mobilehomerepair.com

good morning,
i have a coleman model #DGAT056BD , the furnance fires for a very short period (about 5 secs)
than goes out and it will cycle and do it again and just keeps repeating this, the blower is working fine i replaced the batterys in the therostat there are no codes flashing, what could the problem be? thanks Joe

Hi,

Check the remote flame sensor for cracks and clean the rod with steel wool.

Could also be the ignitor, blockage in burner orifice or orifice spud(spider/web), dirty burner.


Try those first and if still not resolved, call an hvac tech out for testing of furnace components.


Thanks,
Robert