Mr. Heater Big Maxx not calling for heat, but no error codes.

Question edited for a lot more clarity.

From the maker.

Fuel Conversion Kit NG to LP

Mr. Heater https://www.mrheater.com > fuel-conversion-kit-ng-to...

Fuel Conversion kit for changing NPP overheads to LPP and from NG to LP. Kit includes all necessary labels and components required for the complete ...
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Mr. Heater ventless wall heater convert to LPG

The Garage Journal https://www.garagejournal.com > ... > Heating and A/C
Mr Heater supports converting the Big Maxx 50 and 80 from NG to LP and sells a kit with the orifices for $25. https://www.mrheater.com/big-maxx-fuel- ...

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With multimeter check l1 to ground on control board. Also check 24vac to ground to verify high and low voltage present at board.

Check all electrical connections at board check any moles plugs pins etc. if you have power going to board and no status light sounds like a bad board......

The capacitor in that unit is for starting the motor that drives the blower fan. It has no impact on the ignition of the gas burner. On the control board, there is a light that should be flashing, can you tell us how many times it is flashing?

On your heater, does it tell you a fault code for the number of blinks?

If you have cycled the power to the unit already, the fault code should have cleared. If the fault code cleared and then came back, sounds like either a issue the blower motor being shot, or a relay in between the ignition controller and or the ignition control is bad, not making the heater do anything.

I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_54ae41aaaffbab00

Your pressure switch may not be activating (ie closing and making contacts) This means you could have a blocked flue, clogged pressure switch tube or a bad pressure switch. The pressure switch is a safety feature to ensure your exhaust is not blocked and operating correctly. Find owners manual. Look at trouble shooting section. Open cabinet and look for error code light. If blinking 3 times, try "jumping" the pressure switch. To jump pressure switch you need to clear code be turning off power. When the unit/thermostat calls for heat the power vent fan starts first, this is when you need to jump the pressure switch. You need to do this in sequence. That is the unit first starts the power vent exhaust thus activating the pressure switch allowing the ignition cycle to the burners and heat. So the power vent fan needs to start first BEFORE you put the jumper on to bypass the pressure switch. Once the jumper is on it will call for ignition after approx 30 seconds. If ignites your problem is one of the 3 stated at the opening of this paragraph

is this a new heater or 2ndhand ???

You may very well be right because if the induced draft motor won't come on then the heatin cycle stops there. It makes me wonder about the board because of it doing the same thing even if it's not calling for heat. Thanks.

try national energy they are on line

You have a bad ignition mudule.