I was troubleshooting my Mastertemp 300 and changing all the usual sensors and the control board. I checked the thermal limiter and found the thermostat and the spring were gone. I’m thinking the spring must have rusted and the thermostat must be in the manifold. My question is, how far can that Dang thing go? It must be causing a problem because now I’m getting a PS LED light telling me it’s the pools pressure, which make sense as the thermostat could be causing a blockage. Thanks guys for any help.
Thermal limiter was missing.
- Thread starter chrger1970
- Start date
- Jul 21, 2013
- 65,826
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
You need to remove the manifold, open it up, and see what parts you can find. It is 8 bolts to remove. Get the O ring kit to replace all the O rings while you have it open.
PS LED is telling that there is not enough flow to close the pressure switch, usually a dirty filter or clogged pump. Sometimes the thermal regulator is removed for testing, the heater works, and it is not replaced. Parts are too large to get into the heat exchanger and would be very visible just looking into the port.