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1997 Jeep Grand Cherokee with A/c problem. It only blows warm air even after the vehicle has warmed up and is being driven. This fan is still blowing strong. Any ideas?
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is your car warmed up? if it is already warm, probably you have a clogged heater core and/or airpocket in system.
to bleed airpocket, raise the front part and try to bleed air from bleeding screw. you will see bubbles if there are any after few minutes of idling.
if nothing helps you will understand that you need a new cabin heater or you need to try to clean debris out. be informed that this requires you t remove almost all parts of dash.
If the temeperature gauge says the engine is warm but the air is not warm until you drive it would most likely it would be the heater core partially clogged. Have it flushed.
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It is most likely a thermostat. As your car gets older the thermostat begins to lose its spring like properties and stays open all the time causing your car to never warm up.
If you can't tackle right away, start your car in the morning and let it run for about 15 minutes to warm up. Be sure to turn the heat on full blast and recirculate the air.
You have the blend doors problem which needs to be fixed. At jeep it is about £1300, by EDM in bicester it is £255 and maintains dual control. I would imagine the recirc dooe is or soon will go as well.
My 1999 limited does this. When i bought it off the guy he said that its because of some flap down by the passengers left foot. In mine the passenger air barely even blows because of this.
I agree, these vehicles have a problem with the blend doors and since the accuators hit the door when it opens and closes, it breaks the doors. and it's a huge job to replace them.
It's possible you are not getting enough coolant flow to your heater core. Try pulling the hoses off the core, blowing it out with air compressor, fill with water and blow out again. Try this about five times and see what happens. Alot of times these cores will plug up or have restricted flow. They will blow warm at low speed but it won't flow enough hot coolant through to stay hot on high blower speed.
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