Atwood 8525 IV Furnace - No Blower Run
Hi All, I have been doing battle with my 2002 Coachmen Catalina Lite, with an Atwood 8525 IV furnace. About a year ago, after over a decade of perfect operation, it suddenly would not start up any...
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Hi Everyone-
THANK YOU for all your help and suggestions, and big thank you to Alan (Budwich) for the phone call. I'm actually in Kanata too!
I got it fixed! Here's how:
The 6v to the thermostat was the dead giveaway. Ultimately, I wound up removing the gas cooking stove for easier access to the furnace unit underneath. This is where the wire nuts were at to connect the blue TH wires externally, to the internal smaller gauge TH wires to the wall.
1st, I jumped 12v directly from the external on/off switch to the TH contact on the relay board. Furnace immediately started, ignited and ran without issue. So that removed the relay board finally.
Inside, I removed the wire nuts from the two thermostat wires up in the wall. Solid 12v in on one end, nothing on the other. Touched together- and bingo- furnace runs again.
Used new wire to wire nut up to existing thermostat, and bingo- runs again.
Somewhere along the way from the wall inlet above the furnace, to the actual thermostat, the wires either grounded out through the insulation or got cut, or "something" that resulted in a 6v drop across the copper.
I replaced the wire to thermostat by snaking it back along the wall and then inside some self stick panduit up the wall to make it look nice- and all fixed!
THANK YOU for all your help and suggestions, and big thank you to Alan (Budwich) for the phone call. I'm actually in Kanata too!
I got it fixed! Here's how:
The 6v to the thermostat was the dead giveaway. Ultimately, I wound up removing the gas cooking stove for easier access to the furnace unit underneath. This is where the wire nuts were at to connect the blue TH wires externally, to the internal smaller gauge TH wires to the wall.
1st, I jumped 12v directly from the external on/off switch to the TH contact on the relay board. Furnace immediately started, ignited and ran without issue. So that removed the relay board finally.
Inside, I removed the wire nuts from the two thermostat wires up in the wall. Solid 12v in on one end, nothing on the other. Touched together- and bingo- furnace runs again.
Used new wire to wire nut up to existing thermostat, and bingo- runs again.
Somewhere along the way from the wall inlet above the furnace, to the actual thermostat, the wires either grounded out through the insulation or got cut, or "something" that resulted in a 6v drop across the copper.
I replaced the wire to thermostat by snaking it back along the wall and then inside some self stick panduit up the wall to make it look nice- and all fixed!
