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Old 10-11-2019, 09:08 PM   #1
Join Date: Dec 2017
Posts: 57
Heater question

I put the Coleman digital thermostat in our 2018 2104S last year. When I power up the trailer the heater seems to be flaky. I always light the stove to get the propane line purged but when I adjust the thermostat to a temperature that should turn the heater on nothing happens. No attempts to light no fan. After changing the fan switch and the heat/cool switch multiple times the heater will start. I am not sure what gets the heater going but it works perfectly after the initial secret start sequence. Anyone have an idea what the problem might be?

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Old 10-12-2019, 07:18 AM   #2
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Location: Idaho
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It may be the the stat has a built in delay. Place the heat cool switch in heat fan in auto and adjust the temp at least 3* above the desired temp and wait (try timing it, if its five or less may be a delay). I have the same stat but have never paid any attention to the time between adjustment and starting of the furnace.

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Old 10-12-2019, 07:35 AM   #3
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Location: South Western PA
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I too replaced analog Coleman thermostat with the digital and have no issues as you describe.

Adding to what SeaDog said, I find if I only raise (or lower on cool) by just 1°, the furnace (or A/C) doesn't always kick on immediately but does come on eventually and raises the temp set point.

I'm sure the offset built into the stat causes this.
2° gets an immediate response.
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