Sta-Rite SR200HD Pool Heater Issue


New member
Aug 12, 2020
Buffalo, NY
I received a E05 code on my SR200HD pool heater which is the Stack Flue Sensor. Replaced the sensor. Heater ran for about 6 hours and up to temp. The next time the heater started up, it shut down and the Service Heater light came on. The SFS LED on the back of the circuit board was lit. I replaced the stack flue sensor again. Same thing. It ran until up to temp. Next time it fired up, same result. The E05 error code is NOT showing. Only the LED on the circuit board. My system is 14 years old. What could be causing the SFS to go bad? Or is it something else? Does the heat exchanger need to be descaled?


TFP Expert
Mar 2, 2011
E05 is usually overheating or open SFS.

When the heater starts, press and hold the "pool on" button until the stack flue temperature is displayed on the display.
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