Questions & Answers for: mr heater 3 flashes

Mr Heater MH75KT - won't start with diesel I bought a brand new Mr Heater MH75KT multi-fuel space heater, filled it with #2 diesel, and it will not burn. Igniter is throwing a good spark, fuel is ...

...Mr. Heater. It would light and run until it reached the setting on the thermostat, then wouldn't relight and had the code 3. I found when assembled from the factory, the service door was install ...

blower starts but ignitor will not fire. 3 flash fault on control board which the manual says is a pressure switch failure. worked fine when i shut it down this spring. Jump out the switch to test it.

...3 flashes is an error code. Most likely you have either a vent blockage, the inducer motor is not spinning fast enough to draw a vacuum on the pressure switch, you have a bad pressure switch or a ...

Mr.Heater Once the Heater is hooked up to the thermostate it flashes 3 times ? if you disconnect the theromostate it flashes normal operation code with no call for heat ? Please Help Make sure you are

...3 flashes code and i have already tryed a new thermostate .... as soon as i unhook the thermostate it flashes for normal operation with no call for heat it is a 75000 natural gas Try using it without ...

3 years old. Will not ignite. Board is flashing green coorectly. After the 3rd try it kicks off like manual says. Gas supply and thermostat are good. Hoping for possible causes? Ideas to check or most

heater is in lockout according to the 2 flash code I'm seeing. My tank is half full so I no it's not a supply problem, and it has worked in the past. It tries to fire but it won't stay lit. It will go

...mr heater 75000 with a 4 flash blink code. the heater is brand new, only worked for 3 days. i have bypassed the 2 switches but still cant clear the 4 flash blink code. According to the ...

...3 flashes. Gas supply should be good, heater in another room ups mhu75ng stopped lighting after about a year. Fan starts, but burner doesn't light. Fan stops after about a minute. LED code is ...