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Old 04-12-2024, 10:09 PM   #1
srgsem
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Dometic furnace

Woke up middle of night to no heat....have not had any issues....battery full...propane on (Stove burners work)...set at 70*..inside heat reading 61*....brr....troubleshooted on you-tube....lots of info on ignition and forward; but my fan blower will not start....which I know is needed for ignition.....checked fuses and breakers....all good... hit the "fan" switch on the control panel and nothing.....help....it's cold!!!....
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Old 04-13-2024, 06:38 AM   #2
chuckster57
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Which thermostat do you have? Fan control is for the fan in the AC unit.
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Old 04-13-2024, 07:09 AM   #3
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First thing to check would be the furnace fuse on the 12 volt DC panel in the power center. If that's good, then the thermostat connections behind the thermostat. Then the furnace connection plugs/wires at the furnace.

You're correct, the fan is the first "easy to hear/see" step in furnace ignition, and if the fuse in the fuse panel is blown, no power gets to the furnace fan to start things when the thermostat calls for heat. Hopefully it's just a fuse.
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Old 04-13-2024, 08:08 AM   #4
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You have the Dometic 10 button thermostat. It will communicate with the zone 1 AC. This may help:

https://www.thermostatmanuals.com/do...ervice-manual/
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Old 04-13-2024, 08:35 AM   #5
srgsem
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Unhappy

Quote:
Originally Posted by chuckster57 View Post
You have the Dometic 10 button thermostat. It will communicate with the zone 1 AC. This may help:

https://www.thermostatmanuals.com/do...ervice-manual/
Checked out the diagnostic manual....think I would need an electrical engineering degree to understand all that....LOL....I will probably have to find a tech to come out and diagnose it , and empty my wallet to him...I was hoping it would be something simple....Thanks so much for your help...
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Old 04-13-2024, 06:49 PM   #6
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Hope yours is easy. I had an intermittent furnace I chased for two or three years (didn't often matter as we are mainly summer-vacation southland campers). Turned out to be a mouse-chewed wire in the ceiling, between the A/C gateway and the furnace unit. Brutal.
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Old 04-14-2024, 08:42 AM   #7
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Good luck hope it’s an easy fix. I had furnace problems at beginning of winter. It was a mess getting it fixed. Ended up replacing the furnace. Went through 3 different technicians with different companies. They replaced everything you could think of. Last technician suspected the baffles in the furnace had collapsed or were block from something. After extended warranty send a 3d party out they agreed to replace it. It was an ongoing and frustrating problem.
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