Question about Pentair MiniMax 100 Aboveground 100,000 BTU Propane Gas Electronic Heater

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The heater work for about four hours this year and then turned off now the pilot will light but the burners do not light J

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Thermocouple is likely full of carbon deposits.

You'll need to clean it, or replace it - if that does not work.

Use some fine-grit sandpaper or steel wool to try to clean it up and re-try.

Thanks!

Posted on May 27, 2011

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Rfn30ta gas heater dont stay lid


The most common problem with these types of heaters is dust build up in the pilot. If your pilot light is mostly a yellow flame you need to blow out the pilot of dust.

Turn off the unit. Remove the cover to expose the pilot. You should find two small holes about an inch or two below the tip of the pilot. Those holes are for mixing oxygen into the gas prior to it lighting. Blow those out with a can of compressed air and you may as well blow out the large burner also with the can of air. Wipe down everything with a damp cloth to remove additional dust.

Sometimes the pilot will light and stay lit, but when the burners turn on the flame moves slightly and pulls the flame away from the thermocouple. Either way this is a good idea to do every year or two on your heater.

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If the main burner going off is putting out the pilot then you either have a bad pilot line, (Crimped tubing, dirty pilot orifice), or the thermocouple is on the way out. I just went through this with my Quadrafire & it turned out that I had a partially crimped line to the pilot. But my thermocouple was questionable too.

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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.

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Either the pilot light orfice is dirty, and you will need to pull it out and clean it, or the thermocouple is bad. If the pilot goes out as soon as you let the button go then it is most likely the thermocouple. If the pilot stays lit for a few days or hours then you will need to clean the pilot orfice, heres how:
1 turn off the gas supply
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3 unhook the pilot supply line it is usually next to the main burner line
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After a few minutes of burner heating the water, gas shuts off.


A couple of things to check:

If possible, remove the pilot gas assembly and clean the gas jet and thermocouple - they can get carboned up and stop working properly. Make sure the pilot flame and deflector is aimed properly and making the thermocouple glow red hot. If the problem persists, you may want to replace the thermocouple and also check the propane regulator.

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1 Answer

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