last year my membrane stopped working and the temp down button would no function. I replaced the membrane and it works this year for a few weeks. Now it will start and ignite and I can feel the heat coming off the exhaust but after about 2-3 minutes the temperature begins to drop until it hits 65. I replacement the thermistor and the thermal regulator. I hooked up a new OEM membrane and the same thing occurred. Any help on what is causing this to occur or what needs to be replaced? Thank you
Mastertemp 250
- Thread starter Jbennett106
- Start date
-
- Tags
- mastertemp pentair
- Jul 21, 2013
- 52,497
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Welcome to TFP.
For a test replace the thermistor with a 10K resistor.
If the temperature stays at 76F then replace the thermistor.
If the temperature drops you probably need to check the wiring from the thermistor to the board, and maybe replace the board.
For a test replace the thermistor with a 10K resistor.
If the temperature stays at 76F then replace the thermistor.
If the temperature drops you probably need to check the wiring from the thermistor to the board, and maybe replace the board.