Question about Explorer Appliances GRQ10 Top Freezer Refrigerator

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Thermocouple Availability and Source

I have a GRQ10 that has a termocouple that is bad. It has an output voltage of 23 mv and won't hold the gas valve on. I tried a 'fits-all' thermocouple but the gas valve end on the explorer has a smaller nut. Where can I find a thermocouple to fit? I have tried various rv places but they don't have one long enough (36"). I can't seem to locate the manufacturer. I think they are out of business. Any help would be appreciated.

Posted by hskb on


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Sorry we do not sell nor do we have any means to locate parts of any kind.

Posted on Jul 05, 2017


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Bill Gorham

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SOURCE: I have a 1999 explorer

I also have a Explorer grq 15 propane fridge made by Unique. It is also a 1999 model . We have had problems since new.I recently found the problem.There is a 3/16 copper line that goes from the incoming propane inlet valve to the thermostat on the bottom of the fridge.When this fridge was constructed,the copper pipe was cut, and a furrel and nut were put on the pipe.No one cleaned out the inside of the pipe after the cut was made.It was 1/3 plugged .I took a drill bit that fit in the good end of the pipe, and cleaned out the partially plugged end.The fridge works perfectly now.13 years of agravation over with.You must lay the fridge on its side or top to get at this pipe.Hope this helps others.

Posted on Jul 25, 2012


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Furnice problem I have a Heil Furnice it will not stay lit at pilot. I cleaned the orifist and change the thermalcouple and having same problem. Not sure what to do next.

Make sure the thermocouple is inserted correctly into the pilot flame. At least 3/4" of the thermocouple end should glow red when inserted properly. You must depress the knob in the 'pilot' position for at least 30 seconds for the thermocouple to generate enough electricity for it to do its job. Its job is to hold in the safety coil inside the gas valve that you are bypassing by holding down the knob. There are four possibilities that come to mind immediately: 1) Your new thermocouple is bad 2) It is not sufficiently tightened into the gas valve 3) The safety coil inside the gas valve is bad necessitating the replacement of the gas valve itself.

NOW..... if there are two little wires coming out of the side of the hole where you have to screw in the thermocouple, those two wires connect to an 'overtemp' safety switch and are wired in series with the thermocouple. So #4) The 'overtemp' (limit) switch could be open causing the thermocouple voltage to not get TO the safety coil.

A note of interest....the thermocouple voltage generated is less than one low as 150 to 250 millivolts so you will not be able to read the voltage with a standard el cheapo meter from Harbor Freight.

Dec 26, 2014 | Heating & Cooling

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Pilot light not staying on

A standing pilot is on a gas furnace, unless you have an air conditioning system that uses ammonia as the refrigerant and has a gas flame, as this is improbable I will assume this is in the AC section by accident.
The pilot solenoid is energized by the "thermocouple", a thermocouple creates 30mv electrical power by a temperature differential existing across the tip of the thermocouple.
Inside the tip are 2 dissimilar metals.
Any junction of dissimilar metals creates a voltage potential in relation to temperature. Specific metals have a predictable
and repeatable relationship to temperature gradient and voltage.
By the thermocouple's tip being impinged by the pilot flame, creating a temperature differential across the thermocouple.
Id a thermocouples end is fully impinged it will have no temperature differential across the tip and drop output of any voltage, some try baking a thermocouple into submission, this is counter productive.
1000 MV = 1 volt ,
a AAA battery is 1.5 volts
So 30 MV is a very small amount of power and is easily interrupted by design should the pilot flame not heat the thermocouple meaning no flame exists and the pilot solenoid will close .
When we manually depress & hold the pilot knob in to light the pilot assembly this allows the pilot flame to be established, after 30-60 seconds we can then stop depressing the pilot knob and the pilot flame will remain on by the 30 MV energizing the pilot valves coil holding it open magnetically, like old scrap yards on TV used to show a crane with a huge electro magnet that they power up to grab the metal and kill the power to drop the metal, this is what is happening in a relay or contactor etc.
If the pilot will not stay lit with a new thermo couple, and the thermo couple is properly set in the pilot flame as earlier described, then a gas valve will be required.

Jun 06, 2014 | Heating & Cooling

1 Answer

Burnham boiler pilot light goes out when thermostat shuts it down

That unit uses a thermocouple 30mv or a pilot generator of 750 mv if the thermostat is a remote type and not integral to the gas valve.
A thermocouple or pilot generator makes power due to a temperature differential across the tip of the generator, if too much is impinged by the flame the generator gets hot across the entire tip, dropping power output.
You likely need a new thermocouple they are about $15 and easily replaced.

Nov 01, 2013 | Williams 3003622 Ceramic Wall Mounted...

1 Answer

I have a Dayton 3E290 wall heater that was installed new 30 years ago. The pilot light started to extinguish a few years ago. Gradually this began to occur more frequently. I've changed the...

The pilot assembly may need cleaned out and the orifice cleaned, also the gas valve may need to be replaced, to check for proper voltage from the thermocouple you need a flame source and it takes a meter that can register DC milliamps, and should be 350 to 750 millivolts. Heat the thermocouple with the pilot or other flame source and check, if OK, gas valve is weak.

Nov 02, 2011 | Dayton Gas Furnace Heater

1 Answer

How do I change the termocouple on an older Dayton furnace

Locate the gas valve,there will be three lines coming off the bottom and going into the burner compartment. The center one is the largest and is the main gas feed to burner. The one on right is usually silver and about 1/4 inch in diameter. It is the pilot feed line. The third is usually coppercolored ,this is the line for the thermocouple. You can trace thermocouple line down into burner comparment. The tip of the thermoucople usually slips into a friction fit mounted right in front of pilot burner.Slip old thermocouple out of holder and unscrew fitting from the bottom of gas valve. Install new thermocouple into pilot burner assembly,make sure thermocouple is fully seated and in direct line of pilot flame. screw fitting into bottom of gas valve. Set gas valve control to pilot,depress pilot button and light pilot. Hold pilot button down for about 2 mins.Tip of thermocouple should be cherry red. If it'snot try to reposition so thermocouple is more covered by pilot flame. Relese pilot button and if pilot stays on rotate gas valve control to on.Hope this helps you. Yhanks

Nov 20, 2010 | Dayton Gas Furnace Heater

1 Answer

Pilot won't light

Thermocouple, if the pilot comes on while holding down the gas switch/button and goes out when you release to turn on, the thermocouple is bad.

Jul 26, 2010 | Lite On Laars Lite 2 Heaters: 250,000BTU...

1 Answer

CBN30T,DESA, pilot lights, but flames out when the burner comes on.. burner stays on a few seconds and shuts off due to cold thermo-couple. pilot flame seems to jump up and disconnect from the jet, as if...


Oct 13, 2009 | Desa International GWP30T Heater

1 Answer

Pilot light won't stay lit.

Ensure that gas is getting to the pilot , or you may have a devective pressure regulator.
If gas is getting to pilot and pilot is turning off, then you need to replace the thermocouple.
The thermocouple function is to turn off the gas if there is not enough temperature, so to prevent gas leaks if the pilot light goes off.
Near to the pilot light there should a part similar to a small metal tube directly in contact with the flame. Thermocouple is wired back to the gas valve.
When the pilot is on, and temperature is steady, the thermocouple will generate a small voltage that will keep the gas safety valve open. In case the pilot light goes off, the thermocouple will cause the valve to close. When you hold the pilot light button , the thermocouple will normally reach enough temp to keep valve open.
If the termocouple is faulty, it will turn off as soon as you release the igniter button.
Replacing thermocouple is an easy repair.

Call the number listed on the owners documentation to get the replacement part.

Sep 05, 2009 | Imperial IFS40 Deep Fryer

1 Answer

Pilot light does light , but as soon as you release the gas knob it goes out

Hi there. You must continue to hold the knob in for at least 30 seconds before releasing. If the pilot still goes out, the "thermocouple" is bad. It's the little tube in the pilot flame. To replace, remove the main burner assembly/pilot. You can get a thermocouple at any hardware store. Ask questions while you are there.

Jul 12, 2009 | Lite On Laars Lite 2 Heaters: 250,000BTU...

1 Answer

Thermocouple replacement

Maybe you need to approach it differently. Why do you assume you have a bad thermocouple each time? If its because the whole flame goes out and you have to relite it, a lot of things can cause that.
1 ohm out a new thermocouple and record the ohms reading (read tween the center LEAD looking area on the end going into the gas valve and the outer shell (copper colored cover) If its a MV type controls it will have 2 wire ends. With the flame running now check the MV-DC on the same area, as the resistance. Yes you will need 2 hands extra for holding the flame on. It wont stay on without being hooked up. Typically you need 400MV for a thermocouple and 600 is the stahdardf output on a generator with wire leads depending on which you have. If your below these ranges You need to blow out the piulot area with compressed air and retry it. You should get an increase in the milli volts after cleaning because now the flame will hit the pilot or thermocouple or generator as designed and dust was causing it to be lazy and not get enough voltage back to the gas valve to stay on.

Now this is assuming you have the correct pilot orfice and its not too small like with an LP orfice installed on a NG system. The pressures are differant and the hole is way smaller on LP.

This is a really common problem with multi changeouts of thermocouples. Dusty Pilot burners. y policy has always been to blow it out first after observing the type and kind of flame. Then reexamine it after cleaning it out.

If this helps you please rate me as high as you can. If I have not given you enough information please post back so I can better aquaint myself with you problem. Good Luck!

Mar 23, 2009 | Cozy (W352E) Heater

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