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Rear Heater not working
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kc_rusty
"5+ Years of Active Membership"
posted
My rear furnace will blow air but no heat. I'm looking for suggestions as to what the problem could be. What can I do to check it out? Could there be a spider web clogging it or some else I can check?

Thanks


Russell and Donna
1988 GM 454 powered 33' Barth Regal
Gibson Exhaust, Bilsteins, ipd sway bar
 
Posts: 136 | Location: overland park,ks,usa | Member Since: 08-20-2002Reply With QuoteReport This Post
Rusty
Supporting Member of Barthmobile.com 2/16
Captain Doom
Picture of Rusty
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The furnace ignition circuit starts a spark and opens the gas valve only when the "sail" in the blower chamber has enough air pressure to trip the switch.

Your issue could be one of the following:

1. Low battery, so the blower's not blowing enough to trip the switch to the ignitor.
2. The ignitor isn't producing a spark; a thermocouple senses a spark and opens the gas valve. The thermocouple could be also be bad.
3. The gas line needs to be bled of air - bleed it out by lighting a stover burner.
4. Wiring to the sail switch, to the ignitor and thermocouple has an open.

A spider web's unlikely to cause the issue....


Rusty

MilSpec AMG 6.5L TD 230HP; built-to-order by Peninsular Engines: Hi-pop injectors, gear-driven camshaft, non-waste-gated, high-output turbo, 18:1 pistons. Fuel economy increased by 15-20%, power, WOW!"StaRV II"

'94 28' Breakaway: MilSpec AMG 6.5L TD 230HP

Nelson and Chester, not-spoiled Golden Retrievers

Sometimes I think we're alone in the universe, and sometimes I think we're not.
In either case the idea is quite staggering. - Arthur C. Clarke

It was a woman who drove me to drink, and I've been searching thirty years to find her and thank her - W. C. Fields
 
Posts: 7734 | Location: Brooker, FL, USA | Member Since: 09-08-2005Reply With QuoteReport This Post
Dalton
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Furnace troubles been there!
I had a problem with my atwood 8531 1V furnace, would try to light, but the sail switch turned off. Problem was 2 styrofoam cups of sand out of the burner chamber as well as I had to replace the valve that was plugged by yes two tbl spoons of sand in it That was my problem !!
Dalton

1974 C Class 19'
30000 btu
 
Posts: 61 | Location: Calgary AB | Member Since: 04-03-2008Reply With QuoteReport This Post
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