Air conditoning doesn't work. Checked the compressor, works good, Fan works but wont turn on. Fuses good. Relays good. Light and switch in dashboard good. Did not check pressure switch yet. seems like an open curcuit. Your thoughts?
Do you have enough freon pressure in the system?if there is not enough charge neither the fan or compressor would work.when there is not freon pressure your pressure swith is open.like you said an open circuit.
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First check that all electrical connections to/from your air conditioning components are tight and secure with no broken or chaffed wires and connectors, or oil swollen connection points. Then check that all fuses and relays involved in the operation of your air conditioning system are operational. If all is good, then remove the belt around the air conditioner compressor pulley. Get a wrench and try to turn the front of the compressor pulley. It should turn with little to no resistance. If it wont move or is very hard to turn, it is probably locked up and needs repair or replacement. If it moves, then the compressor part is OK, but your clutch would likely need replacement. Some model cars its cheaper to just replace the whole compressor than to rebuild the clutch. Jaguar sounds expensive - I would seek out a junk yard. Good luck.
The pressure means nothing as far as the state of charge. You need to have the system completely evacuated and recharged with the specific charge weight for that vehicle. Only then can the pressures or anything else mean anything.
Ac is not blowing out cold air. You have to put gages on the system and it shows its has freon.Checked all fuses and relays. The two fans in engingine compartment do not come on when the ac is turned on but does when the engine gets hot. The compressor engages when turned on also. If the magnetic clutch engages the compressor and still no cold air could be still low in freon or the HVAC unit.
Blower motor not working all the time...if I bang the dash near the glove box, it comes on then works great. Is this the switch assembly, the resistor problem, or should I be replacing the blower motor?
Air conditioning systems sometimes leak down and won't turn on when the refrigerant levels are too low.
Lift the hood and listen to the A/C compressor while someone inside the car turns it on.
Does the compressor engage for a second or two and then shut off?
If it does....you need to have your system checked for leaks and recharged.
If the compressor never comes on. Look at the A/C compressor relay. It should be under the hood in a little fuse box with other relays and fuses. When you find this relay you need to see if it works. You can buy a replacement relay and swap it or take it to a parts store and have it checked. Relays are 10-30 dollars and you should have three or four relays of the same type so a real cheap test is to swap a identical relay from an electric window or a defroster. You should see them sitting right next to the A/C relay if you have them.
It sounds like your cooling fans are not working.Need to check the cooling fan fuses,and the cooling fan relays.There is also a high side switch mounted somewhere on the high side of the ac system that cuts the fans on,or kicks them up on high speed when the ac system gets to high on the high side of the system.This switch may also cut the compressor off.I would check the fuses and relays for these fans first,this is more likely the problem.Is the car running normal temperature? If not the fans may not be running at all.Have them checked.The fan or fans may be bad them selfs.If I can be any more help,let me know.>>email@example.com