Question about Pentair 150k Minimax Ch Ng Mv Heater

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My pentair minimax 150 has a pilot light but will not ignite. I have checked the thermostats and have jumpered the sensors. I have good water flow. I am thinking it is the gas valve or thermocouple. I am getting millivolts out of the thermocouple, though. Can you assist?

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  • Pentair Master
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Check for loose wires

Posted on Oct 07, 2017


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SOURCE: Pentair minimax nt just replaced ingnitor module

This means the air switch is bad.

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SOURCE: Pentair Minimax 250M

how many times it blink will tell you what is wrong check at the codes. unplug thermostat check fo homs 10 k around is fine at 80 degrees pressure switch require a by pass but DO NOT RUN THE HEATER WITH A BY PASS ANY CONTROL!!!!

Posted on Sep 19, 2009

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Posted on Oct 19, 2009

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SOURCE: the pilot light on my pentair minimax ch 250m will

More than likley this is a bad thermocouple and will need a new pilot assembly. But it can also be a short in the safty circut, rat chewed wires or a bad gas valve. It may be best to get a repairman involved. Or you can just drop each switch out of line and jump past them to check. But part changeing can get pricy. Good luck.

Posted on Jun 27, 2010

  • 46 Answers

SOURCE: Pentair Minimax CH Propane Millivolt Ignition

If you are firing, and then going off and getting an E05, your igniter is to blame. It may be glowing but it's getting weak. The diagnostic goes further but that is usually the fix.. With inactivity, the igniter is always to blame. You really need to fire it off weekly to make it reliable and make sure that your heater is serviced at least one time a year to keep all the internal components operating as designed.

  • Manufacturer Part #: 471291
  • Description: Propane pilot assembly for heaters with millivolt ignition.
  • Retail Cost: Approximately $65.00

Posted on Dec 08, 2010

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1 Answer

I have a 8 year old pentair minimax 200ch that does not start but pilot liights up

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Pentair Minimax 250M

how many times it blink will tell you what is wrong check at the codes. unplug thermostat check fo homs 10 k around is fine at 80 degrees pressure switch require a by pass but DO NOT RUN THE HEATER WITH A BY PASS ANY CONTROL!!!!

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Purex Triton Minimax 400 pool/spa heater not igniting

This sounds like you have a problem with your pilot. You can check this with a small mirror to see if their is a spark when you turn it on. If you have any soot build up on the pilot that will stop the spark and keep it from lighting also. If you have a short on your pilot wire this could be the problem also. I hope this helps, good luck.


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