Question about Procom ML300HGA Heater
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.
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Posted on Jan 02, 2017
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
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