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Loud humming buzzing noise when engine comes on


JayM
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Good afternoon everyone,

I’m JayM, new member and owner of 2017 Fusion Energi with 58000km (36000miles)

I had a headliner replaced and car rustproofed (respirated @ Krown )

The next day after battery depleted and engine came on there is a VERY LOUD humming noise

coming from the vehicle as it sits around 1200-1500 rpm, such as waiting @ stop sign/red light.

If I accelerate past the 1500 rpm noise disappears. No noise any other times,

(Almost seems like VERY loud fan 70-80 dB). Has anyone experienced this?

Just started couple of weeks ago. I rarely have engine running (43000km EV only)

Thanking you in advance.

JayM

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Hi Jay, the fusion has a number of fans running at any time.  I'm still only getting used to them.

To name a few:

1.  The cooled seats (if you have them) makes a fan sound

2.  The screen has a fan sound too (sounds like a desktop computer fan)

3.  There is a fan that blows air to the battery in the trunk, getting air from the vents behind rear seat head rests

4.  Car engine seems to make loud-ish fan sound when it's in electric mode only

 

So what you're hearing could be any of those or more.

None of them are too loud though that would make me uncomfortable.  Overall it's still the quietest car I've ever owned interior-wise.

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  • 4 years later...

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