About once every 2 weeks I will open the spa and see the OH error and an indication the water temp is 108 but it is nowhere near that. I did replace the circulation pump figuring it may have stopped running and created an over heat condition in the heating element. This did not help the problem. Now looking for advice on the temperature sensor(s) that may have gone bad. The new circulation pump is the redesigned Laing E-10. Any suggestions?