water temperature probe

hello.   we have an inground pool  with pentair equipment.  we had a terrific storm last night and coincidentally our temperature reading now for the water is at 153 degrees. (it’s really at about 80)  the air temperature reading is correct.  the pool is 13 years old, but i’m assuming that the termperature probe for the water either went bad, or something happened to it during the power surges we were getting.  does anyone know how to fix this or have had it happen and know how to fix it or replace the probe.   i sent an email to pentair but haven’t heard from them yet.

any help would be great.

thanks