Garage heater trouble shooting
I don’t stop in here very often, I tend to hang out at Knots more. This question seemed like it would be better posted here though.
I have a Mr Heater, natural gas burning, hanging garage heater that is only a year old. It won’t seem to light now. I figured it was the ignitor and they are cheap so I ordered one and a flame sensor also. I replaced both and it still won’t fire. I can light the flame with a lighter when the thermostat calls for heat and you can hear the gas valve click open so that isn’t the problem. After replacing the parts and having no change I tried to see if the ignitor was getting any voltage (Don’t know what it should get) with my multimeter set on the lowest volt setting and didn’t get anything. I took off the wire that goes from the circuit board to the ignitor and tested it for continuity and it was good. I then checked the connector on the circuit board that the wire plugs into and still didn’t get any voltage. BTW when I checked the voltage I just grounded the probe to the heater itself. Right or not?
Anyway, I now suspect the circuit board but they are fifty bucks and I don’t want to buy one unless I know that is the problem. If it makes any difference I do woodworking in the garage so the heater is exposed to sawdust.