A/C not working

AZAMORA619

MEMBER
2009 FORD F-150
175,800 MILES

The trucks a/c works fine blows nice cold air but the issue is that for some reason the entire cabin feels warm especially in the back seats. Before I would have the a/c blowing on the lowest setting and it would cool the entire truck cabin. But now even if I have the a/c on max it still wont cool the entire cabin like it did before, (when a/c s set at max and I put my hand on the vents, the air feels really cold). What could be the problem?

3 Replies

HMAC300

MECHANIC
48,601 POSTS

The system sounds low on charge here is a video to help confirm the issue.

https://youtu.be/uZrQCGwXfek

try pulling the hvac fuse with key on for 60 seconds first then reinstall and wait another minute and see if that cures it. sometimes the actuators reset and they control heat/cool and direction of air. if not that then follow this guide.

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Please run down this guide and report back.

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Thursday, April 15th, 2021 AT 2:32 PM

BIGFISH86

MEMBER
1 POST

I’m having a issue with my 2010 xlt 4.6 4x4 ac. The problem is the force the air is being blown from the vents. The force of air will drop off as if the ac fan speed was set at 1. Then randomly the blower moror will surge up and blow harder. However at no point does it feel like the air is coming out of the vents as hard as it should be when set on high. I’ve replaced the blower motor, resistor (4 times) and the blend door actuator. Summers in Texas suck and would really enjoy using a properly working ac again. Any help would be greatly appreciated.

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Thursday, April 15th, 2021 AT 2:32 PM

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

Hello,

It sounds like the HVAC controller is out. To be sure lets run CAN scan to confirm the issue. here is a video that shows the job being done with diagrams below to show you how to replace the controller:

https://youtu.be/InIlnsjOVFA

Check out the diagrams (below). Please let us know what happens.

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