Question about QMark BRH482 Heavy Duty Portable Electric Garage Heater 16,380 BTU

1 Answer

I have a QMARK garage heater Model#MUH0321. It runs constantly and will not shut off, I have to shut the breaker off in my electric panel. I tried to trouble shoot by disconnecting one of the thermostat wires but it just keeps running. It has run great for years I don't know what happened. Please help, thank you.

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  • Jesse Abbott
    Jesse Abbott Oct 23, 2013

    I dont what switch it would be there bout a dozen wires going to heating elements, a board, and several other things that I have no idea what they are.

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  • Expert
  • 194 Answers

I suspect the switch in the heater is defective.

Posted on Oct 21, 2013

  • Jesse Abbott
    Jesse Abbott Oct 21, 2013

    I will check it out thank you.

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Posted on Jan 02, 2017

appman67
  • 33 Answers

SOURCE: Problem wiring 240amp baseboard heaters

12 gauge wire sounds under sized for the application. And 20 amp 240 v breakers might be sufficient if you where wiring the heaters separately. But be sure that your wiring is not romex - because romex is an insulator and is not permitted in conduit. I would suggest that you up size your wire to 10 guage and your breaker to 30 amp as well. Then double check your heater wiring connections to insure that they're wired the same throughout.

Posted on May 03, 2009

frcs68
  • 1605 Answers

SOURCE: MUH108

4awg is about the size of battery jumper cable. or 240v multi-strend cable. and 48A is big. double 40A brakers.
the heater is 208v 3-phase 34,000BTU
it is call out to use the 240 comercial wiring.

Posted on Dec 02, 2008

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