When I select the setting on the dash heater to discharge from the dash and floor vents the cab a/c runs. This should only happen when a/c or defrost is selected. Could someone else try there coach and let me know if yours operates the same way? I have a spare heater control but don't want to create work for myself if I'm mistaken about the operation.
2013 Berkshire 390RB-60
toad - 2002 Jeep Wrangler Sport