poprocksncoke

Everything works fine in the morning but in the afternoon when its hot and Im driving on the highway car starts overheating and a/c will start blowing warm air. Checked the coolant and its fine. Water pump is only a year old. What else could cause this?

157dB

Define 'overheating'.

Bad A/C clutch.
Bad ClimateControl Module.
Loss of freon from damaged condensor.
Bad stepper motors in the plenum.
A multitude of things.

But not the coolant level or the water pump...
Thats a heater thing, not an A/C thing.

Sum goud reedin

poprocksncoke

In this case overheating is just the temp gauge goes up and a/c blows warm air

poprocksncoke

Also there has been a clicking under the dash when a/c is turned on, could something under there be the problem?

poprocksncoke

Help please

wayne613

No, likely this is a separate issue, an actuator going south.

He gave you the service manual link to trouble-shoot.
Can you verify the A/C compressor is actually on during this?
Fan come on?
etc....

wayne613

In addition, afraid he is wrong on the coolant/water pump front. Your A/C will be disabled by the PCM if it senses your coolant/engine temp is excessive.

http://iihs.net/fsm/?dir=335&viewfil...nditioning.pdf
Assuming this is the problem, and it is still a large assumption, then:
I would first look to the fan,
flushing the system,
then if it still occurs (overheating), looking at the pump/flow again.

Hopefully, not a head-gasket issue...

If it's only occuring at high speed, I'd check your oil level first of all. After that, if the coolant is good, you've likely got some kind of flow issue(thermostat, blockage in radiator, air, or a weak pump), radiator isn't getting enough air for some reason, or a head-gasket is failing. Those are the only things I can think of that would cause this (without MIL/codes thrown).

157dB

learn sumtin new al de time

thanks for that disable info

never had an AC problem, never read that AC section 100%