# Is anyone familiar with Lexus HVAC? 1996 SC400

**URL:** <https://community.cartalk.com/t/is-anyone-familiar-with-lexus-hvac-1996-sc400/148796>\
**Category:** Maintenance/Repairs\
**Created:** [September 15, 2019, 3:56pm UTC](https://community.cartalk.com/t/is-anyone-familiar-with-lexus-hvac-1996-sc400/148796 "2019-09-15T15:56:07Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\
**Post date:** [September 15, 2019, 3:56pm UTC](https://community.cartalk.com/t/is-anyone-familiar-with-lexus-hvac-1996-sc400/148796/1 "2019-09-15T15:56:07Z")

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Trying to find how to over ride all the inputs to allow compressor to operate and take a partial charge in order to diagnose the basic problem.

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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:** [September 15, 2019, 5:50pm UTC](https://community.cartalk.com/t/is-anyone-familiar-with-lexus-hvac-1996-sc400/148796/2 "2019-09-15T17:50:18Z")

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Unplug the low pressure switch on the receiver/drier, and plug a jumper wire in the electrical connector.

Tester

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**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\
**Post date:** [September 15, 2019, 6:25pm UTC](https://community.cartalk.com/t/is-anyone-familiar-with-lexus-hvac-1996-sc400/148796/3 "2019-09-15T18:25:40Z")

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Thanks!!!