I know this is a Truck site but hope you may help.
The dual heater only gets warm on the pass side. Driver side has no heat at all. The pass side gets warm but not hot like it should.
fan, defog, vent and floor controls works fine
Engine temp is good at 190
thoughts?
got to be one of these and dont want to shotgun stuff to figure this out. are any of these more common to fail?
Heater valve Damper blend doors AC/Heater control
haven't checkd vacuum line yet
thanks