How does climate control work in detail?

[John Go]

Can someone point me to detailed documentation on how the Maverick climate control system works? I'm used to vehicles where I can turn the AC on or off manually, and where I can control the fan speed, amount of heat, and vents separately. My Maverick's climate control is mostly a mystery to me. My Maverick is a 2025 hybrid. I'd like to understand things like, what do the three levels of auto do, what does it mean when the AC light is on (does it mean that the compressor is running?), under what conditions does the AC come on automatically, under what conditions does the recirculate air flow turn on automatically, under what conditions does the heater engage, etc.

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[HeyBales]

So to level set - how much of the manual in the Climate Control Section have you gone thru?

https://www.fordservicecontent.com/...=USA&VIN=&userMarket=USA&div=f&buildtype=web#

 

[matmondro]

The long and short of it...

The climate control can essentially run automatically with minimal driver input, or can be completely overridden in all aspects and function like an old-style manual climate control system.

My best advice to you, having owned multiple vehicles with auto climate control: just leave it on auto and let it do the figuring itself. Even my 1992 Corvette has auto climate control and it works excellently (same with my Mav). Think of it like a house thermostat, just set it at your desired temp and let it be.

 

[HeyBales]

One difference with 25/26 that has been noted and tested.

The system can turn the HVAC on and AC on and show that by normally lit button.

Pre-25 if HVAC system is button off - it's off.
When you turn it on it may have AC button on compared to you having it off prior to turning truck off.

In all of them - you may show AC button as off - and system will actually have it on in background to aid with high humidity.

Also in either case - if you have no recirc air, temp to Lo, and no AC button pushed - you'll get outside air.

 

[John Go]

Yes, I've read the owners manual and it barely scratches the surface. It says nothing about the Auto mode, and it says nothing about things turning on automatically, which I see most times when I start the vehicle.

I want to be able to run my vehicle as efficiently as possible, and that means not running the AC compressor unless I really need it, hence many of my questions.

This is good to know: "if you have no recirc air, temp to Lo, and no AC button pushed - you'll get outside air." Thank you Hay Bales.

 

[MavStangVa]

Yes, I've read the owners manual and it barely scratches the surface. It says nothing about the Auto mode, and it says nothing about things turning on automatically, which I see most times when I start the vehicle.

I want to be able to run my vehicle as efficiently as possible, and that means not running the AC compressor unless I really need it, hence many of my questions.

This is good to know: "if you have no recirc air, temp to Lo, and no AC button pushed - you'll get outside air." Thank you Hay Bales.

Get a 1960 Falcon, 3 on the tree and your worries are over. Or trust the computerized climate system to work as efficiently as it possibly can. If you have to worry about squeezing out another 0.001 MPG then you need a bicycle.

 

[Ryom]

Yes, I've read the owners manual and it barely scratches the surface. It says nothing about the Auto mode, and it says nothing about things turning on automatically, which I see most times when I start the vehicle.

I want to be able to run my vehicle as efficiently as possible, and that means not running the AC compressor unless I really need it, hence many of my questions.

This is good to know: "if you have no recirc air, temp to Lo, and no AC button pushed - you'll get outside air." Thank you Hay Bales.

The hybrid AC unit is a variable speed, direct current screw compressor. It will only work just hard enough to deliver the requested temperature in the cabin and it will do so very, very efficiently. The recirculation function will be automatically disabled if the humidity sensor detects excessive moisture in the cabin and then re-enabled once the humidity drops. Auto fan will control the fan speed for you, higher auto settings allow higher fan speeds... use a low setting if you don't like high air speeds.

 

[Bob zimmerman]

I’ve had my 25 XLT for 1.5 years and I have no idea how it works. I gave up.

The only things I bother with are the temp and fan speed. The rest is hokus pokus.

 

[dalola]

The only difference between the 3 auto settings is the max fan speed; meaning, level 1 max fan speed is lower than level 2 & 3, where level 3 will allow max fan speed. Otherwise, it functions identically between the levels.

When the HVAC is "ON", your settings, regardless of what they are, can be overridden at any time the truck senses high humidity levels in the cab. The threshold for this is unknown, likely in the 60% range. The system will run the compressor until humidity levels are back under the threshold, then revert back to your settings. The only way to avoid this is by turning the HVAC "OFF" completely.

Otherwise, everything functions as you would expect.

 

[rclee]

The hybrid AC unit is a variable speed, direct current screw compressor. It will only work just hard enough to deliver the requested temperature in the cabin and it will do so very, very efficiently. The recirculation function will be automatically disabled if the humidity sensor detects excessive moisture in the cabin and then re-enabled once the humidity drops. Auto fan will control the fan speed for you, higher auto settings allow higher fan speeds... use a low setting if you don't like high air speeds.

To add to what @Ryom is saying, there is no Horsepower loss from the Internal Combustion Engine (ICE) when the compressor is running. The compressor is an all electric motor running off the High Voltage Battery (HVB) under the truck.

 

[DScruggs]

On of my biggest complaints about my 2025 Mav Hybrid is the Automatic Climate Control. It simply doesn't work well. I can have it set at 72 degrees and feel a little cold so I set it to 73 or 74 and there is no change. Still cold air blowing out the vents. I have to push to 77 or 78 before there is any recognition of a change requested. The same thing happens in the other direction. I can be warm with it set at 74 and I have to adjust to 68 or 69 before any change in output is apparent.

I have been an ASE certified Master Tech since 1982 (now retired) so I do know a little about how these things are supposed to work.

 

[lm126027]

The long and short of it...

The climate control can essentially run automatically with minimal driver input, or can be completely overridden in all aspects and function like an old-style manual climate control system.

My best advice to you, having owned multiple vehicles with auto climate control: just leave it on auto and let it do the figuring itself. Even my 1992 Corvette has auto climate control and it works excellently (same with my Mav). Think of it like a house thermostat, just set it at your desired temp and let it be.

I don't know if it is my truck or what... But I cannot set the heat (on automatic) any higher than 63 or I cook my self out of the truck. My 2020 Escape always ran on 68. I used automatic almost exclusively on the Escape, run manual most of the time in non-winter months on the Mav. Ford issues.... there is no way to shut the dash vents completely on the Mav. My 2020 Escape had a rotating wheel that actually closed off the vent completely. On the Mav they always leak, whether I move them to the left or right (that is suppose to close). This next one is a pet peeve of mine.... Even if the air conditioner is not turned on (even if not on automatic) the truck will run it anyway if IT decides that the humidity is too high (air conditioner light will not be on). This happens even when driving with the sun roof open, rear window open and dash vents attempting to bringing in outside air.... Why the hell can that not be turned off? I have to shut off the system entirely to stop it from running, but then there is no air coming thru the dash vents. Grrrrr. Come on Ford, let us decide if we need the air turned on. I wish Ford still monitored this page.....

 

[Truckish]

To add to what @Ryom is saying, there is no Horsepower loss from the Internal Combustion Engine (ICE) when the compressor is running. The compressor is an all electric motor running off the High Voltage Battery (HVB) under the truck.

Eventually that battery has to be recharged by regeneration or the engine which does consume power when the battery needs it. It is still using resources. Also I have the same concerns on ecoboost where the AC is needlessly coming on when I don't want it and using extra fuel and the engine doesn't run as smooth with it engaged. With that said, for those sharing how it works, that is helpful. OP, I get your curiosity and share it and I'm sorry mustangva is trolling you with stupid comments like get a 60s car when you are asking a legit question on a car forum. Some guys just get off on stupid stuff like that.

 

[HeyBales]

I don't know if it is my truck or what... But I cannot set the heat (on automatic) any higher than 63 or I cook my self out of the truck. My 2020 Escape always ran on 68. I used automatic almost exclusively on the Escape, run manual most of the time in non-winter months on the Mav. Ford issues.... there is no way to shut the dash vents completely on the Mav. My 2020 Escape had a rotating wheel that actually closed off the vent completely. On the Mav they always leak, whether I move them to the left or right (that is suppose to close). This next one is a pet peeve of mine.... Even if the air conditioner is not turned on (even if not on automatic) the truck will run it anyway if IT decides that the humidity is too high (air conditioner light will not be on). This happens even when driving with the sun roof open, rear window open and dash vents attempting to bringing in outside air.... Why the hell can that not be turned off? I have to shut off the system entirely to stop it from running, but then there is no air coming thru the dash vents. Grrrrr. Come on Ford, let us decide if we need the air turned on. I wish Ford still monitored this page.....

They listened to something and went the exact opposite direction!

Now the truck can turn the HVAC system on, which means AC too.
And "button" pushed at that, so actually lit!
I guess that's good - don't try to hide it anymore.

I'm betting the dash vents not actually closing is because of dealership visits with Customer Complaint - "my fan broke and I feel no air out of the vent, now my windows are fogging up".

Every time I see an annoying change/improvement now - I can't help but think this is because of lack of thinking ability to some high level.
Like playing with a bag over your head - several had to do it to require a warning.

 

[MavStangVa]

Eventually that battery has to be recharged by regeneration or the engine which does consume power when the battery needs it. It is still using resources. Also I have the same concerns on ecoboost where the AC is needlessly coming on when I don't want it and using extra fuel and the engine doesn't run as smooth with it engaged. With that said, for those sharing how it works, that is helpful. OP, I get your curiosity and share it and I'm sorry mustangva is trolling you with stupid comments like get a 60s car when you are asking a legit question on a car forum. Some guys just get off on stupid stuff like that.

Thanks. If you can't laugh at yourself others will do it for you

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