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Ask A. Penland Your Own Question
A. Penland
A. Penland, Ford Senior Master Technician, ASE
Category: Ford
Satisfied Customers: 6212
Experience:  ASE Master Certified, ASE Advanced Gasoline Engine Performance
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Ford

My AC was working and just stopped, it was blowing cold air.

my AC was working ... Show More
my AC was working and just stopped, it was blowing cold air. I started it this morning and the blower is working but its only blowing hot air
JA: Have you checked the coolant level? Have you checked for a leak in the radiator?
Customer: no
JA: What is the model/year of your Ford?
Customer: 2010 F-250
JA: Are you fixing your F250 yourself? What have you tried so far?
Customer: trying
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 1 month ago.
Category: Ford
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replied 1 month ago.

First, start the truck and tur the AC on and see if the AC compressor clutch is engaging please.

Customer reply replied 1 month ago.
it sounds like it is
Customer reply replied 1 month ago.
Are you still there
A. Penland, Ford Senior Master Technician, ASE replied 1 month ago.

Is it cycling on and off while the engine is running every 3 to 5 seconds?

Customer reply replied 1 month ago.
Sounds like it is
A. Penland, Ford Senior Master Technician, ASE replied 1 month ago.

There is a leak in the system. Even though the compressor is engaging, if there is no Freon or very low Freon level in the system, it will not cool down. You will need to have the system properly checked for leaks. We have seen issues with the evaporators leaking in these F250s. Sometimes you will smell the Freon inside the cab when the blower motor is running.

Customer reply replied 1 month ago.
I checked the level of freon and it was good
A. Penland, Ford Senior Master Technician, ASE replied 1 month ago.

Do you have a manifold gauge set to check pressures when the engine is running?
How did you check the charge level?

Customer reply replied 1 month ago.
No I used a fill can of freon
A. Penland, Ford Senior Master Technician, ASE replied 1 month ago.

You will need to check the pressures on the high side and low side of the system. Just checking the Freon level with a fill can is not the proper way. If you have a restriction in the system, it will not cool. And if you have a failing compressor, the system will not cool because the pressures do not reach the proper specifications and the low side cycle switch and the AC cut out switch will shut the compressor off if the pressures are not at the proper levels.