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Old 01-08-2010, 11:10 AM   #1
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1976 Argosy 24
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furnace blowers won't come on

My Argosy 24 1976 has a suburban furnace that doesn't want to blow, the pilot lite lites, but that's it. Any ideas where to look first? the power is on to the DC system (And AC).
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Old 01-08-2010, 11:18 AM   #2
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The thermostat would be the first place I would look. Inside the thermostat there is a set of contacts. Make sure they are clean and touching.
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Old 01-08-2010, 11:39 AM   #3
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You can bypass the thermostst by tying the 2 blue wire together. if the fan turns on then it a problem with the thermostst like Richard said. Here's a manual on suburban heaters. It may not be the exact model but it will show you the basic wiring and how it operates
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Old 01-08-2010, 02:03 PM   #4
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The blower runs on 12v. Check the 12v fuse in the fuse panel. If that does not do it check the thermocouple, microswitch and sail switch if you know how to do that.
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Old 01-09-2010, 11:57 AM   #5
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thermostat tests good, connecting the blue wires together does nothing. space is very limiting, I have the shelve above removed and the water heater is out too (new water heater arrives this week.) Im contemplating removing the unit to gain access to the wiring. I did check the + and - wires coming to the unit and I do have power to them. Any thoughts on removing the unit or even removing the kitchen cabinet? I've been wanting to put new wood flooring down and run new plumbing and this may be the ticket to easier access.
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Old 01-09-2010, 12:06 PM   #6
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I would also check the continuity of the 2 blue wires. I had a loose connector that prevented my furnace from starting. The connector was located behind the wall the thermostat was located on. It was inside the closet in my bath area.

You could also just jumper where the two blue wires connect to the furnace and bypass the thermostat for testing.
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Old 01-09-2010, 01:48 PM   #7
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The body of the furnace itself may slide out of the cabinet on 2 tracks. The furnace body is released by taking out a screw at the base.

Older furnaces are difficult if not impossible to find parts for or a tech who is willing to work on them. Others have decided to just replace the furnace. Newer furnaces are a lot less troublesome.

By the way, what model furnace do you have in your Argosy? There was a problem with the NT22 crossover tube letting carbon monoxide into the trailer and it was recalled.
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Old 01-09-2010, 04:15 PM   #8
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Yes, thats what I have , NT22. seeing that it's so old, I don't think anything would come drom the recall other than good advice to replace. Where would I check/contact?

Jim
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Old 01-09-2010, 07:29 PM   #9
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The recall has long since expired. I and a few others have replaced with a NT30. There are a couple of old threads you may be able to find in a search. Also there was an interesting thread a few days ago about a higher tech Atwood furnace.
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Old 01-11-2010, 09:09 AM   #10
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I replaced the blower motor and the crossover hose recently on my nt22. I bought all the parts from ppl motorhomes. Did you check out the manual that I posted? It has part #'s wiring diagrams and how to diagnos problems. It is very useful
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Old 01-12-2010, 08:08 PM   #11
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Thanks for the manual, it will be very helpful. my crossover tube is certainly cracked. what material did you replace it with? did you deem it more feesible/practical to rebuild it vs buying a new unit?

I ended up pulling the kitchen cabinets, dinette, and the old 12" square flooring tiles out, and I'll repaint the walls, put new flooring down, and rebuild new cabinets. thinking of putting in a bigger/newer frig. too. old cabinets are in great condition, just want a different look.
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Old 01-12-2010, 08:29 PM   #12
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The unit was in great shape. The blower motor had a bad bushing.My AS is from NM . very dry climate. no rust. When I ordered the motor the salesperson sold me the crossover hose and a rope seal. I hadn't thought about these parts. Works beautiful. I don't regret fixing it.
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Old 01-12-2010, 10:57 PM   #13
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NT22A Replacement

Thanks for posting the manual. When I tried to start the unit he pilot light lit but no blower etc. came on. Now I can at least look for voltage on it and try to find out what's wrong before moving on to the replacement step.

Did you get the parts from PPL in Houston?
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Old 01-13-2010, 12:23 AM   #14
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yes. I couldn't get anwhere on the web site so I called them. They were very helful.
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