tzgoetz3
Posts: 5
Joined: Tue Mar 16, 2021 5:43 am

humming noise

Tue Mar 16, 2021 5:56 am

I recently took my ford EV to the ford dealership because there is a humming noise coming from the front dash. i can't pin point exactly where. So they said it was the compressor and replaced that. $2000 later it is still making this noise. I don't know enough about this car to know what is under the hood. I don't even know if the compressor needed to be replace! Anyone have this issue? Thanks

Heima
Posts: 152
Joined: Thu Feb 21, 2019 11:46 pm

Re: humming noise

Tue Mar 16, 2021 10:31 pm

I have noticed a fan noise coming from the APIM or the electronics in that area. Behind the navigation screen. Most likely what I am hearing is a circuit board fan, to keep cpus and other types of computer chips cool. It is fairly quiet.
Not a problem unless it is quite prevalent or offensively noisy.

I am sorry that your dealer is a crook. The A/C compressor makes a noticeable whine, however that is hard to hear in the cabin. Outside at the front of the vehicle it is easier to hear. And the whine is normal. If the compressor is going to fail, it will probably set a DTC code beforehand.

Listen for yourself, turn on the A/C, set the fan speed to lowest, get out of the car and stand at the front and listen. It will probably have a slowly increasing pitch. Turn off the A/C and stand in front of the car again, the whine will probably have a slow decreasing pitch.

tzgoetz3
Posts: 5
Joined: Tue Mar 16, 2021 5:43 am

Re: humming noise

Wed Mar 17, 2021 5:43 am

Great!!!! I should have said no to the fix because I did open the hood to see if I could hear the humming noise outside the car. BUT I didnt have the car running or the a/c I expected more from the dealership! So if anything else is wrong I should get a code? They wrote in their notes I need a new cooling fan motor! Thanks for your help!!!!

Heima
Posts: 152
Joined: Thu Feb 21, 2019 11:46 pm

Re: humming noise

Wed Mar 17, 2021 7:17 pm

Yes, if just about anything goes wrong with the FFE, there is a DTC code created. However, you are not able to retrieve these codes with a standard OBDII reader, you need an interface that can handle High Speed and Medium Speed CAN signals. You will also need a laptop with Forscan installed. I am quite happy with my OBDLink EX USB interface. Right now it is $50 at amazon. Some people prefer other interfaces, but they do not have automatic HS and MS CAN switching. You must manually flip a switch. Be wary of any interface that is less than $20 as there are many unreliable Chinese clones. To read codes, you can use the free version of Forscan. To do testing and changing parameters, you need to get a Forscan license. I think they are about $10 per year.

There is another way to see DTC codes, however I am not for certain if that method displays all codes. Read about Engineering Test Mode here:
viewtopic.php?f=7&t=4991&p=32823

Once you see the DTC codes, you can either use Google or the FFE service manual for more information. Get the service manual here:
viewtopic.php?f=14&t=4921&p=32331

I would not trust that dealer anymore. They are jerks. $2000 to replace an A/C compressor is too much, and it probably wasn't necessary. When they did that job, did they also replace the desiccant bag and flush the system? If there truly was a problem with the old compressor, they better have. You most likely do not need a fan replaced.

tzgoetz3
Posts: 5
Joined: Tue Mar 16, 2021 5:43 am

Re: humming noise

Fri Mar 19, 2021 5:16 am

paperwork says that they did. They also did DTC scans and no DTCs were present. They recommended the a/c compressor cause they felt that was where the noise was coming from. When they replaced it the noise was no longer there! The noise im hearing is still there!!! I was just reading the paperwork they gave me. I should have just said no. Do you happen to know how much battery these car lose per year? whats normal and not? I'm in AZ and I know the heat is brutal on these cars. My car would charge up to 165 last year before summer and now I'm at 140.

Heima
Posts: 152
Joined: Thu Feb 21, 2019 11:46 pm

Re: humming noise

Fri Mar 19, 2021 4:58 pm

I am a little confused, 165?, 140?

tzgoetz3
Posts: 5
Joined: Tue Mar 16, 2021 5:43 am

Re: humming noise

Sun Mar 21, 2021 8:51 am

sorry that is what my battery would charge to 165. that was full for my car. after this past summer it only charges to 140 at the most. Is it normal to lose that much? does that make sense? also that humming is more like a buzzing sound. It has gotten louder and seems to come from the push button ignition.

Heima
Posts: 152
Joined: Thu Feb 21, 2019 11:46 pm

Re: humming noise

Sun Mar 21, 2021 10:51 pm

I am guessing that is 165 kilometers range? A 2017, 2018 should get that range in mild weather. In slightly warmer weather, the range will increase, but any use of the A/C will quickly negate that. Cooler weather and use of the heater could bring the range down to 140.

There are some basic means of determining battery degradation, but i prefer to use Forscan. Charge the battery up to 100% and then use Forscan to display the estimated battery capacity. At best, my 2017 seems to max at 29 kwh.

Sometimes i hear a buzzing noise come from the center display, this caused by the voltage inverter to drive the fluorescent lamps of the LCD panel. sometimes it is noisy, sometimes it is silent.

tzgoetz3
Posts: 5
Joined: Tue Mar 16, 2021 5:43 am

Re: humming noise

Mon Mar 22, 2021 9:17 am

Well that noise is getting louder and it’s everyday. So idk what I should do. Don’t know who to take it to if the dealership is gonna screw me over! I really don’t use the a/c even when it’s hot cause I know it drops it down quite a bit. Thanks for helping me out. I love my car but I’m still learning things about it!

Heima
Posts: 152
Joined: Thu Feb 21, 2019 11:46 pm

Re: humming noise

Mon Mar 22, 2021 7:29 pm

I dont know where you are located, but a good independent shop that specializes in hybrids might be better than the dealer. At least they would be knowledgeable of electric drivetrains.

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