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Replacement knob part #MB16002 for Pro-Com heater model #MN300HGA

I have a Pro-Com heater model #MN300HGA and need a replacement knob part #MB16002. Where can I find one? btw, the knob has a serious design flaw in that there is a flat metal piece that fits into a slot on the base of the knob that allows you to light and adjust the temperature when the knob is depressed. It is made so that it both comes out of the slot and bends too easily so the knob doesn't work properly and therefore makes the heater unusable. I really just need the little metal piece that fits in the slot and not the entire knob but that doesn't seem to be a separate part. Any suggestions/help/ways to fix or order would be much appreciated.

Posted by Anonymous on


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Posted on Jan 02, 2017

  • 98 Answers

SOURCE: need to find replacement knobs for gas control

Need to know model and make

Posted on Dec 23, 2007

  • 2 Answers

SOURCE: ProCom blueflame heater pilot light difficult to light

Holding the button down enables gas to go to the pilot. When it lights you will see the flame touching two rod like devices. The small one is the igniter. The second one is a thermocouple. A thermocouple is a bimetalic device (2 disimilar metals) that when heated produce a small curren, this current in turns keeps the valve open for the gas to flow when you let go of the button. This is a safety feature. If the flame goes out on the pilot the thermocouiple cools and closed the valve shutting off the gas so you don't go boom! It sounds like the thermocouiple is bad or missaligned. If it is missaligned it will take longer to get hot enough to hold the valve open. Another thought would be the flame is not shooting out far enough (not enough gas pressure, clogged oriface on pilot(previous writer, leak but you get the idea. In my manual it had a picture of how the flame should look hitting the thermocouple. Good luck. My problem is I assumed that the regulator on my construction heater was the correct size. Maybe not. I have not had any luck getting the pilot to light at all. I hope I have not damaged the internal regulator.

Posted on Jan 17, 2009

  • 188 Answers

SOURCE: Control knob

You should be able to get a new knob from Master Parts. You can contact them online at or by calling 800-446-1446.

Posted on Jul 08, 2009

  • 2557 Answers

SOURCE: Nothern Hyd sold me a Natural Gass only Pro Com

nothern hyd should suppy this part they should also tell you as this is there mistake

Posted on Mar 09, 2010

  • 23 Answers

SOURCE: I just installed a brand

Is the pilot light a nice blue colour, is it noisey only at start up. Could be air mixture on pilot and pressures not set correctly

Posted on Dec 15, 2010

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