# Heater and AC

**URL:** <https://community.cartalk.com/t/heater-and-ac/46836>\
**Category:** Maintenance/Repairs\
**Tags:** deville, cadillac\
**Created:** [March 29, 2010, 7:50pm UTC](https://community.cartalk.com/t/heater-and-ac/46836 "2010-03-29T19:50:24Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![caddy92](https://avatars.discourse-cdn.com/v4/letter/c/9d8465/32.png) [@caddy92](https://community.cartalk.com/u/caddy92)\
**Post date:** [March 29, 2010, 7:50pm UTC](https://community.cartalk.com/t/heater-and-ac/46836/1 "2010-03-29T19:50:24Z")

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My ac sounds like it’s on high but it just puffs out air ---- when I put the heater on defrost – on the right side of windshield it comes out hot and on the drivers side cold ---- when I just have the heat on – it only comes out of the floor and not the vents and it only puffs out luke warm — this is a 92 Cadillac Sedan Deville with electronic climate control---- I can’t choose anything but temp (auto or defrost!)

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**Author:** ![circuitsmith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/circuitsmith/32/40376_2.png) [@circuitsmith](https://community.cartalk.com/u/circuitsmith)\
**Post date:** [March 30, 2010, 1:03am UTC](https://community.cartalk.com/t/heater-and-ac/46836/2 "2010-03-30T01:03:12Z")

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Probably some kind of control module that’s bad.  
Time to get a factory service manual or a mechanic experienced with this vehicle.