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Miimax NT heater. I get a HI error code???? - Pentair Minimax NT Heater

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Hi limits check gas pressure and burn tubes

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SOURCE: Minimax NT Heater: Heater wont light Err error code. Reset and nothin...

You should try changing out the thermistor first. That is the likely culprit. Not too bad of a repair. The main pcb could also cause this, but i would r and r the thermistor first. HTH

Posted on May 19, 2010

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3 Answers

Heater has been running and heating, but getting E02 error and HI


sounds like a water flow issue check your bypass valves check for clogged filter or thermal regulator ,or manifold bypass

May 17, 2014 | Pentair Minimax NT Heater

1 Answer

Error codes


You have a bad thermistor. The heater thinks that water temp is over 114 degrees.

Aug 14, 2013 | Pentair Minimax NT Heater

1 Answer

Heater will not come on and there is no error code. The power light is on.


Is there any lights on? If there are and still no error code, just blinking lights. Check the thermistor. I had a similar problem. Heater had power, lights were on SW was green but no error code and would not fire up. I replaced the thermistor. It took me all of 5 minutes and heater fired up and is working great.

Jun 19, 2011 | Pentair Minimax NT Heater

2 Answers

Minimax NT Heater: Heater wont light Err error code. Reset and nothin...


You should try changing out the thermistor first. That is the likely culprit. Not too bad of a repair. The main pcb could also cause this, but i would r and r the thermistor first. HTH

May 17, 2010 | Pentair Minimax NT Heater

1 Answer

Error code "04"( won't light)


Error code "04" is for fan failure. If you have lost your owners manual you can download one here. http://www.pentairpool.com/pdfs/MiniMaxNTOM.pdf Page 28 has all of the error codes. Rob

Apr 22, 2010 | Pentair Minimax NT Heater

1 Answer

Wont run,reads "hi", no error code. pool temp is 46F


HI is a code for Water temp over 114. If this is what you have the temp sensor has gone bad. Or thermister. It will be a small tube that slides into the water manifold with two wires coming from it. A white nut sets it in place unscrew this pull out follow the wires to unplug then slip the new one in. This should fix your problem. Good luck.

Feb 26, 2010 | Pentair Minimax NT Heater

1 Answer

What does error EO4 mean on a NT Mini Max Propane heater?


This is a fan falure code, it will mean your fan is out or the air pressure switch has a problem. Ether in the switch or the hose going to it. You can also check where the hose hooks up to the fan housing to see if anything is stuck in the port.

Feb 14, 2010 | Pentair Minimax NT Heater

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