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AC/heating not working after battery change

Tiny
GIGGLEM
  • MEMBER
  • 2016 FORD FOCUS
  • 300,000 MILES
Changed my battery today, everything works except for the A/C/heating/air. Nothing happens when I press the power/on button and the buttons on the display won’t even light up like they usually do while the car is on. I’ve tried googling to find a solution but so far haven’t found anything.
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Friday, August 27th, 2021 AT 8:01 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,289 POSTS
Hi,

The first things to check are the fuses. First, I attached the entire wiring schematic below for the HVAC system. Check the fuses related. Also, when you check the fuses, also confirm there is power to them. Fuses 85 and 71 in the interior fuse box under the left side of the dash.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

The last pic shows the fuse locations in the box.

Let me know what you find of if you have other questions.

Take care,

Joe

See pics below.

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Friday, August 27th, 2021 AT 10:41 PM

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