Pentair Mastertemp 250 E05 Error

[Dave224]

Moved from HERE

I have the same heater and I do get an E05 code. This happened after about 16 hours of rain. I feel the rain must be the cause. Before I tear into it, could it dry out and fix itself or do I need to drain/clear something first? The exhaust temp jumps around under 110 deg. then the heater shuts down after about 45 sec.

 

[ajw22]

Open up the heater and check the wiring to the Stack Flue Sensor.

Pentair MasterTemp Heaters - Further Reading

www.troublefreepool.com

 

[Dave224]

Thanks for the reply. I disconnected the wires to the SFS sensor and removed it. It looked fine. Couldn’t get my multimeter to do a good ohm test. Reinstalled the sensor and hooked up the wires. It has been working normal now for 2 hours. Exhaust temp. is 295.