Question about Pentair Minimax NT Heater

1 Answer

E04 fan failure reading on thermo screen, heater turns on then off no heat, no blower...

Posted by on


1 Answer

  • 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.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 83 Answers

There is one thing that may correct this issue. You can try to reset the heater. What you will need to do is open the right hand side door and look for the POWER toggle switch, turn that off. Then turn off the Circuit Breaker that goes to the heater. Wait about 15 to 20 minutes, then reverse the order- circuit breaker on, then heater on. Try and start the heater.

If the EO4 code comes up again, look on the backside of the display panel for the diagnostic lights. If there is a problem with the heater, there will be a RED light next to some letters. That will indicate what is causing the issue with the heater.

If you do not have a manual, you can find on online at the following link:

Hope this helps!

Posted on Jul 13, 2009


1 Suggested Answer

  • 2 Answers

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

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

E04 minimax error code

Since you said you replaced the fan, and flow valve. Did you re-install the pressure switch correctly? it will look something like attached image. This is more than likely the cause if you did not replace with the fan or reinstall correctly... or it might have been the cause in the first place...

Aug 04, 2014 | Pentair Minimax NT Heater

1 Answer

Code E04 comes up after it cly see ing light up

blower failure. either the blower isn't producing enough pressure, or the air proving switch is faulty, or you have a blockage within the vent or air switch tubing, or if the blower isn't coming on you have a failed relay within the circ board

May 25, 2014 | Pentair Minimax NT Heater

1 Answer

Pentair heater e04

fan failure. either issue with air pressure switch, blower isnt producing enough pressure, or blockage within venting

Dec 30, 2013 | Pentair Minimax NT Heater

2 Answers

I have a Pentair pool heater. E04 code

should be the coolant fan thats in front of the raidiator

May 07, 2010 | 2005 Mazda Tribute

1 Answer

Ihave a goodman GMPN furnace. The blower will not work, even in the fan on position. If I put in heat position, the burners ignite, but goes out. The module blinks 4 times showing open limit. The blower...

Maybe not! there is a limit switch that has opened not allowing power to pass and start the furnace. You will need to tale a Ohm meter and follow the wires thru any safety switch. In your case, it may be the thermo-disc near or over the burner box. Jump it out to test it. Now why is your blower not working (which could have been the reason why the thermo-disc opened)? Once you find which safety switch is open and you have jumped it out, take a jumper wire and jump between the R and G terminals on the circuit board. This should start your fan. If not, either the fan is stuck, the fan motor is bad or hopefully noy; the circuit board is bad.

Jan 18, 2010 | Goodman GMS90703BXA Heater

1 Answer

I have a pentair minmax nt, natural gas heater. I am getting the E04 message. I know its a fan failure but I hear the fan fine. When I start it, and look at all the LED's in the back, all are lit up except...

This problem is most likely caused by a damaged vac tube or bad vac switch. Check those first. The hose/tube may have been damaged, especially if you have any mice running around. It's most likely the vacuum tube, the switch is not as likely to fail but it's wise to make sure both are serviceable.

Oct 27, 2009 | Pentair Minimax NT Heater

1 Answer

I have E04 error code, fan runs but no ignition or gas or gas smell

troubleshot vaccum switch determined it was operational (Use Pentair's website for service instructions on the switch) Fan speed too slow due to worn out motor. Replacing blower assembly

Aug 01, 2009 | Pentair Minimax NT Heater

2 Answers

Hi. We have a hotpoint washer dryer aquarius wd64

REMEMBER: when checking the resistance ensure that all wiring is disconnected from testing points!

Remove the top cover of the washing machine, you'll see about a foot size aluminum casing of the heater itself. Using a multimeter set on resistance (ohms) check the resistance between two welded pins (heating element) The readings should be roughly fom 0 to 26 ohms. If there's no readings you'll need to replace heating element, othervise check the resistance of thermo-fuse wich is located between those two welded heater pins. one of the wires connects heating element and thermo-fuse directly. The readings should be around 0 ohms, if no reading just replace the thermo-fuse.

Lets end at this point for now, as replacements thermo fuse solves the problem in most cases.

Please update me about your success, If unfortunately it didn't helped, just say and we'll find the solution!

Good luck

Mar 10, 2009 | Hotpoint Aquarius WD640 Front Load...

1 Answer

Blower stays on with new themostat

Check to see if there is a short between the green wire and the red wire. Green is the fan control wire for AC. Sounds like some wires may be touching. How did the old t-stat get fried?

Jan 02, 2009 | Honeywell Programmable Thermostat Heater

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

869 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pentair Pool & Spa Experts

Jay Finke
Jay Finke

Level 3 Expert

1389 Answers

Bill Jordan

Level 2 Expert

373 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8841 Answers

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

Answer questions

Manuals & User Guides