No power to my Pentair Mastertemp Heater 400- 460736

Chrisplus4

Member
Jun 9, 2020
17
College Station, TX
Pool Size
21500
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
I am not getting power on my control panel on my Mastertemp. I have checked the fuse and it looks good. I also made sure power was coming into the unit. I think it is the control board or the membrane. anyone know the best way to test which one it is? I have a good voltmeter.
 

Chrisplus4

Member
Jun 9, 2020
17
College Station, TX
Pool Size
21500
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Yes it is automation. I was reading another thread with similar issues and when I bypassed the panel the heater kicked on.
 

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Poolbreh

In The Industry
Jul 31, 2021
300
San Diego
I can’t see yourautomation in signature. In your automation Make sure the desired temp is above the current water temp. Make sure heat source is “heater” for pool/spa which ever one you are trying to heat. If automation has demand to heat it will send signal to heater to turn on. After demand is validated by automation click pool or spa button on heater doesn’t matter which and set to max and leave it. Verify it will continue to turn on and off through automation settings.
 
Last edited:

LindyAZ

New member
Nov 14, 2021
3
Arizona
Pool Size
20000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-20
Hey Chris... I have similar issue. When you say you learned that the Mastertemp was disconnected from the Intellicenter-- did you have a wire loose inside the Intellicenter panel?

I've done some of the same debug in the Mastertemp box-- I'm getting 120v to the box and the fuse checks out OK. The heater panel just doesn't turn on when I turn on Spa mode. Even in service mode from my Easytouch panel, it won't work. I haven't opened up my Easytouch control panel. Here's a pic of my Mastertemp box.
 

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