A/C zone problem !?
#1
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2001 S Type ... my driver vents blow cold a/c air and the passenger side blows ambient or warm. already checked system pressures and all common 1st thoughts. also crisscross installed the air temp sensors in/under dash but same prob. blend doors all seem to be working. is there a seperate relay for the right side hidden somewhere or a hidden blend door. any help is appreciated !
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#2
Join Date: Sep 2008
Location: Damon /Houston, Texas
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you more than likely have a heater control valve leaking hot coolant into the passenger side heater core. The rubber plunger seal inside do fail, and the reason I say leaking, is cause if they were stuck open it wouldnt be luke warm. But HOT, there no way the AC can over 220* coolant temp to provide AC. To verify, clamp off the hetaer hoses it the engine bay so that not coolant goes through and see if that changes your issue to having AC on both sides. If it does then you need a DCCV(dual climate control valve)
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ide suspect bad evap temp sensor 1st. If its think(reads) that the evaporator is freezing it will shut off ac and depending on reading give heat. Its a cheap($30) easy part and common issue if you ant to diy without paying someone to try and duplicate and charge you
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Thanks for any help you can provide...
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#10
Join Date: Sep 2008
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driver side of the ac box about above your right thigh sitting it the seat. Its a white sensor and 2 wires. Pop it out with a small screwdriver to pop out of the case. The new 1 snaps in and reconnect the wire connector. I have changed 1 already today for a compressor short cycling. If you buy the new 1 youll easily identify it.
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