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    Rheem M266A Pool Heater Troubleshooting

    I have a 10 year old model P-M266A-EN-C pool heater for my salt in ground liner pool. At pool start up this year at first heater operation it ran for a couple hours and then gave a CLK message. While not actually being a HVAC guy or a pool guy, I was a dealership auto mechanic back in the 80s...