Overheating interior
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Cross-Country
Joined: Aug 2018
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Overheating interior
This may be old news as I just last year went from 22 to 25 f350 platinum. This truck overheats in the interior bad when it’s between 32-64 outside temperature. Have to turn to like 60 to get any cooling. Apparently it’s been doing this in all trucks after 23 even brand new ones on lot. Can’t believe this. Not acceptable anyone have a fix I’m going into to forscan to look for settings. I’ve been buying new trucks since 08 every two years what the heck? My dealer is in talks with an engineer at ford but supposedly they have been replacing modules trying to fix this it’s clearly software issues? Let me know if anyone knows anymore?
thanks
thanks
Last edited by Ees73; Apr 14, 2026 at 11:10 AM. Reason: Needed to explain not engineer but interior
Cross-Country
Joined: Oct 2017
Posts: 65
Likes: 25
From: Az
This may be old news as I just last year went from 22 to 25 f350 platinum. This truck overheats in the interior bad when it’s between 32-64 outside temperature. Have to turn to like 60 to get any cooling. Apparently it’s been doing this in all trucks after 23 even brand new ones on lot. Can’t believe this. Not acceptable anyone have a fix I’m going into to forscan to look for settings. I’ve been buying new trucks since 08 every two years what the heck? My dealer is in talks with an engineer at ford but supposedly they have been replacing modules trying to fix this it’s clearly software issues? Let me know if anyone knows anymore?
thanks
thanks
I think your truck might have a problem. This is my 9th superduty
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Cross-Country
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I’m happy for you that you live in warm area but when you read my write up it says it happens when it’s between 33-64 outside temp. When it warms over 64 it works fine. We live in Canada and see lots of weather in that temp range. Yes we have great cooling if a switch to max cool. I’m an hvac tech for 30 years and fully understand what’s going on it’s a software bug that is clearly happening to all of them during those outside temps. My dealer took a brand new truck on the lot and behaves the exact same way. My dealer agrees there’s an issue waiting on engineering just asking if anyone has any info or work arounds.
Cargo Master
Joined: Aug 2012
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From: Kaufman TX
Okay, I've seen this correspond with low flow when the evaporator freezes over. But if you're still getting strong airflow but it's just warm then something else is going on.
Mountain Pass
Joined: Sep 2024
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Check the ac status light. Then check to see if coolant is actually circulating in the ac system.
Just a WAG, but I am wondering if there is a software switch that is turning off the ACwhen below certain temps so outside air can be used instead to improve fuel efficiency
I suspect it is set like that across the entire Ford lineup
what is the temp coming out of the registers on both normal and max ac settings?
Just a WAG, but I am wondering if there is a software switch that is turning off the ACwhen below certain temps so outside air can be used instead to improve fuel efficiency
I suspect it is set like that across the entire Ford lineup
what is the temp coming out of the registers on both normal and max ac settings?
Last edited by Stonehauler; Apr 14, 2026 at 04:44 PM.
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Mountain Pass
Joined: Nov 2017
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Sounds like my 2025 transit, if you set it to say 72 it will heat the cab continuously to 90 degrees or so. I don’t believe Ford has any cabin temperature sensor. It seems they are using the outside temp and guessing based on a logic. We always just shut the heat off because it doesn’t stop. If it’s 50 or 60 out it’s not so bad, this is what makes me think fords programming just says “blast endlessly if cold out”. Stupid design, just go to manual blower and heat/cool control and make it easy on my employees. Having to go though three screens to turn it to Low after it overheats the cab is ridiculous while trying to drive and focus on the road. I was floored when they showed me how horrid it was. The temperature set point means nothing, so don’t even have it imo.
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Cross-Country
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Yes same problem compressor is disabled at 32 f so it’s definetly running on max cools awesome. There is definitely in cab sensor which works and is accurate once ambient outside temperature is about at 70. Below that they warm up interior. I have to set to about 63 degrees to feel comfortable my 22 and all my earlier models worked perfectly and this is happening on brand new units coming out I was just at dealer and we tested a 2026 and it did exact same thing. Yes its going to be some software issue. It is going to there engineer. I wonder if fords ceo would have his home ac need to be set at 62 to maintain 70 then once outside air warms up to 70 now switch it to a point of 70. This is now 3 years this is happening but people may not notice depending on ambients they drive in or how long of slow season changes are it’s annoying when you spend and buy the highest trim possible to get control equal to a 1985 lol. Will see what engineer says with my dealers findings he’s sending all readings in to him with brand new vehicles hopefully they adjust this
Mountain Pass
Joined: Sep 2024
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Yes same problem compressor is disabled at 32 f so it’s definetly running on max cools awesome. There is definitely in cab sensor which works and is accurate once ambient outside temperature is about at 70. Below that they warm up interior. I have to set to about 63 degrees to feel comfortable my 22 and all my earlier models worked perfectly and this is happening on brand new units coming out I was just at dealer and we tested a 2026 and it did exact same thing. Yes its going to be some software issue. It is going to there engineer. I wonder if fords ceo would have his home ac need to be set at 62 to maintain 70 then once outside air warms up to 70 now switch it to a point of 70. This is now 3 years this is happening but people may not notice depending on ambients they drive in or how long of slow season changes are it’s annoying when you spend and buy the highest trim possible to get control equal to a 1985 lol. Will see what engineer says with my dealers findings he’s sending all readings in to him with brand new vehicles hopefully they adjust this
What my thought was is that there is a bug in the software that uses the heater core to bring the heat up from say...external 40 F to 72F in the cabin. Instead of a proper mix of the air from the heater core and external air (assuming this air mix is how they control temps), they just use the full output of the heater core. That's why I would like to know the temp coming from the louvers/registers. Does it change temps if you use a different air flow setting (defrost/feet, defrost/face, face/feet, all three together, locations individually).
I am getting a truck with dual zone temp control soon (ordered) and I don't want this problem either, so I am hoping this can be identified and tossed to ford for a fix.
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Cross-Country
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No it’s blows same temp no mater of which vent it comes out of. Just talk with others this is happening in mustangs and transits as well. They are using ambient outside temperature to adjust output not so much inside temp until it reaches 64-70 outside. Yes the heater core is always hot the evap is always cooling by discharge the interior sensor is suppose to move dampers mixing heat and cold to make cabin happy. Actually blows my mind that there is no solenoid on hot water they have a red hot coil sitting in dash when it’s 100 outside air being held back by a damper. And they’re worried about energy wasting 🤷♂️🤷♂️
5th Wheeling
Joined: Apr 2024
Posts: 42
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This may be old news as I just last year went from 22 to 25 f350 platinum. This truck overheats in the interior bad when it’s between 32-64 outside temperature. Have to turn to like 60 to get any cooling. Apparently it’s been doing this in all trucks after 23 even brand new ones on lot. Can’t believe this. Not acceptable anyone have a fix I’m going into to forscan to look for settings. I’ve been buying new trucks since 08 every two years what the heck? My dealer is in talks with an engineer at ford but supposedly they have been replacing modules trying to fix this it’s clearly software issues? Let me know if anyone knows anymore?
thanks
thanks
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Cross-Country
Joined: Aug 2018
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So you have your truck outside when it is 40 degrees outside and and your thermostat is set to 70 and and your not blowing warm or hot air truck stays at 70? For an hour or so? Numerous vehicles tested on lot where doing this. Vehicles would get over 80 degrees running like this?
Last edited by Ees73; Apr 15, 2026 at 06:03 AM.
Mountain Pass
Joined: Feb 2013
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Just got a '25 Platinum been driving for few weeks and I haven't noticed anything like you describe. I usually have temp set to 70 and it regulates just fine. Weather has been all over the place for temps lately but mostly in the range you mentioned.
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Cross-Country
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That's interesting my dealer just tested 3 more vehicles they have on lot all doing it 2-23's and 1-26. these are now 150's. they were all lariats. what is your trim level? if your up for it what is your vent discharge temp when set to 70 when its 40f outside?