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HVAC calibration of the actuators

Tiny
THOR051373
  • MEMBER
  • 2010 FORD FOCUS
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
I've read your threads concerning calibration of the actuators. My question is, do you take out the fuse for one minute and turn the key on with the fuse still out and wait 30 seconds? Or is your Note. Section after the fuse is put back in and the calibration will take place after the fuse is back in?
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Tuesday, February 9th, 2021 AT 5:57 PM

9 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
In most cases, the idea is to just force the HVAC control module to reboot. When it reboots it needs to relearn the door positions so it forces the calibration.

So you can do this by removing power from the module long enough so the module memory is discharged and it "forgets" the learned positions.

However, your vehicle uses a module that runs the actuators through a calibration on every cold start. So basically when the vehicle starts, the module runs the actuators to their full stop point in both directions and then takes it to the commanded position.

So we know that your vehicle doesn't require a calibrate by just looking at the replacement procedure. I attached it below for the blend door to illustrate this.

Also, here is a guide that will help as well:

https://www.2carpros.com/articles/replace-blend-door-motor

Let us know if you have questions. Thanks
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Wednesday, February 10th, 2021 AT 1:04 PM
Tiny
THOR051373
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  • 5 POSTS
Thank you. I removed the actuator and it seems to be working fine. Do you have a diagram that shows access to the actual blend door? Probably jammed by something.
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Friday, February 12th, 2021 AT 3:51 PM
Tiny
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  • MECHANIC
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It is unlikely that something is stuck in there. Did you check the gears and make sure they are not stripped out? You should have gears on both the actuator and door.

I attached the process on how to remove the housing as that is what you have to do to get the doors out. I would suggest pulling the blower motor down first as you should be able to see in there to see if the doors are jammed.
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Saturday, February 13th, 2021 AT 6:09 PM
Tiny
THOR051373
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  • 5 POSTS
I will look into it. Thanks for the info.
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Saturday, February 13th, 2021 AT 7:10 PM
Tiny
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  • MECHANIC
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You are welcome. Thanks for using 2CarPros.
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Sunday, February 14th, 2021 AT 6:43 PM
Tiny
THOR051373
  • MEMBER
  • 5 POSTS
So I've narrowed this down to possibly the blend door. My issue is now I'm still getting cold out of the drivers side vents and hot on passenger which tells me its the blend door. Sitting in the drive through the other day I started getting hot out of both vents (hotter then usual on the passenger side) then once I start driving it goes back to cold. I've read that this is a thermostat stuck open issue with constant flow of coolant through the engine not allowing engine to warm up due to the stuck thermostat. If you could give some insight into this that would be appreciated. Maybe a diagram on how to replace the thermostat. I've located it and have watched some videos. I just want to make sure it gets done correctly. I want to make sure I need to or not need to add some sealant to the gasket ect.
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Monday, February 15th, 2021 AT 12:23 PM
Tiny
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This could be a thermostat but it is unlikely if one side is staying hot and the other is not. That points more to the blend door. Only because if one side is hot then that means the heater core is getting hot coolant and the thermostat would cause that to not circulate which would cause both sides to not have hot air.

As for the addition of the sealant, you do not need to do this.

However, I attached the process below.
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Monday, February 15th, 2021 AT 6:40 PM
Tiny
THOR051373
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  • 5 POSTS
Thanks. I changed out the thermostat and now I'm getting good heat. I will look further into the blend door situation one of these days. I believe the drivers side is still slightly off.

I appreciate the help. I didn't see your latest exchange until moments ago. Not sure I got a email notification.
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Friday, February 19th, 2021 AT 3:29 PM
Tiny
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That is good to know. Normally these are not the cause of this issue but glad it worked out for you. Thanks for the update and come back to 2CarPros next time. Thanks
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Saturday, February 20th, 2021 AT 5:20 PM

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