5.9 V-8 The AC/heat blower will only turn on at the highest setting and then it does not blow cold air with AC button engaged. However, the rear climate controls all work fine and as long as the front blower motor is on high the rear controls are blowing ice cold air. Checked the fuse under the hood and on the driver side access panel.
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The compressor is going out. The only time the compressor actually runs is when the clutch is engaged, the rest of the time the pulley acts as an idler pulley and just free wheels. I would suggest replacing the compressor and the accumulator.
ok, missed the part about the rear ac working, the part that causes this is called the air temperature control blend door actuator motor, it is an electric motor driven gear drive that moves the plastic door inside the air ducking to mix or shut off the hot or cold air from the ac evaporator core or the heater core, you will need to replace it.
i changed the resistor and then took out the blower because it was not working. i got the blower to... (More) i changed the resistor and then took out the blower because it was not working. i got the blower to work now it is not blowing cold air. i even added r-134a to the system and the compressor started to cycle on and off. does anyone know how to solve this problem
The rear vent system has a separate heater core/blower system. heater core could be plugged up or the coolant lines going to rear heater core are plugged. could also be low coolant/faulty water pump not producing enough pressure, or air in the cooling system which will need to be bled if so.