» » »

Toyota Q&A

Ask Your Question

2003 Toyota Matrix Question: heater problems

 

Question

tbrannan619, 1.8L 4 Cylinder, Wilmer, AL, January 11, 2010, 16:33
 Rookie

heater only blows cold air, all the flaps seem to be working.

1 Answer
Flag This
  • Answer #1

    patrick mannion from Greg Solow's Engine Room, January 12, 2010, 17:48
    Profile_thumbnail
     Master

    I am not sure but there should be a heater control valve usually in the engine compartment at the rear on the firewall with two hoses attached to it and a mechanical cable that attaches to the heater control knob or lever inside the car. Get a friend to operate the lever inside the car and see if the valve fully open out side in the engine compartment. If its low heater output perhaps the cooling system thermostat has failed.

    Reply
    Flag This