Sometimes when it is really hot out I dont get AC in park. Anyone else had this problem?

 

same here, not until I get rolling for a bit does it start cooling.

 

Only does it when it is really hot outside and you need it the most!

 

Mine does it too. If I drive a short distance, even just a mile, and park it works fine. But, when I first start it and turn it on it blows hot.

I took it in to the dealership when it ofrst happened summer 08 and they changed the fan clutch. It seamed to be better but it still does it.

 

Yea it must be normal because ive had about 10 people tell me theres does it to.

 

05 here does it also. If you want air you gotta keep movin. Noticed the compressor cycles on and off while parked. Wonder if it does at speed? Been thinkin bout hookin up a switch to keep the compressor goin while parked but don't know if this would damage the pump.

 

The compressor cycles because it has high and low pressure switches to keep the pressure within range. If you stop it from cycling you can damage it.

You could add an efan to the condenser coil, that would make the most difference.

 

Why does the high outside temp make it stop altogahter?

 

My 94 F150 SCab did the exact same thing. I just lived with it. My 2007 seems to work just fine.

 

my 2008 does it too, seems like as soon as i start rolling it starts cooling. mostly when i first start it though. guess it's a ford thing.

 

If high temps make the compressor stop cycling completely, but otherwise work at lower temperatures, it is probably overcharged with freon. That would be the high pressure switch stopping it from running.

Freon expands or contracts at a very high rate with temperature changes. You can measure the pressure of a drum of freon at, let's say 70 degrees. It may say there is 200Hg of pressure in the container. But then measure the same drum at 100 degrease, and it may have 300Hg of pressure. That is what makes freon work as a good refrigerant is the expansion and contraction of the gases.

 

06 XLT and I have the same problem... however if i lightly press the pedal to get the RPM's up, the AC cools down a little.

 

My 99 and 01 were like a freezer. The 07 and now the 05 I have, are only cold while movin.

 

I have a 05 fx4 that seems to be not so great with the AC right after start up sitting in the sun. It actually feels like its blowing hot air until i start moving then it gets cool. Are yall saying that this is normal? My 4x4 also doesnt come on...I know there is a fuse for 4x4 noid and the ac compressor. I havent had a chance to pull it and see if its blown yet but if it was the ac would never cool off right? I am also going to check the freon....but it just doesnt seem right thats its hot until you start moving. I have a 06 mustang it does not have this issue.

 

Yep mine does the same thing, if its REALLY hot out, 95+ it will not cool until you put it in drive. My 4x4 works fine though. Because my AC is fine otherwise I just consider it normal.