Question about Procom MN300TBA Heater

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How do i adjust or take out the thermocouple?

Need to adjust or change the thermocouple and dont know how to get it off

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I think a picture might help or even a short video. Some fireplaces are a little different and the back is closed up. Hard to view without removing A lot of screws. Just saying... Thanks

Posted on Dec 29, 2016

  • Paul Carew Dec 31, 2016

    Have a look on u tube


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Follow the copper wire to the gas valve undo the silver nut follow the thermocouple copper wire to the pilot undo the brass/ silver nut on the pilot replace thermocouple the same way.

Posted on Feb 22, 2012


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1 Answer

Can you adjust a thermocouple out on a propane wall heater?

Unless you're having a pressure issue(it's cold outside and may be affecting the regulator, which can be adjusted) it may just be a dirty pilot orifice. Turn off the heater and let it cool down. Take a can of compressed air (the can with the straw to clean keyboards) and blow out the dust inside the pilot assembly were the orifice is inside. You'll know if it's dirty, if the pilot flame is a lazy yellow, as it should be a crisp blue flame encompassing the thermocouple. The thermocouple is pretty much set in place in these heaters, unless it's loose and has fallen down, it's most likely the dirty orifice.

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most pilot's are not adjustable. if it is not staying lit, replace the thermocoupler.

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Pilot wont stay lit

check flame height perhaps the tip needs cleaned or flame adjusted .

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Water heater pilot light will not stay lit. changed the thermocouple, and still won't stay lit.

Hold the pilot button down for a full minute after it lights, then release. If this does not work then the thermocouple is not adjusted where the flame is heating it or you just have a faulty new thermocouple.

Sep 06, 2011 | Heating & Cooling

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My Williams heater Model # 435FXR, is not staying lit after I light the pilot. I changed the thermocouple (even tho I sensed it might not be that), and it still didn't work. I disconnected it again and...

You may have changed the thermocouple, but did you clean the pilot assembly? Dust & dirt can get pulled in and restrict the gas/air mixture. The "blue flame" needs to impinge on the thermocouple in order for it to stay lit. Or, couId there be a possible "crack" in the heat exchanger ?

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Changed the thermocouple and the waterheater starts up but shuts off a few seconds after

Iam guessing it is a fairly new hot water heater, when you put in the thermocoupler there should be some sensors there close by look for any carbon build up on them and any were else. if you know were the sensors are at just clean them off if you dont know were there at just do a good cleaning looking for carbon build up uninstall thermocoupler and reinstall and try again. if still not working check correct thermocoupler.

Aug 26, 2010 | Heating & Cooling

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Pilots stays lite but furnace burners will not turn on. when i turn the knob to on nothing happens

You more than likely need to change or adjust your thermocouple in the furnace. It is the part the pilot light heats up to let the furnace know it is safe to turn on the gas flow. These go bad over time and are fairly inexpensive and easy to change.

Nov 06, 2009 | Heating & Cooling

1 Answer

Propane will not flow through adjustment valve.

Your regulator has a thermocouple that senses the pilot before allowing the valve to open. It is sensitive to the miniscule amount of energy that is produced from the flame. Your thermocouple is bad or covered in soot and needs replacement/cleaning/adjustment.
Locate the thermocouple, and sometimes it can be cleaned with fine sandpaper. If it is not in the line of the pilot flame, make an adjustment. You cannot keep the pilot lit if the thermocouple does not sense the flame. It will go out when you release the button.
Clean or replace the thermocouple to fix.

Jan 16, 2009 | Blue Rhino Uniflame Patio Heater Stainless...

1 Answer

Pilot wont stay lit

I'm assuming that you changed the Thermocouple due to the fact that your posting here.

The First thing I can tell you is to bring the Thermocouple back to the store and exchange it for a new one. Not often but once in a while you can get a defective thermocouple even though it's brand new.

When you install the new one you may have to adjust the position of the probe so that it is directly in the path of the pilot, that is important. Make sure the nuts are snug.

Let me know how it turns out.

Dec 02, 2008 | Rheem 36" Water Heater Thermocouple Kit

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