2006 Suzuki aerio
The AC is turning on but only blowing hot air on cold and really hot air on hot. Freon was put in 4 days ago before this started happening. What could be going on??
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AC dead. all the time? truly all times. 1: does the fan blow? full speed. 2: does AC work on a hot day and a cold started engine? y/n 3: did you check the freon pressure, with the cheap refill kit that has a gauge with the kit and hose. is the gunge reading zero? 4: you start engine, and open hood and look at the AC compressor. is the fan belt to that compressor turning, or is the belt missing. if turning is the AC pulley spinning, that is not just the pulley but the compressor front part and its main shaft, are they spinning.? if not the AC clutch is disengaged. if disEngaged, that means the AC logic box, is not happy. The AC logic box can shut down the AC for 4 or more reasons. and to find that , I stop here. the fsm shows the pins on the logic box to see with logic input is failing. on my car, its: 1: A/C on , switch is off. 2: fan not on, or power to it dead, no fan the logic cuts the compressor so the core dont freeze up and crack. 3: engine overload 4: engine overheat. 5: freon pressure too high. 6: freon pressure too low. 7: too cold outside, so shuts down , has to be extreme cold, RTM. at the least. all this logic functions, save fuel and save other parts from damage. and huge costs.
If your compressor is working the low side should be 15-38 psi. If you have 100 psi that means the compressor is not doing what it should. Make sure the outer clutch is engaged with the pully. If not A/C system check should be done.
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