# Heating and air conditioning not starting after key left in ignitionVolvo V70

**URL:** <https://community.cartalk.com/t/heating-and-air-conditioning-not-starting-after-key-left-in-ignitionvolvo-v70/135085>\
**Category:** Maintenance/Repairs\
**Tags:** v70, volvo\
**Created:** [February 21, 2019, 10:28am UTC](https://community.cartalk.com/t/heating-and-air-conditioning-not-starting-after-key-left-in-ignitionvolvo-v70/135085 "2019-02-21T10:28:13Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Maker\_Mig](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/maker_mig/32/7142_2.png) [@Maker\_Mig](https://community.cartalk.com/u/Maker_Mig)\
**Post date:** [February 21, 2019, 10:28am UTC](https://community.cartalk.com/t/heating-and-air-conditioning-not-starting-after-key-left-in-ignitionvolvo-v70/135085/1 "2019-02-21T10:28:13Z")

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I left my keys in the ignition switch in the on position (forward) and ran to catch a train. When I came back the battery was 95% dead, the inside of the car was clicking furiously, and there was 6 inches of snow on the car.  
After I jumped it, the car started quickly, but the heated seats, heating and cooling system did not work. The radio works, but no lights on the dashboard for heating and cooling.  
I can’t find my haynes manual and it seems all the fuses I can see (transparent), are fine.  
The car starts normally, but struggles to run.  
So did I burn out my computer or something?

Thanks

Miguel

I cannot select the vehicle or the model, it is a 2002 volvo v70.

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**Author:** ![Honda-Blackbird](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/honda-blackbird/32/3159_2.png) [@Honda-Blackbird](https://community.cartalk.com/u/Honda-Blackbird)\
**Post date:** [February 21, 2019, 1:53pm UTC](https://community.cartalk.com/t/heating-and-air-conditioning-not-starting-after-key-left-in-ignitionvolvo-v70/135085/2 "2019-02-21T13:53:33Z")

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It sounds like you might want to first charge your battery fully with a charger… After you have charged it fully disconnect either battery cable for about 3 minutes. Then reconnect it, be sure both cables are clean and tight while you are at it.

Your computer may be in a funk from the slow battery drain and subsequent jump etc… See what happens after a full batt charge and a full reset of the system by disconnecting one of the leads. It may come back to normal just like that. If it does not…then we need to dig deeper.