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I can`t change the temp on the climate control on my 98 Explorer.No matter where you set the temp control it is always on full heat.Where is the problem,under the hood or in the dash? Thanks
Re: I can`t change the temp on the climate control on my...
Check the knob, they are known to crack. and when they do, you are just turning the knob, not the shaft. if the knob is good, the blend door actuator may be bad/stuck
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I am not aware of any obd codes that show up for what you are describing as a 024. The blend door actuator replacement is documented: http://www.markviii.org/LOD2/blend_door_repair.htm
and I would have to say that it is either bad or installed wrong.
Do you have Manual Climate Control System or Dual Automatic Temperature Control System ?
The temperature control switch:
is a potentiometer that outputs a variable voltage to the temperature blend door actuator to set the position of the temperature blend door.
initiates closing of the heater control valve. When set to full COOL, a lever on the temperature blend door pivot shaft depresses the pintle of the heater control valve vacuum switch. The heater control valve vacuum switch then applies vacuum to the heater control valve, closing off engine coolant flow to the heater core.
is serviced only with the climate control assembly.
You may have disturbed something when changing the actuator , the vacuum switch o vacuum hose .
If you have a fan that has different speed settings (1234, or low med high etc) and the only one that works is high - then the blower resistor pack has failed. If you have a climate control unit (where you just pick a temp you want) then the fan is controlled by the heating system and it sets fan speed. If you have climate control style try lowering the temp to a lower setting (current temp in vehicle) and see if fan slows down. If not then climate control unit or fan resistor bad. If dial type and you get nothing on lower settings (only high works like mentioned above) you need to change blower resistor. It is located under dash near the fan itself. Look for small unit bolted in duct near fan with wire plug going to it.
it sure could be that head unit. if you want to clean the unit it might help. disconnect the battery, pop the bezel off the radio and head unit remove the four 9/32" bolts that hold the unit in the dash, unplug the head unit and spray it with computer duster.
Could be a vacuum actuator problem. or just a vacuum leak, period. I have a Jeep that when it has a vac leak, the climate system defaults to the defrost, no matter what you set it at.
Temp. actuator stuck on heat , probably . Manual or automatic climate control . Electrically controlled temp actuator , or the door is stuck in heat side.
switch prolly not bad but you might wanna look into your heater control valve. valve not closing and letting the hot coolant fill your heat exchanger rather than recycling it back to the cooling system. The heat is over powering your a/c system and you're only getting a bit of cooling when you have the a/c on max. try it out
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