HELP- Pentair mastertemp 250 not turning on at unit

geb724

Member
Feb 14, 2020
9
Port St Lucie, FL
Pool Size
8000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-30
4yo Pentair mastertemp 250 ng no longer turns on at unit. The only way i can turn it on is using the screenlogic app on my phone. any suggestions/ideas?
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
43,985
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Welcome to the forum!

When the heater is connected to a Pentair automation (Easytouch?) the firemans switch controls the heater operation. To my knowledge if the automation is controlling the heater, you cannot override that on the heater control panel itself.

Let's ask @JamesW if I am off base here.
 

JamesW

TFP Expert
Mar 2, 2011
27,690
The fireman's switch controls the heater.

If the fireman's switch is closed, you should be able to use the heater from the heater control panel.

If not, the membrane pad might be bad.
 
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