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Not cold enough

azlincoln79 on Tue June 10, 2008 11:35 PM User is offline

Year: 1999
Make: Ford
Model: F-250
Engine Size: V-10
Refrigerant Type: 134
Ambient Temp: 101
Pressure Low: 35
Pressure High: 175
Country of Origin: United States

This ac had a vent temp of 55 degrees and it just wasn't as cool as it was last year. So I put a can of 134 in it and it went up to 60 degrees. Also it does not seem to move as much air as it did last summer. I pulled the glove box open while the engine was running and could feel a lot of heat coming off the heater core but I guess it is designed like that. Any suggestions?

Chick on Wed June 11, 2008 7:07 PM User is offlineView users profile

You may have overcharged it, allowed air into the system etc.. Have the system evacuated and recharged to the factoy specs (weight) A lot of things affect cooling, you have an engine fan where the clutch may be worn out and due to be changed. Also at 101 degrees 55 degree vents on high fan is pretty good, once it's properly charged, check the vent temps on lower fan speeds and you'll see the vent temps drop..Of course in 101 degree temps, you don't really want low fan speeds, except on the highway when you have the air flow over the condenser..Hope this helps..

Email: Chick


Freedoms just another word for nothing left to lose

azlincoln79 on Wed June 11, 2008 10:45 PM User is offline

Ok thanks for responding I will check the fan clutch.

azlincoln79 on Tue June 17, 2008 2:41 PM User is offline

I checked the fan clutch and it seems ok. It will not spin very far by hand. I hooked up the gauges and it had 120 on the high and low sides. After the engine was started the low side was 70 and the hi side was 225. I put a water hose on the condenser and the hi side went down to 150. Then it stayed at 30 low side and 150 high side. After driving a couple of miles the vent temp is 65 and its about 100 outside. The lines by the drier were turning icee I don't know if that was the water I was spraying. The condenser fins had a lot of bugs that i washed off and the fins look to be bent over a little in a few spots Any suggestions?

bohica2xo on Tue June 17, 2008 2:52 PM User is offline

Clean the condensor. Pull the grille out if you need to. Use a strong surfactant like Simple Green or Zep Citrus. Spray it deep into the fins on a cold condensor & let soak for a few minutes. Flush it out with a garden hose, & repeat. Small bugs get lodged deep in the fins, and it may take a few tried to dissolve them all.

Fan clutches wear out. The fan should roar when cold, and it should roar after idling for 10 minutes with the A/C on & the engine warmed up. Check the FAQ for fan clutch testing info.

You can check the highway pressures by taping the gauge set to the windshield & going for a drive. If your pressures are good, you may have a re-heating issue in the cabin air path.


"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest."
~ Mahatma Gandhi, Gandhi, An Autobiography, M. K. Gandhi, page 446.

azlincoln79 on Sun June 22, 2008 8:56 PM User is offline

Bought and installed new fan clutch no help. Still blowing the same 60 vent temps hardly any air movement. Pulled the blower motor out and the condenser was pretty dirty. Sprayed it with the water hose and am getting 3 times as much air out of the vents. Will drive it tomorrow and see how it cools. Thanks for the help.

MrBillPro on Sun June 22, 2008 9:31 PM User is offlineView users profile

Originally posted by: azlincoln79
Pulled the blower motor out and the condenser was pretty dirty.

You mean evaporator correct?

Don't take life seriously... Its not permanent.

azlincoln79 on Sun June 22, 2008 9:44 PM User is offline

Yes sorry

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