Re: The air conditioning on my 98 firebird does not blow...
Does the car have a cabin air filter, many late 90's cars do, it may be plugged, if not the AC evaporator core is plugged and will need to be flushed out.
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It depends on the engine that is in your vehicle. It may be threaded into the water pump, it may be threaded into the head, it may be threaded into the engine block, either on the side or the front.
Like I said, it depends on the engine. When you say you've replaced "everything but the sensor and fans" do you mean you replaced the water pump, radiator, and lines?
Did you flush the block to clear any possible restrictions? Have you had a water pump flow check performed? What conditions cause the engine to overheat? Does the heater blow hot air?
It sounds like your blend door isn’t operating correctly . The blend door simply is a flap that is designed to close off heater core when it’s calling for A/C , and opposite for heat . Check to see if it’s operating
Could be a blockage. Get an air-con specialist to blow the lines out. Check for any leaks from the rubber pipes. The twisting nature of AC pipes in cars can perish and if you have heard a blow out (like a tire blowout) the air con might have blown through a pipe.
If you can hear or see the compressor operating, change the thermostat and ensure there's sufficient coolant in the system. If the compressor will not operate when you turn on the air conditioner, you most likely have a leak in the system and have lost sufficient refrigerant to operate it. Most compressors need a minimun of 20lbs of pressure to operate. A lack of refrigerant will prevent the compressor from operating as a protective measure. Although it's possible to recharge the system yourself (products are available to both diagnose the leak and recharge the system) if you're unfamiliar or uncomfortable with doing it yourself, it should be serviced at an authorized service station that does AC work.
If set on COOL No, what causes warm air would be either lack of sufficient air across the indoor coil (plugged air filter or a dirty coil), insufficient air passing through the outdoor condenser coil (dirty fins), insufficient refrigerant in the system (leak) or a plugged metering device (TXV or orifice). You can check the coils and their condition yourself, the other components would need to be checked by a qualified technician.
need more info? Heater blowing cold air? Heater not blowing at all? If neither heat or air are blowing then it's just the blower fan. Easy to replace and fairly cheap.
Freon does not loose it's ability to cool. There is either insufficient
Freon for the size of the system indicating a leak, or the pump is
wearing to the point where it can no longer provide sufficient
compression of the gas. In either case, a trained tech is required and
should be able to provide an immediate diagnosis.
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