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Re: the air conditioner is non functional. the blower...
the compressor does not have its own fuse but you will find ther are sensors on the low side and high side one will shut the air con of it itgets to hot and the other shuts off if thegas is too low would be worth to find out how mach gas (freon) is in your car
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locate and remove the a/c fuse. Use an ohm meter and check across the two prongs on the fuse for continunity. If the needle on the meter moves when checking the continunity of the fuse, the fuse is good. If the fuse is good you either have low freon pressure. Low freon pressure due to a leak in the a/c system will cause the a/c compressor not to turn on. This happens because your a/c system has a low pressure sensor that will prevent the compressor from turning on in order to protect it from burning up. If you have enough freon in the system which can be checked with an a/c manifold gauges then you probably have a bad a/c compressor. Hope this information helps.
I would recommend that you check the fuse panel in your vehicle and make sure that the a/c fuse is good, then I would recommend that you raise the hood, turn your a/c on in the car, and then see if the compressor is cycling on and off. If the fuse is good, then there is a chance that your compressor is low on freon, so you should check this, and if it is low, then charging it should resolve the issue. The second problem is finding out where the leak is that caused the system to lose freon. To do this you will need to add dye to the system and see where it leaks. If the freon level is where it is supposed to be, then you may be looking at a faulty compressor, and will need to replace it, and with that you will need to recharge the system.
if the compressor is turnning it could be you have developed a leak,or it could be that the air door which separates the heat from the ac is stuck open.vacume problem.if the compressor is not turnning it could be your low on freon,or an electrical issue.like a fuse or relay.
Well yes, there is a separate switch. If the A/C system is low on freon, the low pressure switch will keep the compressor from engaging to save it from damage due to no lubrication. The freon helps with lubricating the compressor. Get you a can of 134a from the parts store and add a little to see if the compressor will come on. It should come on before one can is used. Now for the freon to be gone means you have a leak. So if the can gets you cooling, try to find the leak so you can stay cool.
Look around the compressor or by the lines into the firewall a glass indicator this is the freon level indicator. If it is clear you may be low on freon, pssible leak. The compressor will not run with low freon.
First thing to check is the fuse. Next ---If the freon pressure is low the compressor clutch will chatter. If the freon is all gone or very low, the pressure switch in the system will not allow the clutch to get power, so will not turn on. Or it could be the switch in the dash board. If you pull the electrical connection at the clutch, then with separate wires and alligator clips run power direct from batter to clutch --the clutch will throw in if it is good. If so, you will know it is probably the pressure switch. If you have good pressure, then it could be the pressure switch itself has failed.