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Matthew Coe

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  1. My AC would do this (hot air driver side, cold air passenger) and if I closed off driver side then the passenger side would blow hot. Eventually on long trips the passenger side would also blow hot even though the AC compressor was still cycling. If left on the compressor would eventually stop cycling. Turn off the car a wait a few hours and the AC would work perfectly again. My problem was a sticking expansion valve. Currently being fixed at the dealer for $566.
  2. Low pressure is in normal range of about 25-30 or so psi, high pressure though is way high at about 320-350 psi (should be more towards the 220-250 range). Therefore it's either a stuck expansion valve or bad condenser. It works fine for about 2 hours or so but then the high pressure switch cuts off the compressor until the condenser cools. Therefore letting the car sit a few hours and cool down brings down the pressure enough for it to start working again. It is not evaporator freeze up. I should know more by tomorrow, its at the shop and they are replacing the expansion valve. In 2014 they replaced the condenser after I hit a coyote on the interstate doing 70 mph. Of course the condenser took the brunt of the hit. They should have replaced the expansion valve when replacing the condenser but apparently they didn't. I'm betting that is the entire cause of all this. -Matt
  3. Yea, I'm leaning towards the Evaporator thermistor and re-evaluating possible evaporator freeze happening. It looks like that thermistor is a problem across a lot of different Ford models. It also seems like a complete pain in the ass to replace it. If done at Ford probably $$$$. -Matt
  4. Plenty of water drips, and I even checked the evaporator drain for debris and it is clear. I cleaned the cabin air filter (which is the screen type) and it didn't help at all. Both fans do run when MAX A/C is on...now whether or not they are running when the AC system has been running for over 3 hours I will need to check. That's something I haven't looked at when it is having the problem. It could be that they are cutting out for some reason after a long period of use. Condenser is clean and actually only 2 years old as it was replaced after I hit a coyote on the interstate. I need to check the system refrigerant but I have a feeling it will be OK since the system works perfectly fine except when used longer than about 3 hours continuously. Thanks for the input though! -Matt
  5. Thanks, probably not my issue unfortuately. The SE has manual controls so I don't think it has an HVAC control module, although I could be wrong. I'm also starting to rule out evaporator freeze over since the volume of air coming through the vents is unchanged only the temperature. The fact that the AC compressor is still cycling but I'm not getting cold air is strange to me. Maybe blend door actuators are failing after a few hours of use?? -Matt
  6. My AC will begin to blow warm air on trips of about 3 hours or longer. It starts out fine, perfectly cold air. After a few hours the driver side will feel warmer than passenger side. Eventually it will become warm, and the passenger side will also start to become warm to the point where there is no AC at all. The AC compressor is still on and cycling when this happens. Once the car sits for a few hours the AC works perfectly again. My thought is AC Evaporator freeze over. I checked the cabin air filter and cleaned it with no better results. I also just checked the evaporator drain and it is clear. Would low refrigerant cause this problem, or something else? I guess I need to check refrigerant pressure next. Any thoughts? -Matt 2012 Edge SE
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