My mustang's AC stopped working so I checked the freon, and it is good, the power to the condensor, and it has voltage acordingly, however the clutch is not getting power to it to engage. Any ideas? Thanks
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Usually when AC clutch doesn't engage is symptom of low freon. It's a safety feature so you don't burn up compressor. Compressor is lubed by freon and oil. Check freeing levels before replacing anything. Other things to check -fuse (yes that simple, they pop when freon gets low too, when compressor has to work harder than normal) If that doesn't cure issue then have a competent shop look at it... they'll find obstruction, leak or moisture in system in a heartbeat.
FIRST I CHECK ALL FUSES AND RELAY.TO BLOWER MOTOR IF IT STOP BLOWING.AND CHECK FUSE TO HVAC SWITCH CONTROL.AND CHECK FUSE / RELAY TO AC COMPRESSOR.IF FUSE / RELAY GOOD POWER GETTING TO AC COMPRESOR CLUTCH COIL AND LOW PRESSURE SIDE 28 PSI AND HIGH SIDE 200 PSI. CLUTCH COIL IS OPEN.IF REFRIGERANT LEVEL LOW YOU MAY NEED MORE REFRIGERANT.YOU NEED AT LEAST 28 PSI ON LOW SIDE AND 200 - 220 PSI ON HIGH SIDE.IF ALL IS GOOD STILL NO AC PROBLEM COULD BE A FAULTY AC CLUTCH CYCLING PRESSURE SWITCH.
When the ac acts up,test voltage at the ac clutch,if there is voltage(12 volts to 14)then the clutch is the problem,also,try and wiggle the low pressure switch ,to see if it tries to come back on,,,have some one put some ac gauges on the ac system and let the ac run,and watch to see if the low side falls down to 25 psi or lower,if it does,then the orifice tube is stopping up.If this was at all helpful,please rate,thank you.
IS YOUR AC COMPRESSOR DOES NOT TURN ON YOUR MAY HAVE LOW FREON. THERE IS A PRESSURE SWITCH WHICH MUST HAVE A CERTAIN AMOUNT OF PRESSURE TO ENGAGE THE COMPRESSOR CLUTCH. CHECK FREON LEVEL ON THE LOW SIDE. AUTOZONE WILL SOMETIMES DO THIS FOR YOU OR YOU CAN BUY A GAUGE FOR ABOUT 20 DOLLARS. IF YOU HAVE SUFFICIENT PRESSURE POST BACK AND I WILL WALK YOU THROUGH TESTING
first thing to do before you charge it again replace the 'O' rings in back of the compressor also add some a/c oil because that will help the a/c compressor not to rattle this is the way I do mine I put in a can of 134A first and after that I put in the 134A oil and then I put in the rest of the 134A that is needed
I would disassemble the front brakes and check out the wheel bearings and sometime there is nothing wrong with them just need to add bearing grease but if they are scarred or damaged replace them