Question about Heating & Cooling
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Posted on Jan 02, 2017
Check your furnace for power. will be 4 wires. power ground and 2 thermostat wires. Check for power at the time delay relay, if you have power there check for power going in the fan motor, if power in motor wire, motor is bad. If no power in motor wire and power going to circuit board take the 2 thermostat wire apart and wrap the 2 together comimg from the thermostat. Fan will stat in about 30 seconds. If it does you need a control kit in the ac. But sounds to me like you have a furnace problem.
Posted on Mar 19, 2009
if your power vent moter is not running you should not have have glowing ignitor.Frist the vent moter must close an air prove switch in series with the idnitor .seems you have a stuck air prove switch.Its the one with a hose attached
Posted on Apr 07, 2009
SOURCE: We have an Atwood 8525
Atwood Excalibur 8500-III furnace parts can be found at:American RV ph.# 626-513-4777
an off balance or, wobbly fan can cause the screeching as can a combustion fan that has become loose on the motor shaft
there is a small notch in one of the fan blades a long 1/8" allen wrench goes into this and fits into an allen screw that locks the fan onto the motor shaft
there is a small hole just to the side of the combustion fan shroud this can be used to enter the allen screw on the fan's collar
if your furnace ignites then goes out
check your sail switch: it must be pressed and held down by the fan air before ignition can occur or, for the burner to continue to burn
the high limit switch should remain closed if it doesn't show continiuity with an ohm meter replace it.
Posted on Dec 15, 2014
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