Question about Ducane 436 inch 2 - 2 burner Grill
My ducane furnace wont satisfy the thermostat. when I turn up the heat the burner runs for about a minute, blows out, all the while the fan motor continues to run. when i pull the switch board cover, it blinks 3 times. says that the pressure switch is the problem. I have put 4 pressure switches on this furnace in 3 years. is this just a cheaply made part? or is there other problems causing the 3 blinks(faulty pressure switch)?
A short cycle heat cycle indicat a pressure switch replacement was needed. This did not fix the problem. the problem was in PCV line since the end was filled with slugs and cause the line to backup with water. When this happen the system would stop asking for gas. the water would leak out and it would restart. The problem was fixed by cleaning value at end of PCV. This released the water, two quart of water, that was back up causing problem. Curious if a filter change indicator was providing a clue that was missed?
Posted on Feb 24, 2009
The high limit switch on the exhaust fan is bad. Ducane has a replacement part but your contractor has to call them to get it. I am a contractor and found the problem first as ducane techs told me.
Posted on Feb 26, 2011
Check that there is not a small piece of trash getting into the tube for the pressure switch.
Also check that the evaporator us not plugged full of dirt and dust from an improperly installed or poorly maintenanced filter.
This will cause burner short cycling and inability to warm the space.
Reply what you find and I'll give further instruction.
Posted on Jan 28, 2009
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Posted on Jan 02, 2017
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