How do you know you don't have a bad a/c clutch and the compressor itself is OK?

If the compressor is seized, then the belts will squeal loudly when the compressor is engaged. IF the system is low on refridgerant, you'll need to test the compressor by jumping the low-pressure switch (provided its low on freon). If the belts squeal in this mode, then the compressor is seized.

If you can't get the compressor to squeal under any condition, then you ought to get the clutch checked first BEFORE assuming the compressor is seized. (Obviously the clutch needs power to engage, check your fuses and the relay).

Did I miss something? Anyone want to add something?

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84 300DT Puke Yellow. Totalled after 438,000
84 300DT Orient Red. 169,000 (actual mileage may vary)
2002 Explorer EB (wife's)