Venmar air exchanger issue
For some reason the HVAC started doing this a few days ago. It starts automatically and the wall control's whole screen blinks and I cant do anything. The only fix Ive found is to unplug and replug the unit. Happened for the first time back in December and that fixed the problem. Now however, that solution seems to work for a day or two and the hvac will start doing it again. Anything else I can try before calling in a tech?