Quote:
Originally Posted by revrusty
Yes. The fan runs for about 20seconds, furnace does not ignite. Then fan cuts off.
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During that 20 seconds, near the end of the cycle, do you hear any "clicking" ?? The clicking is the "ignition cycle" which only occurs IF other conditions are met. The fan running is only one of those conditions. The sail switch must open (a check for the fan speed), the gas valve must open, and then the "clicking occurs". Once the propane is ignited, the flame sensor must detect a flame (check for successful ignition) and then the lockout allows the furnace to operate until the thermostat set temperature is satisfied....
There's much more than "the fan runs for about 20seconds, furnace does not ignite"...
Do you hear the clicking? If so, do you hear the propane "whoosh" as it ignites and feel the heat at the top vent outlet on the side of your trailer?