I searched but cannot find an answer,,It seems that my heater fan comes on before the heater lights off. The fan runs for almost 40 seconds then you can hear the heater light off, when it reaches set temp you can hear the flame shut off but the fan continues to run for up to a minute!! So it starts blowing cold air then ends by cooling everything off again.My question: Can I adjust fan run time? On our Pop Up trailer the little heater fan would come on for like ten seconds then the heater would light, then at temp set the flame would go out and fan would only run for about fifteen seconds..

Sounds like the heater is working fine. What's the issue? For safety reasons the blower is suppose to start first which lifts a "sail" which then tells the heater it OK to commence the ignition starting system. The fan is suppose to run for a while after the heater shuts down to cool down the system and maximize the heat value.

ksg5000 nailed it....your system is working exactly like it needs to do, don't change a thing

It aggravates me too but that's how they work.

Mine works the same way. My wish is that the thermostat would show the ACTUAL temperature in addition to the set temperature. When the heat runs, I feel like it gets super hot (well over how it was set) and then it cools off to what seems like well below how it was set. It makes me wonder on occasion if the propane is low or out, though I've noticed with the heat running more now that I'm in MD that the system won't kick on at all (fan and furnace or even just fan) if there is no propane.

RavensFan24 wrote:Mine works the same way. My wish is that the thermostat would show the ACTUAL temperature in addition to the set temperature. When the heat runs, I feel like it gets super hot (well over how it was set) and then it cools off to what seems like well below how it was set. It makes me wonder on occasion if the propane is low or out, though I've noticed with the heat running more now that I'm in MD that the system won't kick on at all (fan and furnace or even just fan) if there is no propane.Yes,, thats my issue, If I could reduce the amount of fan run on after the flame goes out it would retain the heat. Instead it feel like it is blowing off the heat generated.

heater Fan Run Time | Good Sam Community

17 Replies

Old-Biscuit
Explorer III
Dec 03, 2016
Fan runs at first to 'purge' combustion chamber of ANY possible fuel ---safety feature.(SO no explosion occurs)

Fan continues to run AFTER fuel shuts-off to remove excess heat from heat exchanger to cool it down----again another safety feature (fire hazard)

One motor runs TWO fan wheels . One for combustion side and one for room air side, so when motor runs both wheels move air

NO you can NOT change the 'purge' or 'cool down' time ---factory preset
trail-explorer
Explorer
Dec 03, 2016
jake2250 wrote:
Yes,, thats my issue, If I could reduce the amount of fan run on after the flame goes out it would retain the heat. Instead it feel like it is blowing off the heat generated.

It's blowing the generated heat (from the heat exchanger/flame chamber) into the RV... so I'm not sure what's bad about that.

It's a safety function to cool off the heat exchanger before shutting down the fan. I'm sure it's probably a safety requirement of the UL.

Home gas furnaces operate the same way.
jake2250
Explorer
Dec 03, 2016
RavensFan24 wrote:
Mine works the same way. My wish is that the thermostat would show the ACTUAL temperature in addition to the set temperature. When the heat runs, I feel like it gets super hot (well over how it was set) and then it cools off to what seems like well below how it was set. It makes me wonder on occasion if the propane is low or out, though I've noticed with the heat running more now that I'm in MD that the system won't kick on at all (fan and furnace or even just fan) if there is no propane.

Yes,, thats my issue, If I could reduce the amount of fan run on after the flame goes out it would retain the heat. Instead it feel like it is blowing off the heat generated.
RavensFan24
Explorer
Dec 03, 2016
Mine works the same way. My wish is that the thermostat would show the ACTUAL temperature in addition to the set temperature. When the heat runs, I feel like it gets super hot (well over how it was set) and then it cools off to what seems like well below how it was set. It makes me wonder on occasion if the propane is low or out, though I've noticed with the heat running more now that I'm in MD that the system won't kick on at all (fan and furnace or even just fan) if there is no propane.
WayneAt63044
Explorer
Dec 03, 2016
It aggravates me too but that's how they work.
FLY_4_FUN
Explorer
Dec 02, 2016
ksg5000 nailed it....your system is working exactly like it needs to do, don't change a thing
ksg5000
Explorer
Dec 02, 2016
Sounds like the heater is working fine. What's the issue? For safety reasons the blower is suppose to start first which lifts a "sail" which then tells the heater it OK to commence the ignition starting system. The fan is suppose to run for a while after the heater shuts down to cool down the system and maximize the heat value.

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heater Fan Run Time

17 Replies

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