Rear Furnace Replacement for a 1988 345 LE

[coairstream]

Hey guys after extensive troubleshooting my rear bedroom ducted furnace is shot! It's the small unit on the driver's side behind the bathroom under the single closet door in the bedroom.

It's a Duo-Therm MODEL No. 90130.004 PROD No. 9917508.21, but when I google it for a replacement, nothing comes up, and you're better off finding help at Home Depot vs. calling my local Airstream dealer. I called vintage trailer supply but they couldn't find anything off of the model number either.

I'm sure several of you have experienced the same failure and know of an acceptable replacement. Please advise.

Thanks In Advance!

[bobmiller1]

You’re lucky that the Duo-Therm didn’t do you in......they were bad from day 1.....had problems with the heat exchanger cracking and carbon monoxide filling the motor home. Look for a small surburban, I have one that I took out of the rear of the 370LE if you are interested, let me know, Regards, Bob

[coairstream]

Hey bob thanks for the reply and I am interested. Please PM me on how to get ahold of you.

[stream3]

Originally Posted by bobmiller1

You’re lucky that the Duo-Therm didn’t do you in......they were bad from day 1.....had problems with the heat exchanger cracking and carbon monoxide filling the motor home. Look for a small surburban, I have one that I took out of the rear of the 370LE if you are interested, let me know, Regards, Bob

Here's the proof - this is an image of the Duo-Therm in action in my '88 345LE. A miracle wife and I didn't off ourselves, but it could explain why I'm a bit shy of a full deck. I have a whole new respect for these little combustion chambers!

[davejay]

Hey,
I to am now thinking of replacing my stock rear furnace. When I did the front one, I had to fab a plate to adjust for the vent plate being located differently. Does anyone make a direct replacement furnace?

Also. What do y'all think about tankless water heaters. Seems to make more sense than the old tank jobs. My neighbor just bought a new travel trailor and has a tankless heater. Loves it. Any suggestions?
I got so many new parts in this thing, I might as well replace all the old stuff, and be done with it. This coach only has 5000 miles on it, but I suspect it got used a lot sitting. So the furnace, water heater, fridge (replaced) front furnace( replaced) probably got a boatload of time on them. I think I'll just replace the old stuff with newer tech stuff. DJ

[Paul J Mauro]

hey bob had a nice trip to rogers rock in the fall and vermont last weekend both cold so guess what rear heat unit is finally giving up .fan squeal etc . looks like you went with a non stock new unit ? since you dislike the duo therms - what fits in there ? or is it a total fab job to modify for replacement ? hope all is AOK with you perhaps we will bump in 2021 local travel this year for us

[bobmiller1]

Send me a picture of your rear bedroom so I can see application, Regards, Bob

[Paul J Mauro]

Originally Posted by bobmiller1

Send me a picture of your rear bedroom so I can see application, Regards, Bob

ok will do
Thx

PJM