# 2007 Dodge Ram 3500 - AC not cold after battery drain

**URL:** <https://community.cartalk.com/t/2007-dodge-ram-3500-ac-not-cold-after-battery-drain/165619>\
**Category:** Maintenance/Repairs\
**Tags:** dodge, ram3500\
**Created:** [June 11, 2020, 3:33pm UTC](https://community.cartalk.com/t/2007-dodge-ram-3500-ac-not-cold-after-battery-drain/165619 "2020-06-11T15:33:24Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![sfcturbo](https://avatars.discourse-cdn.com/v4/letter/s/f6c823/32.png) [@sfcturbo](https://community.cartalk.com/u/sfcturbo)\
**Post date:** [June 11, 2020, 3:33pm UTC](https://community.cartalk.com/t/2007-dodge-ram-3500-ac-not-cold-after-battery-drain/165619/1 "2020-06-11T15:33:24Z")

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batteries drained because I had left my 5th wheel plugged in and a ceiling fan and 2 lights were on for about 3 days, remote or key won’t open the doors. Used a slim jim to unlock door,now no cold air, was very cold prior to this. Please help

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**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\
**Post date:** [June 12, 2020, 3:16pm UTC](https://community.cartalk.com/t/2007-dodge-ram-3500-ac-not-cold-after-battery-drain/165619/2 "2020-06-12T15:16:21Z")

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Perhaps somebody more knowledgeable than I am will correct me, but I don’t believe that there is a connection between a drained battery and A/C failure.

That being said… Have you checked the serpentine belt?  
This could be something as simple as a snapped belt, or a belt that is too loose/glazed to turn the A/C compressor.

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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:** [June 12, 2020, 5:27pm UTC](https://community.cartalk.com/t/2007-dodge-ram-3500-ac-not-cold-after-battery-drain/165619/3 "2020-06-12T17:27:48Z")

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Here’s what can happen when a battery dies or is disconnected on some vehicles.

**It resets the Climate Control module. On some vehicles, the module will not start working again until a special relearn procedure or reprogram procedure is performed with a factory scan tool. That means no A/C until the module is programmed with the correct instructions.**

Tester

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<div class="post-metadata">

**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\
**Post date:** [June 12, 2020, 5:35pm UTC](https://community.cartalk.com/t/2007-dodge-ram-3500-ac-not-cold-after-battery-drain/165619/4 "2020-06-12T17:35:07Z")

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Hmmm… interesting!  
I would have thought that this was the type of thing that would be unique to German-made vehicles, but obviously I was wrong.

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**Author:** ![sfcturbo](https://avatars.discourse-cdn.com/v4/letter/s/f6c823/32.png) [@sfcturbo](https://community.cartalk.com/u/sfcturbo)\
**Post date:** [June 15, 2020, 2:24pm UTC](https://community.cartalk.com/t/2007-dodge-ram-3500-ac-not-cold-after-battery-drain/165619/5 "2020-06-15T14:24:33Z")

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Thank you for your timely response, I have checked the belt.

God bless

Tim Dabbs

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**Author:** ![sfcturbo](https://avatars.discourse-cdn.com/v4/letter/s/f6c823/32.png) [@sfcturbo](https://community.cartalk.com/u/sfcturbo)\
**Post date:** [June 15, 2020, 2:29pm UTC](https://community.cartalk.com/t/2007-dodge-ram-3500-ac-not-cold-after-battery-drain/165619/6 "2020-06-15T14:29:14Z")

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Can this procedure be performed with a Snap-On scanner? I had a shop reset the blend-air motor doors.

God bless

Tim Dabbs