I have an 07 FX4 with almost 60,000 miles on it. It has been in the NC hot sun. The guy before me used the truck for landscaping, so I'm assuming that he used the hell out of the A/C too.

I have been noticing that the a/c doesn't seem real cold. It's definately cool, but I have felt better. I ahev some time tomorrow morning. Is there a check I can do myself without having to get raped by taking it to a shop?

I have probes to see what the temp split is, but what should I temps splilt shoud I bee looking for if the outside temp is around 70-80?

If it's low what can I do to fix? Would it likely be as simple as adding more refrigerant? Could it be the fan clutch? I have tried to do some reasarch but couldn't find much on this topic.

Any help is appriciated!

 

I've had the same problem with my 2004 Scab since new, seems worse this year. I did a search on here last weekend and was planning on taking the truck in last Monday to have it looked at. After reading these threads (below) and others, I'm convinced that this is just how my a/c is going to work.
I added some refrigerant Sunday and it helped a little. Its also been helping to roll the back windows down for the first 2-3 minutes after starting her up after work, and putting the max a/c (w/ recirculation) on helps as well.

Just seems to be a common problem with these trucks. But I love it otherwise (oh, except for the spark plugs, of course ).

https://www.f150online.com/forums/20...ld-normal.html

https://www.f150online.com/forums/20...wing-cold.html

https://www.f150online.com/forums/20...ally-cold.html

 

i got my ac freon topped off. big difference as long as the truck was moving. when stopped ac vent temp went way up. guy at the shop said fan clutch was bad. replace the clutch, (half hour job) and it made a world of difference. apparently these clutches are garbage. when i had the clutch off i turned it a couple times and it had resistance to turning after a couple times it spun with no resitance. so that fan was moving no air. only 60 bucks for the clutch. i would give it a try. my gas mileage did go down some cause of the new increased drag on the engine.

 

That's where an E-fan helps a lot.

 

Well I have been wanting to do e-fans. Maybe I will be able to convince the wife that it's a necessary upgrade/replacement to help keep our dogs cool when they travel with us.

Since you brought up e-fans I have some questions because I have been doing some research on those and following the forums.
Do they leave you with any codes on the dash when you remove the clutch/fan?
Why is their power supply spliced to the a/c? Does this mean that the fans only turn on when the A/C is on?

I would likely get some fans from ebay and a DCControl module.

 

Well, my A/C is ice cold, so cold that it will force you to turn it down or off, in my 06 XLT scab.

However my problem is, when you slow from highway speeds to a stop the truck idles low and rough, but only if you have been and are running the A/C.

I think it might just be because my gryphon's set the idle a littler lower than factory maybe.

 

i contemplatd efans but money right now said no.

 

Invest in some ac gauges and check the pressures or get someone else to do it. The AC was working poorly in mine and when I checked the pressures this past Wednesday, they were indeed low. One can of R134A appears to be all it needed. Works much better.

 

I added a ball valve on the coolant hose going into the radiator. It dropped me about 10 degrees. There is a post some where on here about it. On alot of vehicles have these, they are electronic and when you put it on recirculate the flow to the heater core cuts off.

 

Because you have an electric clutch (2007-2008), you will have a code. However, there is no indicator light for that code.
Most controllers have an input for the a/c clutch. When the clutch is energized, it will turn the fan on. The fan will cycle with the a/c clutch, but will also run at your temperature setting.

 

Windsor,

Thanks for the info. Do you know if DC Controls modules hass the input for the clutch? I have read a lot about the e-fans upgrade, but I have never heard of this and have not seen it in the write-ups (that I can remember). Is this input like a connection for a pin connecter?

 

If the fan clutch is electric, the benefits of an e-fan are a lot less. You won't have the same mileage and power gains that you would replacing an old style clutch fan, but you will get better cooling and A/C performance at low rpm's.

 

It's an 07 FX4. I'm guessing its electric since everything on these vehicles is electric with it's own sensor now. Any other info on the efan install would be appriciated with relation to the sensors, plugs.

From what I understand I can rent a fan clutch tool at Advanced or Auto Zone. The removal of the stock fan.clutch, is this pretty straight forward? any pics and detailed instructions on this would be appriciated.

Thanks

 

I don't know if the DC controller has provision for it, but you could hook the fan up with a relay off of the hot wire to the a/c clutch. That's all these other controllers do anyway. But you have to spice into the wire going to the compressor. I have e-fans and there is a wire harness to the OEM fan that I've left disconnected. While I haven't tried, I'm sure that harness could be used to power a single electric fan with a relay as well.

As to power savings, the electric clutch works similarly to any fan clutch, all the electric component does is lock the fan in where others employ a thermostatic coupler. It's still going to provide drag on the engine. The PCM triggers the lockup on the OEM fan at 205 degrees. That temperature threshold can be changed in a tune.

 

Yes, when the mechanical fan is running, there's drag. An E-fan will load down the alternator, causing drag too.