Fixed...


Fwiw....

On a typical day, my thermometer reads 40 degrees right on the button (Norm A/C w/Recirc.ON). Btw...I leave a probe (dial-gauge) thermometer in my vent just in case I need it for a Service call for a customer.

 

Thanks...

As for the cooling, I did have to recharge the A/C in the 95...but that was because it tried mowing over an 18 wheeler and failed...when they pulled the core support off of the truck and then replaced it, they didn't recharge the A/C or put Coolant in it...I had a 95 SuperCab and an 05 SuperCrew, the A/C in the 95 was cooler, then again, the SuperCrew is a lot bigger on the inside...

FWIW, my 95, built in 1994, had R-134a in it...

 

I have an 04 F150 Lariat, in S Florida and on those high humidity high temp days, I don't have an issue with the Ac. It works great. My opinion is the cabs take a lot to cool them down. I use the recirculate till the cab cools down then switch it over to outside air. The recirculate will cool the cab down quicker then when in normal outside air selected.
So I really don't know why some say they are the worst in the industry. I have no complaints.

One thing to add I do have the drivers and passanger windows tinted the same as the rest of the truck, so I am sure this helps.

 

Kevin,

With your high humidity, it will take some time to cool down. The system first condenses moisture from the air (water under truck) then the cooled dry air is routed into the cab. On recirc. it takes in the already dehumidifed air and cools it some more; thus it is a quicker cool down. I would expect about 60 deg air on a hot humid Florida day. Also the flow of air over the condensor is a factor (big) if you are moving it is better than when stopped.

 

Funny thing I noticed, On my 06, I can get it down to around 45 or so, but then if I back the fan down, just off of high setting, the temp drops down even colder to 40. I would have to agree that these compressors defintely are not the same ones used on pre-04 trucks.
Rich

 

i've semi-noticed that too...if i turn the blower down and pull it off of MAX A/C, but leave it on recirc, it runs fairly nice...

 

A little off subject here - could this freezing of the evaporator in any way cause an overheat condition? I have an '00 Excursion (V-10) who's temp gauge will peg out after about an hour of driving in "MAX AC" mode. Switch to regular a/c and temp gauge goes back to normal range within about 30 seconds. When running a/c in normal mode, no temp gauge fluctuation. Dealership says to replace the gauge cluster ($850+).I haven't been able to get any help in the Excursion Forum. So now, we simply don't use max a/c. Any wisdom would be helpful.

 

other than a thermostat issue, idk...could be a coolant line leading to the a/c clutch...and you put in back on Normal A/C, it slows the system down hence less heat...

 

Should have included that the thermostat was the first thing I tried replacing, after that it was the temp sending unit - no help. These were the inexpensive "hope this fixes it" best guesses. Now I stumped. Can't believe it's the instrument cluster when it only does it in max a/c. No coolant leaks, checked several times.

Does anyone know of a way to temporarily install a secondary temp gauge without disconnection the factory one? I would like to troubleshoot by seeing if the coolant is indeed getting hot, or if it is an electrical gremlin affecting the factory temp guage.

 

That is a little strange. I don't think there is any way a frozen evap coil could cause the engine to overheat. But there are some other possibilities. First thing (I don't know about the Excursion specifically) but generally, all 'MAX AC' does is put the system in recirculate mode so you are pulling in cool, dehumidified air from the cabin, not hot, humid air from outside. I would think the AC cooling load in 'MAX' would be the same, or possibly even lower than running in normal, but it really shouldn't be any more in MAX. Second, I am curious about the 'driving for an hour in MAX AC' statement. About any vehicle I have ever had would be suitable to hang meat after driving for an hour in MAX. Granted, the Excursion is a big cavern of a vehicle, but if you aren't getting good performance out of the AC, maybe the condenser coil and radiator are dirty or somehow plugged which might lead to a little extra heat pushing it over the edge and the engine overheating. One thing that makes me think it's not electrical is that you mention it takes an hour to move the gauge. I would think something electrical, like a bad ground, would cause the needle to move over the course of just a few seconds. As far as adding a second temp gauge, that might be possible by using a "T" fitting off the engine block. Another option might be to get a cheap non-contact thermometer:

http://www.harborfreight.com/cpi/cta...emnumber=91778

Then you could just look at a couple of points like the radiator, engine block, heads, etc and get a pretty good handle on where the temp is. Plus you could compare difference in upper and lower radiator hoses and see how much cooling the radiator is actually doing. The easiest thing might be to take a trip to the car wash and gently wash out the condenser coils and radiator, make sure nothing is blocking the air flow (leaves, bugs, etc), there aren't a lot of bent fins on the coils, and all baffles and shrouds are in place, to properly direct the air flow.

 

I moved from a 2001 Ford Taurus w/100,000 miles on it to my 07 SCREW f150. I've also noticed that the A/C on hot days seemed MUCH colder in my Taurus. It's starting to get hot now here in GA and I'm noticing that the AC on the truck will eventually get cold enough on recirc, after it's been moving for a while, but the air that I feel coming out of the vents hitting me in the driver's seat is just not as cold as the Taurus. A co-worker picked up an 07 just before me and said the same thing - he loves the truck, only complaint in comparison to his old one (a dodge) was that the AC didn't get as cold.

It will do the job eventually, just takes longer and is not as cold when first starting off, or in traffic.

 

Wheel1a I'm not an idiot I realize It's harder to cool a supercrew than a reg cab.I'm going by how cold the air is coming out of the vent when I put my hand next to it,and the '94 has 134a in it not R12 in it.I'm rating the ac performance of my 04 against other vehicles I've owned in the past also such as my wife's windstar which had more window's and more cabin space than my supercrew and the windstar did not have rear air.Which bring's up another issue I have with the 04.Why didn't ford put rear in the back of the console like they do in the explorer's or chevy or dodge does in their extra cab's?I think that would help more than the crappy vent's that they put under the seat's.I've been a ford truck man my whole life and probably alway's will be but i'm not very satisfied with this one they're to have to improve them alot before I buy another new one if I ever do.

 

My a/c was also very weak. After reading a lot of posts on the 04's being undercharged out of the factory I figured I would give it a go at the dealership. Well they told me it was a little undercharged and added Freon. Big difference now. Gad I decided to run it by them. These systems are not arctic air blowers but when running proper they are sufficient. EVL150 my truck has air vents in the console blowing into the rear passenger compartment. What model do you have? BWEP

 

I did not want to insinuate that you were. Sometimes people overlook the simple things.

 

I have an 04 screw FX4 with the center console and shifter. I have two vents on the back of the console and vents under the front seats. It depends on the options you go with. Also I live in central florida and have not hade an issue with my ac. Blows as cold as my 95 f150 did.It just takes a few minutes to cool all that space in the Supercrew. I also have my front windows tinted. If you have the rear vents you could shut them to push more air out the front. If no one is in the back, even if thier is some one back there.screw them, as long as the captin is cool.