Progressive EMS-HW50C unit
We have Porgressive EMS-HW50C about 1.5 years old and hardwired at the dealership into our new camper. Yesterday about 1:00 a.m. we heard this loud tapping noise. We thought we had a large rat in ou...
Forum Discussion
I believe there are spring loaded contact relays inside the box. When ours started humming, PI provided a new contact board to us as a replacement. Maybe yours is going bad.
