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I have a intertherm gas furnace mgha-056abfc-01 the pilot light will not stay light.

I have replaced gas valve,thermal cupling, had gas meter checked, nothing works and there is no crack.

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If it's not the limit switch, perhaps the thermocouple or gas valve is defective.
Was there a gas outage?

Posted on Feb 24, 2014

  • Bobby Barre
    Bobby Barre Jan 24, 2017

    idk? replaced limit switch and still the pilot wont stay lite?

  • Bobby Barre
    Bobby Barre Jan 30, 2017

    it turns out that the thermocouple was repositioned improperly..

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  • Master
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Hello, have you checked the orifice or gas tube for any blockages? Sometimes dust and spider webs can block the flow of gas.

Posted on Oct 25, 2012

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koolbreezes
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SOURCE: Intertherm furnace pilot won't light

There should be a reset button in the upper chamer next to the fan motor. In the middle ,push in on the center red button to reset it, this tripps because it says I,m not gettig enough air flow due to a plugged or dirty fliter located on the front cover or door.

Posted on Dec 18, 2009

  • 587 Answers

SOURCE: Intertherm MGHA-075BFC-01 gas fired furnace - air

Probably the limit switch is open.

Posted on Oct 16, 2009

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1 Answer

I AM WORKING ON A COZY W501E WALL FURNACE AND CANT GET THE PILOT TO STAY LIT. i HAVE CHANGED THE GAS VALVE, THERMOCOUPLE,AND THE SENSOR FOR THE HIGH LIMIT. THE PILOT WONT STAY LIT.


Pretty much the only thing that will do that is the thermocouple not generating enough voltage for the valve to say it's OK.
Usually you need to hold the button for pilot lighting for 60 seconds. You can use a meter to check that it's generating enough power. The thermocouple has to be in the pilot flame properly.

Check this video:
https://www.youtube.com/watch?v=suen7QlJl4o

Gas furnace will not light Thermocouple test with the multimeter

Or see this site:
How to Test Thermocouple with Multi Meter Heating and Cooling

Feb 11, 2015 | Cozy Heating & Cooling

1 Answer

Intertherm wiring diagram for model number MGHA-056ABFC-05


you have a 24 volt shorts check your thermostat wires to see if they are frayed or if they are touching anything. Check your outside wires also go to the thermostat.

Jul 12, 2014 | Intertherm Heating & Cooling

1 Answer

My intertherm mgha is having pilot issues. The


The problem will be in what senses the pilot is lit. Either a thermocouple or maybe it uses an electrode and flame rectification. If it is an electrode you can try cleaning it. If it is a thermocouple you will have to replace it.

May 02, 2010 | Heating & Cooling

1 Answer

How do I light the pilot on my InterTherm MGBB 070 furnace? I have tried holding in the pilot switch but have had no success in getting the pilot lit.


Just to make sure you are trying to light the pilot, from the gas valve follow the small diameter pipe (1/8") to the pilot assembly. Where you should be placing your flame is above that point. Now with the gas valve knob turned to the Pilot marking, depress the know into the gas valve. Light the pilot. Check to see if it is lit and remain holding the knob in for 30 to 45 seconds. If the flame goes out as soon as you let out the knob, you will need to replace the thermocouple.

Oct 11, 2009 | Heating & Cooling

2 Answers

Intertherm furnace pilot won't light


if there are two wires to gas valve check voltage between these two wires while the furnace is going through a start up if you never get a call or voltage to valve your control board is bad, if you are getting voltage ,your valve is bad

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