Compool cp 3800 display shows error 1. I've replaced the water sensor and still have the same issue. Is there a way to override the error 1 code in order to get the heater to work?
You can disconnect the fireman's switch from the Compool board and operate the heater from its control panel.
For the water sensor, test its resistance with a multimeter. Compare the resistance you get with the chart below. If the sensor is giving the correct resistance then the problem is probably in your board.
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