I have a 1997 Toyota Camry and recently the air flow from the heater has become stuck on the front vents. Regardless of what setting I turn the switch to (defrost, floor, etc.) it doesn’t switch from the vents. It seemed to happen about the same time the thermostat died, which I had to replace (successfully I think).
I looked under the hood for a vacuum hose that might be disconnected (guessing) and under the dash for a wire that might have come loose or disconnected, but to no avail. I am guessing that some part on the heater has stopped working and needs replaced, but I haven’t a clue as to which one…hopefully one that won’t require pulling the dash off (that’s a pain).