Heater Burner ignites but main blower motor will not turn on
My Mr. Heater Big Maxx natural gas garage heater will not cycle normally. The main burner ignites but will try three times to have the blower motor/fan start before shutting down. I can work the thermostat and it will attempt three more times, then shuts down. Once in a while, say once in four or five attempts, the heater blower motor/fan will start and will blow until the cut-off temperature is reached. Then it starts the cycle three times and shut down events again. The burner does ignite and burns. I use the heater in a workshop that does have high levels of wood dust from time to time. The heater is right about 2 years old. It worked well until this episode. Any help will be appreciated.
Heating & Cooling - Mr. Heater - Natural Gas Garage Heater - 45,000 BTU
Answers & Comments
It sound like the blower motor may be seizing up. try spining the blade by hand to see if it feels free or not. the motor could be trying to turn but can then tripping itself out on overload. (most motors have built in safety overloads which will trip during an overcurrant event. aka too many amps.) you may have to replace blower motor