Heater Blowing Cold - Ford Transit USA Forum
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post #1 of 13 (permalink) Old 01-11-2017, 02:30:AM Thread Starter
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Heater Blowing Cold

The heat in our 2015 Transit XLT blows cold even though the engine is up to operating temperature. Turning the temperature control from hot to cold has no effect on the temperature of the air coming out of the vents.

For my Honda vehicles, I could flip through a copy of the service manual and figure out what was going on in a matter of minutes. Why does Ford make it so hard on its owners.

I don't know if the Transit uses traditional cable operated mixing in the heater core or if it uses servos. Does it even use a traditional heater core?

Thanks for the help guys.


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2015 350 XLT 3.5L 148" LR 12 passenger
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post #2 of 13 (permalink) Old 01-11-2017, 06:21:AM
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GM and john deere tractor are attempting to make it illegal for the consumer to work on there own vehicles now by saying the software on the engine computer is there private property regardless of who owns the vehicle itself! you can bet ford is jumping on the same bandwagon!

when i switch the vent switch there is a delay between when one vent closes and the next one opens so i would guess it is vacuum controlled? also others here have said that the front heater never turns off, it is how the air conditioner air temps are controlled by mixing hot and cold air, and that there is a mixing door inside the heater! i am guessing this is what controls the mixing door, there is also a controller and an actuator that may be part of it? http://parts.autonationfordwhitebear...e=adjust-motor
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post #3 of 13 (permalink) Old 01-11-2017, 10:02:AM
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The air inlet door, air distribution door, and temperature door are all controlled by stepper motors driven by an HVAC control module, which is commanded by the Body control module.
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post #4 of 13 (permalink) Old 01-11-2017, 11:05:AM Thread Starter
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Thank you guys for the tips. I'll let you know how I make out. We're taking a camping trip this weekend and it would be nice to have heat when the expected lows are in the 20's.

Regarding DIY auto repair and intellectual property, that is a bunch of BS, as far as I'm concerned. Being able to work on the Transit has been one of my biggest gripes since purchasing it. I feel like we're fumbling around in the dark, chasing our tails when we try to work on these vehicles ourselves. It really removes any sense of pride in ownership that I should feel towards the vehicle manufacturer--Ford. Having to look at parts diagrams at an online parts warehouse or do exploratory surgery before making a diagnosis in a modern vehicle when you should be able to flip through a service manual is a pile of steaming horse crap.

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post #5 of 13 (permalink) Old 01-11-2017, 11:38:AM
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You do know you can buy a service manual, right?
Got mine for $60 on ebay- official Ford, worth every penny.

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post #6 of 13 (permalink) Old 01-11-2017, 12:41:PM Thread Starter
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You do know you can buy a service manual, right?
Got mine for $60 on ebay- official Ford, worth every penny.
I'll have to look into that. Would prove to be helpful. Is it electronic or printed? Can you post a picture so I'll know what I'm looking for? thanks


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post #7 of 13 (permalink) Old 01-11-2017, 12:54:PM
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that must be the european ford transit because the full US ford transit service manual from ford is a 2700 dollar a year online subscription.

https://www.motorcraftservice.com/Purchase/ViewProduct
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post #8 of 13 (permalink) Old 01-11-2017, 01:32:PM
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Nope same thing the dealers in the US use- a DVD or CD. The ones they send the dealers are replaced every few months and apparently some enterprising techs have a side business selling the old ones usually on ebay...Bought my first one back in about 96 and have bought several since whenever I get a new Ford..

The only catch is they expire- no problem> you can change the date on your computer and use it just fine...I even have an old laptop that is used just for that- keep it on August 2015 for my 2015 DVD.

If you want a genuine not expired one they are $177 at Helminc.com, Ford's official service info vendor.
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post #9 of 13 (permalink) Old 01-11-2017, 10:41:PM
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nice, you can get the Helminc ford transit wiring diagrams are in a paper manual for 82 dollars. (warranty covers all repairs for now but knowing what wires are what will come in handy!)

http://www.helminc.com/helm/product2...916&itemtype=N

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post #10 of 13 (permalink) Old 01-11-2017, 11:03:PM
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Originally Posted by Michael Ophus View Post
nice, you can get the Helminc ford transit wiring diagrams are in a paper manual for 82 dollars. (warranty covers all repairs for now but knowing what wires are what will come in handy!)

http://www.helminc.com/helm/product2...916&itemtype=N
Are all those wiring diagrams on that $170 CD they sell on that same webpage?

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