Question about Mr. Heater Natural Gas Garage Heater - 45,000 BTU

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3amp fuse on circuit board keeps blowing mr heater big max model

Unit blows it continuosly

Posted by Anonymous on

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Posted on Jan 02, 2017

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SOURCE: i have a 75,000 btu mr heater and the spark

Hi clean the flame senser blow the dust out of the heater check the fan switch might be dusty jump out pressure switch see if that helps

Posted on Feb 02, 2010

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SOURCE: I'm looking for replacement parts

try national energy they are on line

Posted on Sep 08, 2010

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SOURCE: how big of a breaker

It looks like a 15 amp breaker would be fine, here is the spec sheet
http://shopfnc.com/pdffiles/mhu45spec.pdf

As you can see the unit only pulls 3 amps.

Hope this helps

Posted on Nov 17, 2010

  • 1 Answer

SOURCE: My Mr. Heater, Cooker model,

Raeburn Heatranger will not start after being off for five days. Plenty fuel. Red light on panel comes on briefly when I press to start in override position.

Posted on Aug 10, 2011

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Mr. heater big maxx keeps blowing fuses, Replaced everything in it and still does it. sometimes it will run for a while


Maybe its the wire or the outlet. Does the wire get hot? Try a different outlet that is on a larger amp breaker.

Dec 07, 2016 | Mr. Heater Heating & Cooling

1 Answer

The fuse keeps blowing inside the edenpure heater


Generally speaking, fuses blow when too much current passes through them. Typically this happens when there is a short circuit some place. a connector or bare spot in a wire touching ground, a bad component on a circuit board, a bit of conductive debris on a circuit board all can cause shorts. If the fuse blows, it's doing its job to protect you from a problem you have yet to find.

Dec 01, 2013 | EDENPURE USA1000 Infrared Heater

1 Answer

I have a duo therm model 57915531. i have checked the breakers all the fuses and the thermostat. i have found a 3 amp fuse in the control panel of the roof unit. this fuse was blown. i replaced it and it...


That unit has a thermostat I believe and 12 or 24 volts to power it. The 3 amps tells me it may be either line or low voltage, see manual. the fuse blows due to a short in the control circuit, a transformer if low voltage.

Sep 10, 2011 | Dometic Rooftop RV Air Conditioner

1 Answer

Fuse blow each time I turn on air check for


disconnect the thernostat wires from the control board. Put a jumper wire between R & G put door back on and turn on power. Blower motor
should run, if it blows the fuse then you have a direct short between R &
G at the board. Do this with R and W(heat) and R & Y(cool).

By disconnecting the thermostat wires and reinserting them make sure that they do not touch when inserted into each terminal. If it still blows
that little 3amp fuse when jumpering between each sequence as mentioned above, then I think your board is bad. When Jumpering out the Y terminal you will have to have the AC wires still hooked up. If it
blows the fuse in that sequence. Disconnect the wires out at the condensor.

You mat have a bad contactor at the outdoor unit.

Jul 16, 2010 | Goodman GMS90703BXA Heater

1 Answer

Hi i changed colour cartridge tried trial run printer died; changed fuse in plug; still no power any suggestions please


in the printer there is a power supply board.there is a same type of 3amp fuse on the power supply board.if there is any kind of overheating in the power then the fuse in the plug and fuse on the power supply board blows out.in some cases only fuse on power supply board blows out.this fuse is placed on the board for safety reasons.because in the older model printers when this short circuit problem was happening at that time whole board used to blow out.so in the new model of printer a fuse is placed on the board ,so if any overheating or any power outage or any short circuit occurs.the fuse blows out instead of whole power supply board. You just need to replace the fuse on the power supply board by disassembling the printer.the power supply board is the green color square shaped board.its the board to which your power wire of printer is connected. the fuse is available at any local electric hardware shop.its not any special kind of fuse. This will help. Thanks please keep updated. please please do rate the solution positively .thank you for using fixya

Mar 18, 2010 | Lexmark X5150 All-In-One InkJet Printer

2 Answers

Blowing 3amp fuses


You have a low voltage short. A lot of low voltage shorts come from the wires that go out to the outdoor unit. Go outside and inspect those wires and that they are in good condition. Also check for any splices in those wires that they haven't degraded in any way. This is the only thing that will blow the fuse. That's why it's only 3 amps and based on the size of your fuse, it's a gas fired unit right? Have a great day!

Apr 10, 2009 | Ruud UBHC Air Conditioner

2 Answers

Thermal fuse keeps blowing


Mr. Larry (guru?)
The thermal fuse is just that It doesn't protect the circuit from over current although it certainly can open in that case. It is there to protect the board from overheating , thus the term thermal. The dishwasher could be allowing the water to heat too hot or the water heater in the home is turned up too much. The heater could also be shorted to case thus allowing it to be on even though the control is not calling for it especially if the polarity is incorrect to the dishwasher or the relay on the board could be welded closed so that the heater can't turn off even though the thermostat is satisfied. The best thing is to get a person who can check these things. You don't necessarily need to change the board with a fuse. I have changed many fuses with no other problems and verified that the machine was still working years later. sometimes the fuse just blows!

Dec 02, 2008 | Dishwashers

3 Answers

3amp fuse keeps burning out


Hi,

when a fuse blows, its telling you that theres a fault. this could be a loose or broken wire.
or alternatively, the fuse rating is too low. you could check the wires are tight. and also possibly try fitting a 5 amp fuse. check first that the fuse is rated correctly for the appliance. usually 3-5 or 13 Amps.

Mike @ compurepair.

Nov 17, 2008 | Goodman GMS90703BXA Heater

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