1998 Toyota Avalon Q&A

1998 Toyota Avalon Question: heat coming in to veh thru ac vents

i am getting heat thru the ac vents even with the thermostat down and all controls off i cannot stop the heat no matter what the controls are set on -
Answer 1
This sounds very much like a defective blend door. The blend door is what directs the air either over the heater core for heating or the a/c evaporator for cooling. It sounds like your blend door is stuck, for some reason in the heat mode. here are some shops for repair: https://repairpal.com/directory?address=76118&car_brand_names=Toyota -