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Old 05-17-2020, 04:48 AM   #1
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Brand: Thor Motor Coach
State: Michigan
Posts: 2
THOR #14663
Furnace problems

My furnace is not starting, I can hear the igniter working along with the fan, but it is not starting. I have a full lp tank. If I turn it on and out it will start eventually start. But at night it just goes on and off.

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Old 05-17-2020, 05:04 PM   #2
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Brand: Thor Motor Coach
Model: Citation
State: Texas
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THOR #8139
We'll need a little more info, furnace manufacturer and mh info.
The most common problem seems to be a corroded circuit board, very easy to check and replace.
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Old 05-17-2020, 05:13 PM   #3
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State: Georgia
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...uh, a furnace is SUPPOSED to go on and off during the 'night' ... that's how it works.
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Old 05-17-2020, 10:40 PM   #4
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Brand: Thor Motor Coach
Model: ACE 29.2
State: Colorado
Posts: 180
THOR #10103
If the circuit board looks like mine did its toast! Get the number off yours and order a replacement or upgraded one from amazon
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Old 05-17-2020, 10:54 PM   #5
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Model: Chateau 31L
State: Florida
Posts: 2,060
THOR #12189
What he said. His is covered in rust. Mine was covered in corrosion (chalky white).
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