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Billy, Technician
Category: Pool and Spa
Satisfied Customers: 22517
Experience:  Licensed in Hydronics and Boilers
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Rheem M5350TI-E heat pump, water too hot. Digital display

Customer Question

Rheem M5350TI-E heat pump, water too hot. Digital display temp is 72.5F but the water is at 100F
Submitted: 1 year ago.
Category: Pool and Spa
Expert:  Billy replied 1 year ago.

Does the unit heat properly and shut off but displays wrong temp...or will not heat to set point accurately?

Customer: replied 1 year ago.
The unit heats properly. The setpoint is at 90F and the board temp display shows a water temp of 72F but the water is at 100F. If we move the setpoint to a lower setting like 70F the unit shuts off. We took the wts out and it looks kind of short for the well. Maybe the water flow is not reaching the sensor enough and that is why the erratic readout. Or the thermistor is good but the resistance value is the wrong ohms. We plug the wts hole with another wts and run the unit with the unit sensor off the well. We rub it to see if the temp change in the display and it did change.
Expert:  Billy replied 1 year ago.

You have a bad sensor....the resistance is no longer what it should be.

Replace the sensor it should be back to normal

Customer: replied 1 year ago.
That was our diagnostic too. We changed the sensor but still have the same readout.
Expert:  Billy replied 1 year ago.

then something in the connection or board is causing a draw...are connections clean?

Customer: replied 1 year ago.
We could not pinpoint the problem and just for trial and error we replace the board, switch the comm wires and switch the wts with the suction line sensor. No luck. Only remaining idea is to trace all the wiring with the wiring diagram to see if there is a wire in thr wrong place.
Customer: replied 1 year ago.
Sir, we don't think it is fair to charge us because you did not answer our question. To say: "then something in the connection or board is causing a draw" is not an appropiate answer to solve the problem. You are guessing. We hope you are honest and issue a refund to our credit card.

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