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Old 11-08-2015, 07:28 AM   #1
Junior Member
Join Date: Nov 2015
Location: Lincoln
Posts: 12
Cool Seismic 4212 furnace question

Last night it got cold and when turning on the heater and setting the temp, the furnace kicked on and blew cool air out of the floor registers. For about two minutes. Then it shut off.
It wouldn't start up again until I slid the switch off/on at thermostat.

We have had this only two days, so I know this is probably user error. Can someone help us. We had a horrible time sleeping with that big pile of blankets.

Deanwilkinson is offline   Reply With Quote
Old 11-08-2015, 10:29 AM   #2
Join Date: Jan 2015
Location: London
Posts: 80
Verify that the propane tanks are turned on, and full. The furnace will run for a bit before the air flow sensors open the gas valve and light the flame. If the lines are full of air and not propane it won't light and then shut off. Try the process a couple more times to purge the air. you can also turn on the stove to help purge the air.


2006 Ram Mega Cab
2011 Octane T26Y
RoscoW is offline   Reply With Quote
Old 11-08-2015, 10:30 AM   #3
Join Date: Nov 2014
Location: Daytona Beach
Posts: 66
Has it worked before? Sounds like the burner is not igniting the LP gas and it will shut off.

2015 Silverado 2500HD LTZ Diesel
2015 Eagle HT 28.5 RSTS
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