage rather than an arbitrary once a year.
Patrick Ahearne Manufactures recommendation is once a year 👍
Disconnecting the condensate pipe from bottom of heat exchanger when flushing out the debris (put a vessel under it obviously) would be a good trick .......ah Allan.
You could do it that way but i would rather do it with hose connected. then clean trap out at the end if needed.
Hi Alan, just a question, if there is no flame when the hot water is on , is it still the heat exchanger, there is heating just no hot water and the three port vale is moving in and out when you turn on the hot tap, hope you can answer the question for me cheers
Love your videos Alan keep up the good work!
My 30kw vitodens 100 has just developed this fault, its 1st fault after 6 years!
My gas engineer just changed the plate heat exchanger for new but since the replacement my hot water flow rate has reduced noticeably at all my outlets. I checked all the service valves and stop tap and everything is fully open. I’m having small problem getting him back due to lockdown shielding.Just wondered is it possible that he’s reduced the flow rate on the boiler somewhere of is it possible that the plate heat exchanger has been fitted wrong,in terms of the wrong way around or up side down? Interested to know your thoughts. All the best
Possibly a smaller plate to plate heat exchanger was fitted.
Hi Allen could you put up a link to the cake slice holder you cleaned the primary he-ex with? 😊
ghostmanromeo uk I got it from my Viessmann rep. Not sure who sells them. Sorry
@@AllenHart999 Viessmann sells them. I'm a US wholesaler we buy the exact same ones from Viessmann
Hi Allen, thanks for putting up informative videos!
I had a Vitodens 100 WB1A installed 10 years ago. Overall I'm happy with it. The first heating company didn't install low loss header. This reduces efficiency I was told by current authorized rep. It is cleaned and maintained yearly. However, the boiler locked out reporting F3 code a number of times. Technician determined that spark generator needed replacement. Boiler worked well for two years afterwards. Now the boiler puts out F3 code again. After last maintenance visit, the fan (or something) made loud humming noise during startup. The noise reduced once the boiler was full on. Everything was working fine otherwise. Had the technician back. He heard it too but couldn't determine the cause. I didn't want him to just replace whatever (motor or fan) making that noise.
Allen you know these boilers well. I would like to get your feedback on some items. 1/. How durable are these boilers? 2/. How often spark generator needs replacement? 3/. Love to have a hot water combi version but I'm worried about having issues without hot water and heat. How reliable is the combi type? 3/. My boiler is 10 years old. Should I continue to have it serviced or have it replaced?
Would greatly appreciate your opinion.
Thanks.
Mark.
Hi Alan,
Which cleaner chemical did you use to clean the hot water plate heat exchanger . I have a similar symptoms on my potterton Promax 28He I do get hot water, but sometimes for about 10 seconds water gets cooler and then it gets hot again, this happens now and again, not always. I would say intermittent not always. I suspected heat exchanger may be partial blocked or the boiler may be operating like this from new. The boilers is 3 years old.
A lot of people use one shot.
@@AllenHart999 hi Alan ur video are amazing just i just bought a new property my heating work ok but my hot water warm for a bit and then goes to cold can u pls tall me what problem that might be. .thank you very much
@@MohammedAli-rh5ii NTC sensor, pcb, flame sensing electrodes. Blocked plate to plate. It's best to call in a gas safe engineer. It's hard to diagnose without being there.
my dad worked for viessmann for 8 years and had the tools but where is the screwdriver from
Can you tell me what resistance I should expect from the seson next to the burner bleeder? Its a high thermostat. It has the 47 numer on the wire plug.
Does the door seal need to be replaced every time it comes apart and does it need to come apart ever year as the Worcester boilers only come apart when they fail the pressure test but a change the red burner seal every 4 years i only work mainly on the Worcester boilers as thats what i install and repair which keeps me more than busy with all my other jobs
Great video. My stopped working yesterday display showing 99 degrees no hot water or heating and the burner symbol doesn't come on, any ideas what that may be ?
Thanks for the video Alan. Very interesting to see how it all works.
How would you go about fixing a boiler that the flow of water in is too fast, causing a no hot water issue in a shower?
Set the boiler up correctly. Reduce the flow to match the boiler. Thanks
I have the veissman 050 , the hot water flow is very slow , but its constant temperature , . no one can seem to figure out whats happening ! ..any ideas ?
I’ve got 1 that’s doing the same boiler keep cutting out and temps are getting up to 82
👍👍👍
Does anyone know how to fix an F9 fault on a 12 yr old model. I’ve pressed the flashing reset button and it goes back to show the temp again but after about a minute it goes back to the F9 fault and the reset button flashes red again
Hello Allen, I am in a similar situation. When I turn on the hot water, it doesn't come out very hot. When the boiler reaches 60 degrees, it stops and does not turn on again until it reaches 25 degrees. The dial is at number 6. I have cleaned the exchanger, I have also cleaned the coil and finally checked and set the expansion vessel to 1 bar. Do you have any idea what it could be? I suspect that the sensor that measures the temperature is measuring more temperature than the real one.
For the novices how do they know which way up for the plate heat exchanger?
I would always advise to go on a manufacture training course. Thanks.
Hi Alan what cleaner did you put in the heat exchange unit
Cheers
Hi Alan. What is the problem if pressure guage drops down when boiler is running and does not increase above the standing pressure? Great videos.
Could you put details of that heat exchanger tool in the description please mate !
I got it from my rep.
@@AllenHart999 Thanks Allen I've been a worcester installer for about 10 years but recently I've found out that they are a large share holder of boxt so my loyalty as completely gone and I'm not keen on the idea of promoting worcester anymore....i was thinking of switching over to viessmann instead, do you think that would be a good move for my business? Many thanks Dan.
Hiya Alan, does this boiler have a drain off point if you don't have a magnetic filter to drain from, I'm gas safe registered but never worked on this boiler b4?? Thanks bud 👍
Yes you use the filling loop. Thanks.
I have this boiler. I have a leak from condensing trap. Can you do a video on condensing trap removal please?
Thenks you
When I use the kitchen tap while the hot and cold water is running, the water would turn freezing cold. When I shut the cold water and only the hot water is open it would still be freezing cold for like a minute or so then it would go back to normal but the same thing would happen over and over again. Can you tell me why this is happening and what I could do about it please?
Would anyone know what size hose is being used, which is attached to the bleed valve to clean the heat exchanger?
Allen can you show how the condence trap comes out to clean
You must be real cosy in that mancave
Michael Barron Love my man cave now 😂😂😂
Viesmann bar us at 1 when I switch it on it goes up to 3 bar how do I de pressurise it
Hi Allen have you came across the F4 fault on these boilers
Peter sutton Yes, normally needs a strip down service, it could also be other things as well, blocked condensate, lack of flame. Electrodes etc etc
I have done this video. Hope that helps. th-cam.com/video/va2n9UWW_QA/w-d-xo.html
Hi Alan what boiler would you recommend . I have 9 rads the one I have is a ideal classic we've had it 20 years .it is a conventional boiler thanks
brian jones Baxi Platinum is a great choice or the Viessmann 100, Thanks
Thanks Alan all the best
brian jones , get the Viessmann vitodens 100 it’s a great boiler, I recommended one to my neighbour last year & he was really impressed with how quiet it was ,& how quick it warms up all the rads, but best off all its extremely gas efficient !
@@SalimKhan-gk1fh thanks you for your advice
brian jones , your welcome Brian, just ensure u use somebody who is familiar with whatever brand of boiler you choose and also any subsequent servicing is carried out to Allen harts thoroughly high standard! I must be on my 20th viessmann boiler fitted so far
I only had to call them out once & the engineer was brilliant and found the issue very quickly, which was an installer issue!
This boiler Allen is working on has been mistakenly written off and replaced due to it only needing a thoroughly good clean!
I see this situation quite often now
Hi Allen
great video
where did you get that heat exchanger cleaning blade?
Darren Elaouad Viessmann rep. Thanks
Great video Allen, got to do a plate heat ex on the 100-w 25kw combi, is it the same? Don't usually do much on the viesmanns, parts really expensive, I am gas safe by the way👍
Very easy to do, yes.
Hi Allen- ive got a Viessmann V100 WB1C 35kw that needs the pump replacing. Does the whole system have to be drained down to replace a pump, or are there isolating valves? Cheers
Hi Allen. Good video as usual. Where did you get that short probe for the Kane mate?
Allen?
Kane 😂😂😂😂