Pool Pilot Dig-220 Tri-sensor faulty temperature reading

[mpmatthe]

I have a 6 year old system and the temperature reading is 28 F when the actual is about 90 F. I have inspected the tri-sensor and am looking for advice on how to test to see if the tri-sensor is bad or the circuit board. Thanks Thomas

 

[Bama Rambler]

Can't help you with the testing but if that's the only thing wrong, it's most likely the tri-sensor.

 

[Poolsean]

Here you go.