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Author Topic: RV furnace broke  (Read 4941 times)

Online sagerat

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RV furnace broke
« on: August 01, 2017, 07:44:31 AM »
The furnace in my trailer will not come on. Doesn't even try to ignite. I turn the thermostat wide open and it's just dead. Any ideas?

Offline baker5150

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Re: RV furnace broke
« Reply #1 on: August 01, 2017, 08:23:19 AM »
How old is it? Roughly.

I'd check the ignition module, most likely that's the issue.  Check for bad grounds, rust, corrosion, etc.

Online sagerat

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Re: RV furnace broke
« Reply #2 on: August 01, 2017, 09:18:57 AM »
2005 Nash, thanks

Offline Hilltop123

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Re: RV furnace broke
« Reply #3 on: August 01, 2017, 09:19:59 AM »
Is this a forced air system? Or just a radiant system?

Online sagerat

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Re: RV furnace broke
« Reply #4 on: August 01, 2017, 09:33:09 AM »
Forced air

Offline Hilltop123

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Re: RV furnace broke
« Reply #5 on: August 01, 2017, 10:30:24 AM »
Does the fan come on? Sorry for the stupid questions.

Offline baker5150

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Re: RV furnace broke
« Reply #6 on: August 01, 2017, 10:35:40 AM »
2005 Nash, thanks

That's new enough to have a pressure switch for the exhaust fan, when you fire it up does the fan blowing exhaust outside the trailer come on?
I assume you already checked fuses.

Online sagerat

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Re: RV furnace broke
« Reply #7 on: August 01, 2017, 10:44:01 AM »
No, nothing happens. I did check the fuse...

Offline Hilltop123

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Re: RV furnace broke
« Reply #8 on: August 01, 2017, 12:09:18 PM »
Did you set the thermostat, to its max setting. As hot out as it is, you will have to set it to the Hell setting. Before it will turn on.

Online sagerat

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Re: RV furnace broke
« Reply #9 on: August 01, 2017, 01:13:21 PM »
Yeah, I did it later at night and maxed it out. Played with it for a while and nothing.

Offline scotta

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Re: RV furnace broke
« Reply #10 on: August 01, 2017, 09:24:27 PM »
Is your thermostat set on heat and not in the cool or off position ?

Offline Humptulips

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Re: RV furnace broke
« Reply #11 on: August 01, 2017, 09:33:55 PM »
If the fan won't start up it will not turn on. I would check the voltage coming into the fan first. Are your batteries good or are you plugged into an electrical hookup?
Bet you can guess I had the same problem and it was because the fan was not getting a full 12 volts.
Bruce Vandervort

Offline NRA4LIFE

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Re: RV furnace broke
« Reply #12 on: August 01, 2017, 10:13:00 PM »
Sale switch?
Look man, some times you just gotta roll the dice

So many free days, so few fish....

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Re: RV furnace broke
« Reply #13 on: August 02, 2017, 06:27:53 AM »
Yeah, I've tried just on 12volt and then plugged in. Naturally you can't access hardly any of it without seriously taking it apart. Any chance it could be the thermostat unit itself?

Offline Smokepole

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Re: RV furnace broke
« Reply #14 on: August 02, 2017, 06:45:32 AM »
You can do a continuity test on the thermostat.  It is just a switch.  Or you can bypass it and see if the system fires up.

If the fan comes on, but furnace won't fire, it's most likely a low-voltage issue.  The fan needs to be up to speed to trip the sail switch.  If the fan is dirty, it may not move enough air to trip the sail switch. 

Let us know what the symptoms are, and I'll bet you will get some expert advice on here. 

 

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