I have a 2007 Camry CE and the heat does not work. It is the 4 cylinder and the climate control is the manual one. The blower works, the air control works, but when I rotate the dial to max hot still blows cold. I checked that the AC compressor is not cycling, the inlet and outlet to the heater core is hot, I see the blend door arm on the passenger side move when the temp dial is turned. I cannot see the actuator way up high in the dash on the air box and not sure if it is involved in the hot/cold choice.

Pretty obvious the blower air is not passing through the heater core. I just have no idea where to check next. Is there a blend door higher up that decides hot/cold in conjunction with the one I saw move on the bottom of the HVAC housing? Wish I had a service manual right about now!

Thanks,
--Bill

 

Air mix servo motor is under dash, drivers side of A/C unit. A/C unit is under center part of dash on the drivers side of blower unit.

Make sure the heater control valve is working.