Pentair Minimax NT Problems?

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Pentair Minimax NT Problems?

Postby TxAg » Sat 30 Mar, 2013 06:06

It sounds like you aren't getting enough flow through the heater in spa mode and it is tripping from over temperature. I would check the system pressure to see if it is unusually high in spa mode to see if there is restricted flow.

My blower motor went out and I decided to replace the whole thing so I'm parting out the rest of the unit if anyone wants some used mini max nt parts.
TxAg
 

Pentair Minimax NT Problems?

Postby joe v » Sat 27 Apr, 2013 10:02

ndllana wrote:I ahve a Pentair minimax NT . The heater starts and heats for about 30 minutes or so then just stops. It will kick back on several times, then fi nally stops and shows and e05 messaage. Anyone have a fix to this.

Thsi is the second time this has happened since I bought it back in 2003. The first time Pentair came out and replaced the ignition module and DDTC controls.



possible fan failure. leet system run for a few min the put your hand on the fan motor. if its very hot to the touch it going bad and needs to be replaced.
joe v
 

Pentair Minimax NT Problems?

Postby Pool User » Sat 25 May, 2013 13:48

To: Not a heater repair guy

Excellent post! Really helped me save a lot of money. I was able to pick-up a run capacitor at the local Electric Supply outlet and the blower now runs better than new!

Turns out the old capacitor was leaking oil.

Thank-you again.
Pool User
 

Pentair Minimax NT Problems?

Postby Kluk » Sat 03 Aug, 2013 07:54

My mini max is kicking the breaker after fan runs for about 30 sec
Kluk
 

Pentair Minimax Staring problem repair

Postby Napa Eric » Sat 26 Oct, 2013 19:07

I have a roughly 7 year old Pentair Minimax. It is used for both the pool and spa. It became gradually harder and harder to start until finally it would not start at all. It would try several times, and I could smell gas, but it just wouldn't light. I found this thread and saw the suggestion about cleaning the jets. I bought some wire brushes but then decided a more complete disassembly was warranted. I first verified that the blower was running, the ignitor was getting hot and I knew that I had gas. I turned off the gas, turned off the power and then pulled the gas jet assembly. Lo and behold, when I looked back up into the gas jets, most of the jets had cocoons, or spider silk in them... this include the jet closest to the ignitor. I cut the end off of a Q-Tip and cleaned out the jets. After reassembly everything works fine. The silk was fairly tenacious and I'm not certain that it could be properly cleaned without being able to look into the jets. In my unit I needed 1/4 and 3/8 box wrenches and sockets to remove the gas jet assembly. After the jet assembly was loose, I rotated it and the valve/regulator for access and cleaning of the jets.
Napa Eric
 

Pentair Minimax NT Problems?

Postby lilpuppy99 » Mon 16 Dec, 2013 18:19

Where do I purchase this run capacitor? Is there a certain model I need. Is it available on Amazon?

My spool has a Pentair Minimax NT and the pool guy just replaced the blower fan. The heater now turns on and begins heating the water for about 10 minutes, but once the temperature gets to 66 degrees, the gas/flame/heat cut off. The fan stays blowing, but now the air coming from the top of the heater is cool air. After a few minutes, an E04 code pops up, but eventually the heater kicks back on and works fine until it gets to 66 degrees, where it cuts back off. I'll also get an E05 code from time to time. I have the pool and spa temps both set at 104 degrees. What should I do? It seems to me that there is some sensor or something causing the heater to turn off. I don't know much about this, I'm just renting the place. The pool guy has been trying to fix this for almost 3 weeks and I still cant get the heat past 66 degrees. I know so far they have replaced an ignitor(looked similar to my gas grill ignitor), rewired a bunch of stuff, and replaced the fan blower motor.

Any help would be appreciated. Thanks.
lilpuppy99
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Pentair Minimax NT Problems?

Postby ChrisL » Thu 09 Jan, 2014 23:49

This is the original poster of the run cap advice (Not a heater repair guy), I had to change ID because my account was locked out.

The run capacitor replacement has made my Pentair minimax run without issue since my first post (Dec 2011). No more E04s, E05s, doesn't work after a rain, works sometimes, starts sometimes or other flakey electrical behavior issues since the original post. The fan "ran" for a long time with the bad cap, but was blasting so much noise all over the place that the controller threw those error codes around till I fixed it. About a month after replacing, the step down transformer to the control panel blew, maybe because of the cap also, so I replaced that also. (that one was easy, no LEDs lit, and everything was working fine for a month or so before it gave out, so I know the cap fixed the cause of the E codes)

If you need to replace the cap, just turn off power, remove the silver air vent housing and screws, lift the top plastic cover remove the existing cap, and take the part with you to match. It should be marked with a capacitance and voltage, and is called a "run" capacitor.

It is $10 or less, and literally takes 15 minutes more than the time needed to get the part in hand.

I got mine on line, but I also saw people go to Home Depot, HVAC (Heating Ventilation Air Conditioning) places, etc.

I wouldn't do this first for obvious mechanical, gas, or flow issues (ie banging noises, no gas, etc) but would try it FIRST for overall flaky electrical behavior.

One thing I just noticed is that you replaced the motor, which should have come with a new cap. This may not be the issue with your spa, unless the motor was a used one.
ChrisL
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Pentair Minimax NT Problems?

Postby ChrisL » Thu 09 Jan, 2014 23:54

Not a heater repair guy wrote:I'll give everyone having weird intermittent behavior with their Pentair Minmax heater a hint up front, before the long story below. REPLACE THE RUN CAPACITOR ON THE FAN MOTOR! It is a $10 to $20 part that can be replaced in 15 minutes. Just waste $20 and do it first and see if it fixes all your problems.

Turn off breakers, confirm no power to unit, remove 6 screws on top that hold the fan cover down, pull the cover up and off, and remove and replace the oval run capacitor. You need a 5MFD, 370 V or greater oval capacitor, available on the internet or most HVAC supply stores.

E04, EO5, fan eventually not running, ignitor module flashing once, twice, control panel eventual not powering up were all caused by the capacitor slowly degrading and taking out the AC transformer and low voltage power to the ignition module and DDTC controller board.

The next post gets the long story.....


The value for my heater was in original post above, but make sure yours is the same when you remove it.
ChrisL
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