Todd B

I have a V200-18–E3XB module that uses PT100 sensors for temperature readings. It’s connected to a display module and used to control boiler water temperature. It’s about 5 years old. Recently the PT100 temp sensors have started to have erratic readings fluctuating by 15-20 degrees or more. I never had this issue until recently. I tried new PT100 sensors but problem still exists. Could the V200 module be the problem? Is there any way to check the V200 module?