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...
Forum Discussion
don't have any answers for you but more questions? what wiring have you got connected at the thermostat... for that matter, what thermostat are you using?
The 6v going to the control board (TH) doesn't seem right... I would expect "supply voltages" which would typically be 12v.... or possibly ground depending on operation wiring (ie. "switched" ground or voltage).
Since you indicate that direct wiring of the motor works... follow that wiring back to the control board... monitor those same connections when operating the thermostat... what happens? Of course, check your grounds (using resistance not voltage on your meter... to a known ground point).
The 6v going to the control board (TH) doesn't seem right... I would expect "supply voltages" which would typically be 12v.... or possibly ground depending on operation wiring (ie. "switched" ground or voltage).
Since you indicate that direct wiring of the motor works... follow that wiring back to the control board... monitor those same connections when operating the thermostat... what happens? Of course, check your grounds (using resistance not voltage on your meter... to a known ground point).
