Glad I saw this, when I bought my place the furnace had a cracked exchanger, Coleman replaced it under the dgat recall. This tells me to keep an eye on the replacement now as well.
Maybe I should have listened to my installer. Mine said to go with the 80, but I had a DGAA 90 installed in our double wide in 2010, that came with a 10 year warranty on the heat exchanger. I had the installer out 9 1/2 years later and the HX looked just like the one in the video. They ordered the replacement from Coleman, the part was no charge and only had to pay the install charge. Totally glad I had it done, but will consider a smaller quieter furnace next time it cracks. I wonder if the new HX is any better?
You can derate the furnace to 77 or 70000 Btu by changing the Orfice to save the heat exchanger They are all the same furnace just a different size Orfice.
Wasn't there a recall on the heat exchangers in the early 2000's? I swear I remember these needing stainless steel plates installed as part of a recall/bulletin.
All I do is RV and small mobile home (up to 56K BTU) furnaces. It concerns me that internal shields block the view of some areas when inspecting the chamber/HX for cracks. Is there a particular CO detector or sensitivity level you recommend for a detector to sniff the output ducts with? Klein has a $99 model I've been considering.
@@MiHeatingGuy Saw the price of a heat exchanger. (STICKER SHOCK!) Almost the price of a new Coleman furnace. I see the new Colemans 80% even have those dang expensive ECM motors.
Anytime we see a 90 on a DGAA - Always cracked. Also when you factor in that many contractors who install AC afterward they do not install a Manufacture home AC coil (Mortex). The ductwork in manufacture homes are really small. You cannot go with a small narrow resi A coil in a manufacture home. Did you also notice the pleated filter?? If you where involved in the Coleman recall program they clearly state that pleated type filters are a no no, they really stress the heat exchangers. So .......1- Oversized furnace + Narrow AC coil + Pleated filters= Big Crack!
We always offered the high efficiency miller furnace. Most of our customers opted for the single stage millers and were very happy mainly with the difference in noise levels.
@@jasonshepherd6864 I still have customers who ignore it and want to run it, I remove components and leave them there to make it as hard on a customer to try and continue to run it. We get call backs from the FD at customers homes who continue to use it, we show them the report we shut it down
I replaced a heat exchanger on a 10 year old dgaa last year. Definitely stupid to have a 90k btu. They always crack. This model had the 2 speed psc blower. I made a jumper to use only the high speed on the motor. The slow speed just isn't fast enough.
That heat exchanger is cracked out like tyrone biggums from dave chapelle. Good catch! It seems coleman mobile furnaces and carrier furnaces of all sorts like to have really defective heat exchangers. That thing looks like it was massively overfired. Wow! Again, good catch
I’m surprised on a beast like that you offer a heat exchanger replacement,seems the labor would be cost prohibitive. Great job finding it, saved their life
Over the life of a new furnace, the price of gas could rise a lot - it's very cheap now. It blows my mind how mids are still commonly sold in the northeast us when venting/draining condensing is not an issue. Safer, quieter when direct vented anyway. We haven't had them in canada for 10 years, why throw 20% of the heat away? I understand giving different options though, not criticizing you.
Back in the 1970’s my mom,sister and I were overcome by carbon monoxide because of a cracked heat exchanger, if it wasn’t for the lab.the we had we wouldn’t be here now.
Colemans are junk to begin with. So glad we don't do a lot of those mobile homes. When they asked how this happens its because they don't do maintenance
Glad I saw this, when I bought my place the furnace had a cracked exchanger, Coleman replaced it under the dgat recall. This tells me to keep an eye on the replacement now as well.
You're an asset to everyone you help.
Maybe I should have listened to my installer. Mine said to go with the 80, but I had a DGAA 90 installed in our double wide in 2010, that came with a 10 year warranty on the heat exchanger. I had the installer out 9 1/2 years later and the HX looked just like the one in the video. They ordered the replacement from Coleman, the part was no charge and only had to pay the install charge. Totally glad I had it done, but will consider a smaller quieter furnace next time it cracks. I wonder if the new HX is any better?
You can derate the furnace to 77 or 70000 Btu by changing the Orfice to save the heat exchanger
They are all the same furnace just a different size Orfice.
Wasn't there a recall on the heat exchangers in the early 2000's? I swear I remember these needing stainless steel plates installed as part of a recall/bulletin.
All I do is RV and small mobile home (up to 56K BTU) furnaces. It concerns me that internal shields block the view of some areas when inspecting the chamber/HX for cracks. Is there a particular CO detector or sensitivity level you recommend for a detector to sniff the output ducts with? Klein has a $99 model I've been considering.
That looks like a shield cracked instead of a HX
I have that exact Coleman furnace. How hard is it to change out the heat exchanger in a Coleman counter flow?
It is something you do not want to do
@@MiHeatingGuy Saw the price of a heat exchanger. (STICKER SHOCK!) Almost the price of a new Coleman furnace. I see the new Colemans 80% even have those dang expensive ECM motors.
Yes
Anytime we see a 90 on a DGAA - Always cracked. Also when you factor in that many contractors who install AC afterward they do not install a Manufacture home AC coil (Mortex). The ductwork in manufacture homes are really small. You cannot go with a small narrow resi A coil in a manufacture home. Did you also notice the pleated filter?? If you where involved in the Coleman recall program they clearly state that pleated type filters are a no no, they really stress the heat exchangers.
So .......1- Oversized furnace + Narrow AC coil + Pleated filters= Big Crack!
Pleated 1 Inch filters on any force are a bad idea, problem is people don't listen.
So right!
Whats the gas pressure, temp rise and static,?
That 95,000 would never have passed an equipment commissioning.
Over heated , I bet nobody did a static pressure test , not enough air flow !
We always offered the high efficiency miller furnace. Most of our customers opted for the single stage millers and were very happy mainly with the difference in noise levels.
What the highest btu'son the miller's down flow ???
Good info in video thanks
i like how you don't waste any time and get to the diagnosis. I usually need 10 min to analyze the situation :)).
Do you take the customer to the furnace and show them the failure?
Yes. Most of the time I want them right next to me when I do the Inspection so there are no questions. They are seeing what I am doing
@@MiHeatingGuy I agree. Once Mr home owner sees exactly what we are talking about they're generally more understanding.
@@jasonshepherd6864 I still have customers who ignore it and want to run it, I remove components and leave them there to make it as hard on a customer to try and continue to run it. We get call backs from the FD at customers homes who continue to use it, we show them the report we shut it down
oversized furnace undersized ductwork,pleated filters yeah that will do it
I replaced a heat exchanger on a 10 year old dgaa last year. Definitely stupid to have a 90k btu. They always crack. This model had the 2 speed psc blower. I made a jumper to use only the high speed on the motor. The slow speed just isn't fast enough.
That heat exchanger is cracked out like tyrone biggums from dave chapelle. Good catch! It seems coleman mobile furnaces and carrier furnaces of all sorts like to have really defective heat exchangers. That thing looks like it was massively overfired. Wow! Again, good catch
LOL LOL😁🙈😁🙈
Was that thing even working?
Yes
I’m surprised on a beast like that you offer a heat exchanger replacement,seems the labor would be cost prohibitive. Great job finding it, saved their life
Especially since the HX isnt covered by warranty either
A cracked heat exchanger can also allow carbon monoxide to leak into the house
Oly crack on the camp heater.
Hey I've seen your Van's driving around, I live in Grand Blanc. Are you guys hiring?
yes
@@MiHeatingGuy where is your office located?
Over the life of a new furnace, the price of gas could rise a lot - it's very cheap now. It blows my mind how mids are still commonly sold in the northeast us when venting/draining condensing is not an issue. Safer, quieter when direct vented anyway. We haven't had them in canada for 10 years, why throw 20% of the heat away?
I understand giving different options though, not criticizing you.
Back in the 1970’s my mom,sister and I were overcome by carbon monoxide because of a cracked heat exchanger, if it wasn’t for the lab.the we had we wouldn’t be here now.
The dog kept walking from the carpeted floor and the hardwood floor and woke my mom up.
shut that sht down & disconnect control wires take pictures u did so for liability if they decide to run it regardless & something goes south
That's a Bigun' 😲
#128 thumbs uP
Unfortunately that customer got screwed by your company on the original install. More commission in the salesmans pocket.
Colemans are junk to begin with. So glad we don't do a lot of those mobile homes. When they asked how this happens its because they don't do maintenance
I see more Intertherm mobile furnaces than Coleman