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Old 10-04-2009, 04:24 PM   #1
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1979 30' Argosy
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suburban furnace redo or new ?

so as winter approaches i have began work on my suburban NT30MA. so far the blower is fine. gas is coming up to the flange nut as it enters the furnace. but no click, and no ignition. i pulled out the inner relay and found a broken wire harness and another cord running to the igniter completely disconnected. happy to have found a possible quick fix soon let me down,as i cannot find a replacement wire harness. the guy at the RV place tells me the relay board is from a atwood water heater and does not even belong there. i'm includeing some photos of the bad switch and the heater itself. is it worth to replace what i can, pull it out and bench test or buy a new one. more questions, what's the best way to get that sucker outta there. does anyone know what type of furnace ican install into that same space? thanks
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Old 10-04-2009, 04:56 PM   #2
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so as winter approaches i have began work on my suburban NT30MA. so far the blower is fine. gas is coming up to the flange nut as it enters the furnace. but no click, and no ignition. i pulled out the inner relay and found a broken wire harness and another cord running to the igniter completely disconnected. happy to have found a possible quick fix soon let me down,as i cannot find a replacement wire harness. the guy at the RV place tells me the relay board is from a atwood water heater and does not even belong there. i'm includeing some photos of the bad switch and the heater itself. is it worth to replace what i can, pull it out and bench test or buy a new one. more questions, what's the best way to get that sucker outta there. does anyone know what type of furnace ican install into that same space? thanks
Thirty years is a long time for any appliance.

You can install a Suburban NT-32.

Andy
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Old 10-04-2009, 05:04 PM   #3
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You may be hard pressed to find parts or anyone to work on your oldie. My experience is most service guys won't touch em for liability reasons.

If it is similar to my suburban, which it probably is, you take off the outside trim, disconnect the gas, remove a couple of screws holding the guts to the cabinet and slide out the furnace. Then there are a few more screws holding the cabinet to the floor.
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Old 10-04-2009, 05:55 PM   #4
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I agree- get a new one, and you'll have no worries. Or, if you don't travel north during the colder months, or if you are usually plugged into shore power, just get rid of it and/or get an electric space heater or 2. I got rid of my furnace, and don't miss it at all.
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Old 10-04-2009, 06:11 PM   #5
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Get a fresh one; most new units will slide into the existing cabinet.
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Old 10-04-2009, 07:19 PM   #6
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I agree, get a new one. Will be money well spent. I spend a couple of days with my old NT-22. After all the trouble shooting and getting it to run on the bench I had an HVAC guy look at it. He found a hole in the heat exchanger (not the crossover that was the cause of the recall, that had been retrofitted and was fine). I missed it and it could have been fatal.
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Old 10-04-2009, 08:12 PM   #7
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I'd replace the factory board at the same time: Suburban boards don't last long; if a couple of years.

Dinosaur Electronics Home. High quality circuit boards for RV appliances.
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Old 10-04-2009, 08:39 PM   #8
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make mine piezo...

who makes the best pizza pie in st augustine?

as i recall it's a little place just south of anastasia s.p.

anyway, BUY A NEW FURNACE.

the risks are too great with the old one, IF you plan to use it.

cracks that let CO in, internally old/brittle wiring, die'n fans and so on...

besides the new models are auto start (piezo-electric) and come with a warranty.

those pizza ovens are 550 degrees, toasty!

cheers
2air'
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