[garland]

I have recently acquired a 2003 ford expedition. It runs fine except that the ac does not work. The previous owner told me that the problem was connected to the radiator fan and was a $300 fix from a mechanic. What can I do to check to fix this problem myself?

[phantom]

Expeditions have a regular fan with a fan clutch. Does the ac compressor come on at all ?

[mark v]

I never believe these stories, if they were true they would of fixed them to sell the vehicle for more money.

[garland]

The ac compressor does not come on at all.

[garland]

The Expedition was given to us and was told to the previous owner that the ac was a $300 fix so
I do believe his story about it being connected to the radiator fan and as far as I know the compressor
does not come on at all. Thanks

[Kruser]

Originally Posted by garland

as far as I know the compressor does not come on at all.

What have you checked on it? Are the fuses all good? If the freon has leaked out, the compressor will not engage.

[Skyhawk]

What experience have you had with auto mechanics? Start with a test of the pressure in the A/C system. As stated above the low pressure switch would prevent the A/C compressor from engaging if the refrigerant pressure is low, or zero. If the pressure is low then there is a leak in the system as the A/C system is a sealed system. If there is more than 20-30 PSI in the system then check the connection at the clutch coil for battery voltage (12 volts+/-). Generally if the system pressure is below 20+/- psi then the low pressure switch will not let the A/C engage. Look at the A/C connections for black oily dirt. This is the sign of a leak as the A/C oil is very fine and attracts dirt. Look at the condenser, in front of the radiator, for black oily wet spots, that is leaks. Try the defrost and see if the A/C is activated. You can get a simple pressure tester at an auto parts store for a few dollars, or borrow a set of gauges from someone you know. try these few3 things and get back to us. Added thought: read up on how the A/C system works in you vehicle either on line or at your local library. Identify the parts of the system and what they do and how to identify (diagnose) problems.