Heat won't come on in auto mode error from diagnostic panel flashing 3 times

theresa-in-ky · #1 Oct 18, 2006, 08:04 AM

In January 2006 I had a new furnace installed ( a coleman gas furnace Model # BGAA070BDTBJ) and this ran fine throughout the rest of that winter. Early in the summer our thermostat went out and I installed a new Hunter thermostat # 42999 and I hooked it up as shown in the directions and it worked great with the central air all summer. Last weekend I tried to turn on the heat and this worked throughout 1 cycle then it kicked off and did not come back on even though the temp in the room was much colder and should have kicked back on. I looked inside the door for the furnace and seen that the indicator was flashing 3 times and according to the diagnostic panel this means - Combustion air switch failed to close. Is this something that is easy to fix or should I call someone. The furnace is under warrenty still.

labman · Oct 18, 2006, 08:26 AM

If it is under warranty, call somebody. It may or may not be an easy fix, and shouldn't have anything to do with the thermostat.

theresa-in-ky · Oct 18, 2006, 02:09 PM

Thank You for your quick response. I have called the service person that installed the furnace. Once again, Thanks.



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