Erratic Temp Readings on Jandy LXi400 heater


May 20, 2020
Simsbury, CT
Hi Everyone - encountering some oddness with my Jandy LXi400 heater. Have seen the temp reading vary wildly in short time frames after it's been running for some time (not the typical temp fluctuation you see at the initial start).

I had the heater running at least 15 mins. The initial temp displayed was correct, in the low 70's. But after some time the display showed the temp reading 50 degrees, obviously incorrect. I turned the heater on and off a few times and it finally began to report temps aligned with the spa thermometer.

Anyone seen this?