Ac gets cold then hot then cold again.
2 things come to mind the first is are you stepping on the gas to accelerate when it happens this will be caused by a vacuum leak somewhere in the emissions or under the dash/ second are you standing still and you feel the air get hot if this is the case your cooling system is running hot and the heat is transferring to your a/c condenser and making it hot reducing the cooling effect of the Freon because it is getting hot itself
SOURCE: 2005 Dodge Grand Caravan
99% chance it is the blower resister located behind glove box. Squeeze glove box in and pull out.
The resistor is right behind it, dealer part cost less then $20.
Dodge has had this problem for over ten years and until recently did nothing. Now they combine fuse with resistor, suppose that will correct it?
SOURCE: 2003 dodge caravan air vents will not change position?
I HAD THE SAME PROB WITH MINE I REPLACED THE HEATER CONTROL PANEL & IT FIXED IT
SOURCE: Dodge Ram AC not blowing cold
By pass both pressure switches one at a time with small wire or a paper clip. If comperssor kicks on replace the swich that you bypassed.
if not it could be the fan clutch ot the compressor. Compressor runs about $400.00
SOURCE: 2003 dodge grand caravan ac recharge
you should be adding the 134a to the system the low pressure switch is doing its job by not allowing the compressor to kick on, it wont kick on until there is enough 134a in the system to be above the preset pressure for the low pressure switch.
SOURCE: 2001 dodge ram 1500 ac is blowing hot air instead of cold
Your A/C sounds like it needs to be vacuumed
out and then recharged to factory specs. That
should solve the problem.
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