Most heater control valve are attached to the heater hose/s. I look for yours but not listed having one. The question is what's wrong?
December, 2, 2007 AT 1:47 PM
The heater is blowing cold air. I have the manual which in troubleshooting section says it would be the thermostat, the coolant level, or the heater control valve. I have eliminated the first two. I bought the part at parts store but don't see the same part under the hood. Any suggestions about where it would be?
December, 2, 2007 AT 2:41 PM
Try warming the Vehicle, then carefully feel the heater hoses, are they both hot? If one is cooler than the other, You need to flush the core, or a replacement job on the heater core.
It's possible that the temperature blend door is stuck. The shaft it swings on is metal, and over time they tend to rust and binde up, operated the temp knob while you look for or feel for the actuator that moves that door, some actuators ar vacuum operated, some electrical. Either these motors, called servo motors can go bad or the above mentioned issue! If the shaft is frozen, try a small drill bit at the base of the shaft, drill thru the plastic and spray some white lithium grease in there, if you can move it by hand, so much the better! Work it back and forth till it moves freely!
Try this press off and floor at the same time, then within 2 seconds press auto, if it comes up with a fault code post it here.
December, 2, 2007 AT 3:04 PM
Merlin2021 I did as you prescribed, pushing the buttons that you mentioned. There was a pause with a little light going around. Then I heard a clicking noise in the dash. Then the numbers 024 and 025 began flashing. Wait it gets better. Then I turned off the car and turned it back on and the heater started working. AWESOME! Now I don't know if the problem is fixed, but hopefully this information will give you a better idea of what my problem is/was. Thanks man!
December, 2, 2007 AT 4:25 PM
Hers the in depth testing in case you need it...
September, 30, 2009 AT 11:56 AM
Try this press off and floor at the same time, then within 2 seconds press auto, if it comes up with a fault code post it here.[/Quote]
I did just what MilkandCookies did, and it worked for me too! Merlin2021 you are awesome. My heater woks again!
September, 30, 2009 AT 12:37 PM
Thank you, and thanks for the point!
October, 13, 2009 AT 8:47 PM
My car may be different, pressed the off floor at the same time, then auto; codes 24 then 16 came up. Whats up?
October, 16, 2009 AT 2:22 PM
What make model and year is it?
October, 16, 2009 AT 11:15 PM
It is a 99 Town car 175000 mi. It has new intake with aluminum coolant passage, and new thermostat. Heater doesnt blow hot. I depressed the off and floor on the heater control and it flashed the #24 then #16. Any help appreciated, anymore info you need to help me I will try to get. Thanks.