Question about 1999 Ford F150 Regular Cab

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2001 f150 5.4l supercrew 4x4

Hello i am having the same problem as soon as i stop warm air comes out also when i accelerate a/c air is good very cold but thars my problem that it stops coolin as soon as i stop or accelerate my truck

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Hi Homero956!

With the demise and replacement of R-12 Freon with R-134, which, although less of an environmental problem, is not nearly as efficient a refrigerant, your complaint is VERY common for F150s... Add to that Ford's engine control programming that cuts out the compressor when you put extra power demands on the engine as in when you accelerate firmly or are hauling a big load (cargo or trailer), and the problem is then compounded.

There are some things you CAN DO that will help:

  • Clean the bugs and road debris from the front of the condenser coil and radiator at a self-serve car wash..
  • Make sure the radiator/condenser fans are in good shape, and that all fan shrouding is installed and properly mounted.
  • Have an Auto A/C Technician check out your system. It might be time for a major service which would include a system flush and evacuation, replacement of the drier receiver/accumulator, change compressor oil and recharge the system with fresh refrigerant. [Also - the Ford A/C system uses a fixed orifice tube, and the tube calibration (orifice size) affects A/C efficiency - They are color coded and the F150 has two recommended tube options - the BLUE tube is for normal service and is found in most trucks --- But there is also available the extreme service orifice tube which is color coded RED. If you have this servicing done, that would be the time to change the tube --- Consult your A/C technician for his opinion on this]
  • Finally, you can install one of the many available auxialary electric cooling fan kits in front of the radiator/condenser to further improve A/C (and engine) cooling efficiency. The more air moved across the coils, the better the A/C will perform. Look at Perma Cool online, or in the J.C. Whitney catalog, or check with a local auto supply or performance parts store, just to name a few possible sources.
I hope this helps you out, but bear in mind that the F-150 A/C is not known for keeping people cool....

Don't hesitate to post a comment or ask further questions, and let us know how things go...


Posted on Jun 20, 2008


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