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Old 04-08-2013, 08:02 PM   #11
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John (YoungKopernik) is right on.

If the fan blower is not running (or running strong enough) to close the sail switch, there is no power to the ignitor or gas valve.

Look for the reason the fan is not turning:

1) mud wasp nest in squirrel cage
2) rusted motor shaft
3) burned up motor
4) burned up wires
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Old 04-08-2013, 08:20 PM   #12
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Try blowing air into the furnace from the outside exhaust ports. You might have a dead spot on the commutator. If you can get the fan to turn the furnace might start. If this works you will need to replace the fan motor.
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Old 04-19-2013, 03:51 PM   #13
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Furnace still not working...

Ok, we have turned off the gas, disconnected the hoses to the gas, reconnected the hoses, turned on the gas, ever so slow and the same result. You turn the switch to heat, you hear one immediate click, then about 10 seconds later another click and that is it.
We have gas to the stove top, so gas is getting to the trailer.
Is there a breaker that maybe needs reset? Which fuse runs the furnace. Nothing of the fuses are labeled furnace, which is below the fridge.
Any suggestions?
Thanks!
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Old 04-19-2013, 08:43 PM   #14
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If the sail switch does not close you will not get a spark.
Since you hear a spark, the blower is running and power is being routed to the sparker and the gas solenoid.

If the solenoid does not open to release the gas or the flame does not light for a mixture reason you will get the symptoms you describe.

The sparker will try to light 3 times and then SHUT DOWN.

You will need to remove power completely to reset the spark control computer.
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Old 04-19-2013, 08:57 PM   #15
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Is the fan coming on?
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Old 04-19-2013, 09:25 PM   #16
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No, the fan does not come on...
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Old 04-20-2013, 09:14 AM   #17
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It is working now! My husband slammed the fridge door and it started working. Go figure?
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Old 04-20-2013, 09:21 AM   #18
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Quote:
Originally Posted by RobinC View Post
It is working now! My husband slammed the fridge door and it started working. Go figure?
Definitely points to a loose wire. Now, the job of finding it. Good Luck.
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Old 04-20-2013, 09:48 AM   #19
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It could also be a dead spot on the fan. Our fan motor had brushes. We had to replace the brushes and have the commutator turned down. Our furnace would do the same as yours. If yours have the same set up the brushes could have been stuck and the slamming of the door jarred them. Or as stated a loose wire.
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Old 04-20-2013, 11:40 AM   #20
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Quote:
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It is working now! My husband slammed the fridge door and it started working. Go figure?
Need to hire him as my mechanic!

Gotta love a "touch" like that!
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