# Rear AC **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [July 7, 2008, 1:09am UTC](https://community.cartalk.com/t/rear-ac/16316 "2008-07-07T01:09:15Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Larry\_Howland](https://avatars.discourse-cdn.com/v4/letter/l/51bf81/32.png) [@Larry\_Howland](https://community.cartalk.com/u/Larry_Howland)\ **Post date:** [July 7, 2008, 1:09am UTC](https://community.cartalk.com/t/rear-ac/16316/1 "2008-07-07T01:09:15Z")
My rear AC blows hot air when front AC is turned on. The front AC blows cold air. ---
**Author:** ![crankwalk5](https://avatars.discourse-cdn.com/v4/letter/c/3e96dc/32.png) [@crankwalk5](https://community.cartalk.com/u/crankwalk5)\ **Post date:** [July 7, 2008, 1:19am UTC](https://community.cartalk.com/t/rear-ac/16316/2 "2008-07-07T01:19:01Z")
747 heavy.? cessna? tahoe? john deere? check the charge. ---
**Author:** ![NYBo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nybo/32/17281_2.png) [@NYBo](https://community.cartalk.com/u/NYBo)\ **Post date:** [July 7, 2008, 1:24am UTC](https://community.cartalk.com/t/rear-ac/16316/3 "2008-07-07T01:24:08Z")
All vehicles know of with rear air except giant RVs use the same compressor and condenser for both the front and rear units. Therefore, those items are okay, and the refrigerant lines and rear evaporator are also intact. If not, the front a/c wouldn’t blow cold air. Check the mechanism that selects between hot and cold air. Telling us what kind of vehicle it is would help us give you more detailed info. ---
**Author:** ![oldschool](https://avatars.discourse-cdn.com/v4/letter/o/e19adc/32.png) [@oldschool](https://community.cartalk.com/u/oldschool)\ **Post date:** [July 7, 2008, 3:04am UTC](https://community.cartalk.com/t/rear-ac/16316/4 "2008-07-07T03:04:00Z")
Rear AC’s typically use expansion valves for metering. I will make my WAG and say expansion valve.I know we dont have the model. ---
**Author:** ![cappy208](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cappy208/32/31_2.png) [@cappy208](https://community.cartalk.com/u/cappy208)\ **Post date:** [July 10, 2008, 12:16pm UTC](https://community.cartalk.com/t/rear-ac/16316/5 "2008-07-10T12:16:41Z")
bump