Anyone ever solve the Fusion AC blowing hot or cold based on fog lights being activated issue?

3663 Views 3 Replies 4 Participants Last post by LakePlacid, Jun 26, 2021

PeytoFluve

Discussion Starter · Jun 4, 2021

Hello,

I'm new to the forum and I'm looking for some insights into an odd problem. I've got a 2011 Fusion with the 4 cylinder and manual AC. The AC started blowing hot (not just not blowing cold, but only blowing heated air). I can hear my blend door humming as I change the temperature, so the blend door is working. The only thing that works is this quirky advice I've seen on several forums suggested by several people: keep the lights and fog lights on and the AC will stay cold. It sounds weird, but I can confirm that this trick does work. My AC blows consistently cold only as long as the lights are on. My question is: does anyone have an explanation for this and will replacing the AC control module address this odd electrical cross-over?

Thanks for the space to pose the question.

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SamYenko

· #3 · Jun 19, 2021

Hi,
First im new to the forum, so hello.
So original fusion owner 2010 2.5 auto SE.
Yes the fog light trick works.
Years ago has the HVAC control panel replaced helped for a couple years.
Then again fog light trick. So replaced the blend door, that worked till this year. Again fog lights.
So when parking turn off AC, turn off lights, then car, reverse order when starting and not to quickly. Also helps to park in shade and use a window visor. The hotter the car parked the harder it is to get AC working.
Next i plan on actually using a manual choke cable to "override" blend door.
Cause a black on black car is ridiculous in summer especially when such a small electric short is ruining it.

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