Question about Procom ML300HGA Heater

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Pilot Lught I'm having problems keeping the pilot light going on initial start up. The pilot lights fine but it doesn't make any difference where the control knob is, it (the pilot) will not stay lit. I've tried "fudging" a little each way on the setting, still no luck - the pilot simply won't stay lit when I release it after initial warm up of the pilot. Has anyone else had this problem and what was your corrective action??

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The theropile is connected to tha safty valve .the switch inside is magnetic and can stick. Light pilot and try tapping on it with handle of a screwdriver. Otherwise the valve can be replaced .

Posted on Jan 31, 2015

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When you light the pilot you hold down the knob for the coupler to get hot at this time don't let go of the knob turn it to on position as quickly as you can. If that doesn't fix it you need to replace the thermal coupler. try that

Posted on Mar 01, 2009

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1 Answer

I have a reznor heater in my garage I have to keep lighting the pilot it wont stay lit.


i have an ole reznor in my garage been workiing for ten + years no problems , mine is gas , the pilot light does go out after it switches to main burner like ten seconds later , but does light back up when thermostat shuts main off ( i had to go look to make sure) not a real big flame maybe like an inch or so , has a spoon shaped air shield around it , maybe yoours is missing ?

Mar 02, 2015 | Heating & Cooling

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I have a Williams model # 2509612 wall heater. I replaced the thermocouple, cleaned the pilot light gas line, but the pilot light keeps going out after cycling. Any suggestions?


Remove your pilot assembly and remove the aluminum gas line going to it. Be careful when you take this off because there is an orifice inside of it that may or may not fall out. If it don`t fall out remove it. In the top of are a couple really small holes. Make sure they are clean. Also again clean the pilot hood of all debris. Reassemble everything and it should work fine. If not buy a replacement pilot assembly because I have had some that i couldn`t get clean enough not matter what I tried. Doesn`t happen often but does happen. New assembly always fixes it but a good cleaning usually does it.

Feb 03, 2011 | Williams 2509612 Ceramic Mid-Size Heater

1 Answer

I have a PROCOM model ML300TBA, two years old. Here is my problem: Pilot lights fine. Burner lights fine. When I go back the next morning, often times it is out. Burner and pilot are out. It will...


You could try cleaning up the thermocouple with steel wool. Some manufacturers call this a flame generator as well. Any how make sure it is clean and positioned in the top center of the pilot light for best signal. This is only speculation as these are common problems that will arise on heaters in general. This also turns the gas to the burners and pilot light so thats why to start here first. Hope this helps you out.

Dec 23, 2010 | Procom ML300TBA Heater

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THE flame from the pilot should shoot past the thermo-couple and heat this up and make a small amount of mili- amps to prove the pilot light is lit. ..So if the flame doesn,t go past the thermo-couple it won, make mili-amps or its tme to change out the thermo-couple, They only cost lest than $8:00 and you can change it!

Dec 22, 2009 | Williams 3003622 Ceramic Wall Mounted...

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My pilot light keeps going out on my comfort glow infrared propane heater what could be making it go out?


The thermocoupler is faulty. It is that bulb that sits i the pilot flame. It controls the gas valve so you won't get any gas if the pilot goes out.. So, the thermocoupler needs to be replaced. Inexpensive and easy fix. Good Luck _Ned_

Oct 19, 2009 | Heating & Cooling

5 Answers

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You pilot ignator is plugged.I take a small wire and run it in the hole every year and I also Blow the heaters out real well with air.THis has always worked far me.I need a phone number or email address to Pro Com because i'm having problems with a new one i just bought and I can't find the papework.Could you pleas eif you have this info email it to me
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jaycalk@yahoo.com

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1 Answer

Pilot light keep going out will sometime stay on 3 hours then go


Great, if you are not skilled in working on this type of appliance the best thing you can do is to call a professional out. Be careful in picking a service company, there are a lot of dishonest people out there. Try to get a reference from somebody in the construction trade that you trust.

The Next question is do you have carbon monoxide detectors in your house?
Click the blue word Carbon monoxide site for more information. It could save you and your family's life.

If I can be of more assistance, please post back.
Do not hit accept if you can not leave 100% good feedback. Customer satisfaction is very important to me.
Thank You for your time.

Accurate Joe

Nov 27, 2008 | Coleman Propane Forced Air Heater...

2 Answers

Unable To Keep Pilot Light Lit!


I have a Williams top vent gravity wall furnace (model 5009622) and I had the same problem. I had to take the cover off the furnace -- screw on top and two at the bottom (open the access door and there is one screw on each side) to get to the reset button for the vent safety shutoff system. On my furnace it's on the left side toward the top of the unit. I pressed the little red reset button and it's been working ever since. If your furnace is properly installed and doesn't have bird's nest in the chimney, it should work fine. Good luck!

Mar 04, 2007 | Williams 2509612 Ceramic Mid-Size Heater

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