I've got a 2007 Hyundai Elantra that's got a mostly-functional AC, but consistently blows warm air when at lower speeds (or idle) on warm days.
So far, I've tested the following:
- I press the A/C button and I see under the hood that the clutch starts/stops spinning
- When I drive on the freeway, the A/C blows cold 100% of the time
- When I coast downhill at around 40 mph, the A/C begins to blow cold
- I got one of those all-in-one A/C refill canisters from O'Reilly and before I even tried to add refrigerant in there, the gauge told me the pressure is normal (so I ended up returning the refill canister)
- The condenser fan sounds louder than I would expect (compared to my other vehicles -- a minivan and a V8 truck)
Another thing I noticed just the other day is that when idling in my driveway, the A/C clutch stops/starts randomly -- I'm not sure if this is a sign of a bad clutch, or something thermostat-triggered.
I'm starting to think that the condenser fan needs to be replaced. Would you agree? Or should I swap out the entire compressor (since swapping out the clutch would basically require removing the compressor anyways)?