2 Answers

Pentair Master Temp Heater is not heating and reading 126

Posted by on


2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    Visited the website for 60 consecutive days.

  • Expert
  • 121 Answers

Is it reading 126 all the time or only when you first start it up? will the fan run?

Posted on May 03, 2017

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

  • Contributor
  • 1 Answer

Definitely bad thermistor Pentair reps have seen this happen a lot. Lick finger and touch the two contacts where the thermistor plugs in it should fire up if it's a bad thermistor. If you do an ohm reading you'll find that the ohms do not correlate with the temperature that's displayed. I just trouble shot one and I'm getting 51.2 ohms which equates to 10 - 20 degrees Fahrenheit which is obviously not what is being displayed because it's 126 which is a common number that's displayed when a thermistor is not reading properly

Posted on Apr 21, 2017


6 Suggested Answers

  • 2 Answers

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

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.
Good luck!

Posted on Jan 02, 2017

  • 128 Answers

SOURCE: Pentair Minimax Nt heater wont turn on and heat,

Bad thermistor. The yellow wire that plugs into the control board. Lick finger and touch prongs. Heater should come on

Posted on Aug 30, 2009

  • 10 Answers

SOURCE: Pump problems?

Their can be a number of things.. Is the pump priming. Hopefully it did prime. what usually happens after running for awhile, with no cool water coming in. The water inside the pump basket starts to heat up, then the tubing turns to brownish on the input side of pump and exhaust side. (you could have air leaking in throught the input side, which could result in the pump never priming) Or if it is priming and no pressure (can mean your empellar is clogged up)

Posted on Mar 11, 2009

  • 1 Answer

SOURCE: Pentair Minimax Nt heater wont turn on and heat, "err" message

temp sensor get the new one with yellow wires.should do the trick.

Posted on Jun 05, 2009

  • 1 Answer

SOURCE: Pentair pool heater reads HI

thermister needs to be replaced. follow small yellow wires off control board to front header and thats where the thermister goes

Posted on Jun 22, 2009

  • 15 Answers

SOURCE: Pentair Minimax NT 400 heater. fan keeps coming

Sounds like the controller is the problem. This is the circuit board that has the display and controls on it. You can swing that panel open and try tapping on the white plastic cover the controller is under that. This might get the fan relay to release but you will have to replace the controller it will stick again

Posted on Jun 23, 2009

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

When turning on power display reads 128 then error code r 13, after this it say's spa on but the temp reads 126 and the water temp is only about 68 so the heater never comes on.

This is not an error code. 128 r13 is the normal programming or software version for your model. you need to press the spa on button again, make sure the temp set point is higher then the actual water temperature

Mar 07, 2016 | Pentair Master Temp 400K BTU Natural Gas...

1 Answer

Pentair heater will not light

This could be a temperature sensor issue, however you should open the panel and look at the ignition control module, there is a red light that will flash and based on the number of flashes it may tell you more information. Open the panel the. Try to fire the heater and watch the light and see which flashing sequence it gives you, post back with that information and we may be able to figure it out

Dec 06, 2013 | Pentair MASTER TEMP HEATER 400 000 BTU NG...

1 Answer

Temp reading 126 degrees

replace temp sensor or check manual bypass

Aug 21, 2013 | Pentair Mastertemp Heater

1 Answer

Brand spankin' new Master temp 400 NG,won't heat past 77° spa is set at 101°,pool at 88°, does heater pool/spa temps have to be manually set to max(104 i assume) for intellie touch to...

if the intellitouch is properly wired to the heater, it should all be automatic and you should be able to control it all from the remote.

there should be three wires connected to the circuit board behind the manual control on the heater (labeled "POOL", "SPA", "Common"). Those are the wires that the intellitouch uses to communicate with the heater.

You can download manuals from the Pentair website.

Aug 24, 2010 | Pentair MASTER TEMP HEATER 400 000 BTU NG...

Not finding what you are looking for?

Related Topics:

1,599 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pentair Pool & Spa Experts

Jay Finke
Jay Finke

Level 3 Expert

1383 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8832 Answers

Brad Brown

Level 3 Expert

16852 Answers

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

Answer questions

Manuals & User Guides