So my front AC is working fine. The rear AC however blows hot air and then from time to time it will blow cold air but not for longer then 30 minutes then the hot air starts again. Any ideas what might be wrong or how I would start to diagnose the problem?
I bought a 2002 Expedition, Ac blows barley cold air and sometimes hot air from all vents (front and rear). Where do I start troubleshooting. Already checked the low end ac port with gauge and it read freon was full.
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