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Your AC evaporator could be freezing up, causing low air flow. If you live in a high humidity area, pulling in outside air is very hard on the AC system. When you start your truck first time of the day, pull in outside air enough to cool off the inside of the truck, then, place settings on MAX COOL and REC, this setting will recirculate the inside air in the truck that already has the moisture taken out of it. This makes your AC system work to the best it can. Now, if it's a noticable fan motor problem, you might have a blower resistor problem. Good luck, Gary
Replace the blower motor resister,this is the speeds for the blower motor,it is located very near the blower motor,and is mounted on the blower box,and it actually goes inside the box,to keep it cool.The reason for it`s failure is the blower motor,even though the blower motor sounds,and runs good,it is drawing too many amps.If this was at all helpful,please rate,thank you.
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I think you have a "variable speed resistor" problem, it's overheating. It's an electronic device usually located near or attached to the AC motor blower that controls the fan speed. This is a common problem with aging AC blowers with electronic controls.
Hi under the hood the hoses going into the fire wall from the engine on one of the hose you have a valve which is open and close by a solenoid when it's defective it stays open check and close the valve
if it never comes out face vents then u have a door actuator motor not working ,,if it jumps around letting off throttle then it is a vacuum problem vacuum under hood going into the firewall needs to be checked,,and vacuum resovoir might have hole in it if it is vacuum cantrol,,,the reason for warm and cald temp changes is probley not enough air flow threw radiator and condenser this will rise the high side and low side heating up the freon and it cant cool the freon down enogh to get col air ,electic fan not coming on would cause this or fan clutch (if it has one ) would also cause this .look for fan relay not working ,also did u change accumilator and dryer? ,also may have blockage in condenser i hope i shed some light on the problem
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