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Old 12-20-2015, 01:15 PM   #1
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Heater stopped working

Hello,

Sorry if this has already been covered, but I wasn't able find troubleshooting information for the heater in the forums.

I have a 2013 interstate and the heater has stopped working. It doesn't attempt to start when turned on via the thermostat. (As apposition to the gas line being off and it trying to start, but not being able to)

I checked the circuit breakers and see nothing out of the ordinary.

Hoping someone might have a suggestion and its some small issue I've overlooked.


Thanks,

Jeff


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Old 12-20-2015, 01:36 PM   #2
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Are you out of propane?
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Old 12-20-2015, 01:45 PM   #3
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Nope. Full tank. Again, I've tried to start t in the past with the propane off and it will "click click click" as it tries to start. Currently it does nothing. No fan comes on, etc.


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Old 12-20-2015, 01:53 PM   #4
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Is the pilot light on? If not you may have a bad thermocouple or clogged orifice. You can check the thermostat by crossing the 2 wires that connect it to the furnace. If the furnace starts you have a bad thermostat. If that does not solve the problem I would suspect a bad circuit board.
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Old 12-20-2015, 01:59 PM   #5
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Think I figured out the problem. I turned on the generator to see if that made a difference. (Shouldn't need the gen, but nothing else was working so I figured it couldn't hurt to try)

Anyway, once I turned k. The furnace, the domestic top unit turned on and started blowing air.

I had a valet brilliantly try to park the interstate in a cover garage and hit the top ax unit. The dealer replaced it over the summer but didn't set the dip switches correctly so furnace wasn't even an option showing up in the thermostat. They gave me the correct dip switch settings over the phone and I took of the cover front the top unit and set it correctly myself. The furnace setting showed up after changing the setting, but since it was the middle of summer I never actually tested to see if it worked.

Either the thermostat or top unit is probably confused and thinks it's should use the domestic for heat when it should be the furnace at door level.

Now that I think about it, it's probably the thermostat.

Wonder if I have programming instructions for the thermostat.

Hmm, I'll have to look and report back.

Anyone have experience with this that might be able to confirm if I'm looking on the right direction?


Thanks,

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Old 12-20-2015, 02:00 PM   #6
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I checked the circuit breakers and see nothing out of the ordinary.
The furnace will not attempt to start until the fan starts running. so if the fan doesn't start running, it's sensible to suspect an electrical problem. However, both the fan and the thermostat operate off 12vDC, not 120vAC. Checking circuit breakers doesn't help— you need to be checking fuses.

On Edit— the OP was posting at the same time I was, so my advice has already become a moot point. But instead of deleting this now-worthless post, I'll leave it up for the benefit of others who might be searching a solution to a similar problem later.
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Old 12-20-2015, 02:10 PM   #7
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No luck. Reset thermostat and no change.

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Old 12-20-2015, 02:30 PM   #8
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Prot,

The fan for the floor furnace unit or from the top domestic unit?

I'll start checking fuses either way...


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Old 12-20-2015, 02:34 PM   #9
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The fan for the floor furnace unit or from the top domestic unit?
Floor furnace fan is 12vDC. Rooftop A/C fan is 120vAC.
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Old 12-20-2015, 02:37 PM   #10
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Heater stopped working

Fuses all look ok.

No fan comes on from floor furnace. I pulled the cover and there is a reset switch, but it was already on and resetting it made no difference.

Anything else I should check it is this looking like a dealer issue?

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Old 12-20-2015, 02:42 PM   #11
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If you have the ability, check to see that you have 12VDC at the furnace igniter board. If you do, you either have s problem with said igniter board or a communication problem between the CCC-II, the A/C's control board and the furnace igniter board.


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Old 12-20-2015, 02:53 PM   #12
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Thanks lew. Ill see if I can confirm power there.

Thank you everyone for all the quick responses!


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Old 12-20-2015, 06:26 PM   #13
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Is the pilot light on? If not you may have a bad thermocouple or clogged orifice. You can check the thermostat by crossing the 2 wires that connect it to the furnace. If the furnace starts you have a bad thermostat. If that does not solve the problem I would suspect a bad circuit board.

No pilot light in the Interstate furnaces. It is electronic ignition.


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Old 12-20-2015, 07:55 PM   #14
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Can you open the furnace access door from the outside, access the reset switch from "reset" to "off", check for loose wires/reset them and switch back to "reset"?

Is there any red blink light code from the circuit board?
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