My whole HVAC system seems to be sick these days.
AC just died, fan only works when speed switch is on 4, etc...
But another issue that suddenly propped up is that when I turn the temp control knob, I hear a distinct change of pitch from the air vents, as if it was opening and closing some air valves, but it makes no difference to the temperature of the incoming air.
Does this automatically indicate either an obstruction in the heater core or a dead temp control mixer unit?
The car runs really well with no heating issues.
Thanks for any help.
Bo
AC just died, fan only works when speed switch is on 4, etc...
But another issue that suddenly propped up is that when I turn the temp control knob, I hear a distinct change of pitch from the air vents, as if it was opening and closing some air valves, but it makes no difference to the temperature of the incoming air.
Does this automatically indicate either an obstruction in the heater core or a dead temp control mixer unit?
The car runs really well with no heating issues.
Thanks for any help.
Bo
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