Question about Pentair Minimax NT Heater

1 Answer

Minimax NT cycles on, Flame stays on about one second then shuts off. It resets itself then cycles on again. About one second later flame goes out again. It keeps going thru this cycle. There are no error codes and the LED stays off. What is the cause of this problem? Please help Bill I had the exact same problem last year. The technician simply removed the and cleaned the gas nozzles. Even tough I have not been heating the pool I fire the heater every month for about ten minutes. Last week when I tried to fire the heater once more, the same problem happened again. The unit ignites for about 2 or 3 seconds and shuts off. The cycle repeat without stopping and with no error code. I tried to clean the nozzles but it did not work this time. Is this something simple I can fix myself or should I call a technician again?

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

I had the same problem and it was the ignition mod after i replaced that it ran fine again .

Posted on Jun 01, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Furnace won't stay lit. Intertherm Model M2RC-080A-16BN. Ignightor glows, flame starts and after a few seconds the flame shuts off. Then it starts the cycle again. It goes thru this cycle a fe


It sounds like the flame sensor is bad. If thats not the case you may need to replace the control board. You should make sure the flame sensor is directly into the flame.

Nov 20, 2014 | Intertherm Heating & Cooling

1 Answer

Pentair minimax nt heater


its not sensing flame you have to look at the burners make sure all of them light. Many times spiders wil get into the gas jets, you can use a number 12 solid copper wire to insert it into the gas jet you will see it ,the flame sensor burner is not having a good flame

Apr 12, 2014 | Pentair Minimax NT Heater

1 Answer

The igniter comes on, lights the flame but the flame only stays on for about 5 seconds and then the flame shuts off. About 1 minute or two later this cycle repeats itself.


There's a heat sensor that's in the path of the flame. It's supposed to detect when the flame is lit properly so you don't fill your house with unburned gas.

I'd bet that sensor has gone south, or maybe the wire going to it.

What brand/model is it? A diagram and parts listing might come in handy.

Dec 31, 2010 | Dryers

1 Answer

I have a problem where the heater ignites easily, stays lit for 30 seconds, then turns off, then kicks back up in 30 seconds. Burners look great? Not sure what could be wrong?


If you have a pilot their will be a flame sensor that's part of it. If this is a glow plug start it will be a probe that goes through the fire wall and is just above the burners. When you get flame the electrons align so that you will get a signal back at the ignition control that will let teg heater run. If it dosn't get a signal it shuts down so you don't get a build up of gas. Then it reset's and tries again. What your describing is a bad sensor or wire. Could be carbon build up on the sensor. If you can't find any problems with these you may have a bad ignition control box. First I would check the wire, connectors and probe itself.

Oct 09, 2010 | Pentair Minimax Ch 400,000 Btu Propane...

1 Answer

Startup cycle goes fine. All lights(power, pressure, thermostat, and heater) sequence correctly. After ignition, heater fires up(seen through viewing window) but then blows out 15 seconds later when fan...


If you are getting fire and have an eo5 this is a reading for no flame so it is not reading the flame. What you probally have is small spider webs in your burner orfaces. You will need to pull the burners out and with a small wire or the like clear the gas orfaces going to the burners. These little webs can divert the gas to the main burners and keep it from the burner that reads the flame. Your heater will come on with a big woosh as the gas needs to come from other burners to fire. I hope this helps. Good luck

Nov 24, 2009 | Pentair MINIMAX NT TSI IGNITER

1 Answer

Minimax NT Heater will not fire. Everything about the unit seems to be running fine but it simply will not fire. The blower continues to run even though it does not light. No error codes are shown....


Check the limit switch. It may be stuck open. TAP the cover with a screwdriver. If the unit starts, the limit will be the problem. You should also check the flame sensor. The unit may try to start but the flame sensor doesn't see the flame, the unit shuts off..Good luck...Lee

Nov 05, 2009 | Pentair Minimax NT Heater

1 Answer

Minimax NT 400 TSI Heater problem


I bet that your 15 seconds of flame are more like 7 seconds. The time is very important. If the flame is not recognized after a specific time the valve is shut off. If the flame sensor is GOING bad but still make some rectification then you may get the issue you are having. I would start with the flame sensor and work from there.

May 03, 2017 | Pentair MINIMAX NT TSI IGNITER

1 Answer

Flame wont stay lit


Sounds like a flame sensor problem. The board is not getting the proper signal from the flame sensor so it thinks the burner did not light and shuts the gas supply off. It keeps the blower operating to ensure that no gas is accumulated in the burner area. I suggest you contact a local mechanical contractor to service your heater.

Jun 23, 2009 | Pentair Minimax NT Heater

Not finding what you are looking for?
Pentair Minimax NT Heater Logo

Related Topics:

481 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pentair Pool & Spa Experts

Pj Kiley
Pj Kiley

Level 1 Expert

21 Answers

Jay Finke
Jay Finke

Level 3 Expert

1338 Answers

Bill Jordan

Level 2 Expert

372 Answers

Are you a Pentair Pool and Spa Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...