# Decided to put the AC on one day but nothing but warm air, observed compressor didn't cycle

**URL:** <https://community.cartalk.com/t/decided-to-put-the-ac-on-one-day-but-nothing-but-warm-air-observed-compressor-didnt-cycle/78536>\
**Category:** Maintenance/Repairs\
**Created:** [April 7, 2013, 8:02pm UTC](https://community.cartalk.com/t/decided-to-put-the-ac-on-one-day-but-nothing-but-warm-air-observed-compressor-didnt-cycle/78536 "2013-04-07T20:02:06Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![grizz](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/grizz/32/2597_2.png) [@grizz](https://community.cartalk.com/u/grizz)\
**Post date:** [April 7, 2013, 8:02pm UTC](https://community.cartalk.com/t/decided-to-put-the-ac-on-one-day-but-nothing-but-warm-air-observed-compressor-didnt-cycle/78536/1 "2013-04-07T20:02:06Z")

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…any thoughts why this would suddently occur and why? vehicle is a 98 tahoe.

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [April 7, 2013, 8:06pm UTC](https://community.cartalk.com/t/decided-to-put-the-ac-on-one-day-but-nothing-but-warm-air-observed-compressor-didnt-cycle/78536/2 "2013-04-07T20:06:50Z")

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The AC system is probably low on refrigerant. If it is, there’s a low pressure switch in the system that prevents the compressor from operating so the compressor doesn’t get damaged from lack of oil.

Tester