Hi,
When this happens, are there any other lights affected or is it only the HVAC control display?
I attached a picture below (pic 1) that shows all interior panels illumination. The second pic shows relays related to the unit. I have never experienced this type of issue, but lets give it a try. First, locate the relays related to the HVAC. Next, since you hear a clicking, it does sound like a relay, so see if you can feel the click from one of the relays indicated.
Let me know what you find.
Joe
Images (Click to make bigger)
SPONSORED LINKS
Friday, April 30th, 2021 AT 4:36 PM