2013 F250 super duty 6.7 power stroke
A/C blowing warm air at idle blowing cold air during driving.
clutch fan problem???

 

Because you could have this problem with an overcharge or an undercharge, can you provide a little more history so we have some idea of which could be part of the problem ? Thanks.

 

At idle, do you mean during a cold start in the morning or everytime you are waiting at the traffic light?

 

Thank you gentlemen for reaching out.
as far as history I have had no issues with the A/C system since purchasing the truck 7 years ago. This morning when I started truck A/C was blowing cold air. After a minute or so I heard the compressor turn off and immediately system started blowing warm air I throttled up to around 1500 rpm’s and the compressor kicked in and started blowing cold air. And the answer to the 2nd gentleman is yes it will blow warm air when I stop at a stop light

 

So,,,,,,,,,,, if nobody did anything with the system, I would suspect the system is low on refrigerant.

You can purchase small cans of R134A refrigerant at most auto supply stores. You can get the connecting hose to add the refrigerant there also.

Now comes the IMPORTANT part. You will need a pair of safety glasses and a little instruction to add ONLY refrigerant gas to the low side of the system which has a BLUE screw on cap over the port. Once connected. NEVER allow the can to tip over, it must stay upright so only refrigerant vapor comes out of the can .
Do you think you want to do this ? Before going further need to know if you can have someone do this for you or not.

 

Thank you sir for your response I will take truck to my 6.7 certified tech. If there is a low refrigerant problem which I agree with your diagnosis, then I would want him to discharge system and vacuum the system to locate the leak. Would hate to add refrigerant to system due to the possibility of moisture being in system. Again I appreciate you folks on this forum. You helped me before when I had tie rod problems back in February with my F250

 

It is not uncommon for A/C system to lose refrigerant due to very small leaks from "O"ring leaks.
The right thing to do is find and repair the leak. If you choose that path you will eventually wind up replacing a lot of O rings that did not need to be disturbed.
Adding a can or two every spring is an easier path to go and it will usually last all summer long.

Opening up the system for any reason can get expensive and does now require part replacement (accumulator and orifice tube) and any other O rings that might get disturbed. Worth thinking through !

Not easy to introduce moisture into the system with short hose on can that gets purged before adding refrigerant.

 

Hmmmm good advice sir. Didn’t consider that
thank you for your input

 

Always good to hear if everything is working well when done, thanks.

 

Mr. Hanky I am going to charge system myself
question you said the charge port should have a blue cap correct? I see 2 ports both have black caps. 1 port up front near radiator with small pipe and 1 in the back passenger side near ecm which is a larger pipe. Utube shows charging port at the radiator. I don’t trust utube
could you please advise sir