A\C cold then hot
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New User
Joined: Jun 2004
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From: Texas
A\C cold then hot
I have a 2000 F250 7.3 190,000 miles
The A\C is good and cold when moving down the road. In stop and go traffic there is no more cold, it blow warn to hot air. Ya'll have helped in the past so I thought I give you another shot. Thanks already.
The A\C is good and cold when moving down the road. In stop and go traffic there is no more cold, it blow warn to hot air. Ya'll have helped in the past so I thought I give you another shot. Thanks already.
Lead Driver
Joined: Dec 2003
Posts: 5,250
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Had a similar problem. I have worked on Ford A/C before and didnt even want to mess with it. I bit the bullet and took it to the dealer. For 1g w/ 1 year warranty, it was worth it. Here is a thread to look at:
https://www.ford-trucks.com/forums/s...d.php?t=374265
https://www.ford-trucks.com/forums/s...d.php?t=374265
Freshman User
Joined: May 2005
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I suppose their's a million and one reason's for the A/C to be doing this on you, but mine did same thing and turned out the clutch was stick'n... when your drive'n it gives the added power to boost that clutch to kick in. (in idle it should be easy to see what your clutch is doing)
Senior User
Joined: Sep 2004
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first , you want to check the refridgerant level of the system...make sure it's full and pressure reading are where they are suppose to be. the pressures are the "heartbeat" of the system...they tell you what's going on. if the system is full, you need to check the condenser and make sure it's not clogged with bugs and/or debris, then check the fan clutch operation to make sure it's engaging at lower speeds. your problem could be a combonation of these two things. have a great day !
Postmaster
Joined: Jan 2004
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From: colorado
Originally Posted by fedextech
first , you want to check the refridgerant level of the system...make sure it's full and pressure reading are where they are suppose to be. the pressures are the "heartbeat" of the system...they tell you what's going on. !
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Lead Driver
Joined: Dec 2003
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Take a look under the hood while the truck is at idle. If the compressor kicks on and off a lot, it is low on freon. If its not low, then the problem lies elsewhere. I would take an air hose and blow out the condensor (be careful not to bend fins) to make sure it is as free from restriction as possible.
Ford A/C systems are very aggrivating. I would take it to a shop and pay to have it tested with one of those nice RobinAir machines. It will check everything- leaks, vacuum, pressure on both high and low. Very well worth the $40 they charge around here for the diag.
Ford A/C systems are very aggrivating. I would take it to a shop and pay to have it tested with one of those nice RobinAir machines. It will check everything- leaks, vacuum, pressure on both high and low. Very well worth the $40 they charge around here for the diag.
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Posting Guru
Joined: Nov 2003
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From: Near DC
Mine did the same thing. At about 10,00 miles it wasn't up to snuff. I took it to the dealer and they discovered a leak. The top hose on the passenger side that does a half circle toward the back (high or low pressure I don't remember) had visable wear on the bottom of it. It developed a leak at the wear. The mech put a shorter one of to keep it from touching anything.
Senior User
Joined: Sep 2004
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be carefull using compressed air on cleaning the condenser, as stated you can bend the fins real easy...high pressure water will do the same damage. you can un-bolt the condenser and place a bright light behind it and look thru the front of the condenser for blockages in the fins. it's best to clean it from the engine side...as you will force the debris out instead of further in, if you clean it from the grille side. cleaning the condenser should be done routinely, not when it plugs up. why?...because it's out front, it's the first restriction in the air flow to the intercooler, which has a lot to do with the engine performance ( you want the intake air cooled as much as possible after being compressed and heated by the turbo ), and the radiator will will have a higher heat load from less air flow...which means the fan clutch will stay engaged more ( using horsepower ). just clean the condenser often ! i clean mine everytime i wash the truck.
as far as the pressure reading on the ac system,wlihntr,tell me what you see,i'll try to help you. i'll also need the rpm's, outside and duct outlet temps. this test should be done with the system on max air and hi blower speed
as far as the pressure reading on the ac system,wlihntr,tell me what you see,i'll try to help you. i'll also need the rpm's, outside and duct outlet temps. this test should be done with the system on max air and hi blower speed
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