# 97 Nissan Quest defroster and AC problem **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** nissan, airconditioning, quest\ **Created:** [February 6, 2011, 8:35pm UTC](https://community.cartalk.com/t/97-nissan-quest-defroster-and-ac-problem/60986 "2011-02-06T20:35:32Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![mlemon](https://avatars.discourse-cdn.com/v4/letter/m/6f9a4e/32.png) [@mlemon](https://community.cartalk.com/u/mlemon)\ **Post date:** [February 6, 2011, 8:35pm UTC](https://community.cartalk.com/t/97-nissan-quest-defroster-and-ac-problem/60986/1 "2011-02-06T20:35:32Z")
The AC compressor on my 97 Quest cycles off and on way too fast when my defroster’s on. I know the AC is supposed to dehumidify the incoming air - but it shouldn’t be this rapid. Is there a way to control this or shut off the AC when the defroster’s on ? Thanks. ---
**Author:** ![cigroller](https://avatars.discourse-cdn.com/v4/letter/c/c68b51/32.png) [@cigroller](https://community.cartalk.com/u/cigroller)\ **Post date:** [February 6, 2011, 8:43pm UTC](https://community.cartalk.com/t/97-nissan-quest-defroster-and-ac-problem/60986/2 "2011-02-06T20:43:15Z")
Your system is probably low on refrigerant. So you need to have the pressure checked and if low, have the leak repaired. ---
**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:** [February 6, 2011, 9:19pm UTC](https://community.cartalk.com/t/97-nissan-quest-defroster-and-ac-problem/60986/3 "2011-02-06T21:19:30Z")
Look in the owners manual and it should reflect where the compressor/AC fuse is located. Pull the fuse and that will prevent the compressor from cycling until the AC system is serviced. Or, if the compressor is easily accessed, just unplug the compressor clutch electrical connector. Tester