Pentair Mastertemp 250 temperature setting

[Jthomp]

Hi All.
After setting the temperature to the desired level, heater comes on as expected and shuts off when temperature reached. At some point after(I haven’t been able to pinpoint when) the temperature setting reverts to 70-degrees (I believe the default temp). No error messages on the display.
Any thoughts?

 

[ajw22]

Welcome to TFP.

Is the heater connected to any automation with the fireman’s switch?

Could be a flaky membrane keypad.

 

[Jthomp]

Thanks.
There is no automation or remote controls connected to heater