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Phil 7/31/2011

2007 Dodge Nitro R/T 6 Cyl 4.00L

Preventive Maintenance

Why does my AC not work unless I am going down the road?

It seems my AC coolness goes away when I am in traffic or at a stop light. I have had it recharged and have the correct amount of Coolant in it.

1 Answer


Jimm 7/31/2011

An a/c system with insufficient cool air may have one, or more of, these problems;
* low refrigerant charge; check system for leaks
* slipping compressor clutch
* loose drive belt
* clogged condensor
* clogged evaporator
* defective evaporator control valve
* faulty expansion valve
* faulty fixed orifice tube
* clogged receiver-drier screen
* clogged accumulator-drier filter
* moisture or air in system
* refrigerant overcharge
* blend door out of adjustment
May also check the a/c relay and the a/c compressor clutch engagement; wiring, any in-line fuse - to make sure the compressor is working.


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