Big Maxx Heater SN 0253700

[Rmbell]

But this one on the general discussion board also.
The LED light is flashing 3 times checked the hose from the exhaust fan an it clear.
The LED light starts out flashing none stop not fast.Then goes to 3 flashes.
Looking for some Ideas on fixing it
Before it gets cold as heck again, in S.E. MN we were at -30 last sunday, now it's +34.

 

[dave67fd]

Try posting on the Heating and A/C board.

 

[dave67fd]

When Thermostat calls for heat the Combustion air blower should start immediately. Pressure switch proves blower operation. 3 flashes indicates pressure switch fail close or fail open. If flue is clear could be CAB, PS or control board issue. Call factory or service tech.