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yes I know about the low pressure switch but was wondering on these newer vehicles do they have any sensors right at the compressor near the clutch maybe in the wiring, thanks for your answer anywaysyes I know about the low pressure switch but was wondering on these newer vehicles do they have any sensors right at the compressor near the clutch maybe in the wiring, thanks for your answer anyways
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Insert the square tip of a 1/2-inch socket wrench into the square hole in the center of the serpentine belt's adjustment pulley. The adjustment pulley is the smallest pulley the belt wraps around.
Pull the adjustment pulley toward the engine with the socket wrench to release the tension on the serpentine belt, then pull the belt off the air conditioning compressor's pulley.
Remove the bolts which secure the air conditioning compressor to its mounting brackets with an open-end wrench, then position the compressor to the side of the engine compartment. Do not disturb the hoses that attach to the compressor.
Pull the electrical connection off the crankshaft sensor.
Remove the two bolts that secure the crankshaft sensor against the engine with an open-end wrench, then slide the sensor out of the engine.
Slide the new crankshaft sensor into the engine, then install and tighten the sensor's two securing bolts with an open-end wrench.
Press the electrical connection onto the crankshaft sensor.
Position the air conditioning compressor against its mounting brackets, then install and tighten the compressor's bolts with an open-end wrench.
Pull the serpentine belt's adjustment pulley toward the engine with the socket wrench, then position the belt onto the air compressor's pulley. write up found @ehow
How old is the vehicle? Some AC systems have a pressure sensor that tells the system if the refrigerant is low. If it is low, then the clutch for the compressor disengages from the drive belt so the the compressor does not run needlessly. This is to protect the compressor from unnecessary wear.
It sounds like your air conditioning compressor or air conditioning clutches have gone bad the solution is to have rebuilt (or buy a rebuilt)air conditioning compressor. Do not attempt to work on thr compressor yourself unless you are certified in air conditioning, gas in system can kill you if you breeth it in.
The test is a simple one, with engine off and cooled down test the pulleys by hand, turn them slowly in the direction of rotation and feel for a binding sound or feel, if you feel a noticable bind and noise your culprit is the pulley or the a/c compressor.
Test whatever else runs off this belt as well by doing the same test.
That "thing" is part of the compressor clutch. When it’s spinning the clutch is engaged, when it stops the compressor is off. If it’s constantly cycling, you probably don’t have enough freon in the system. But remember, however the gas escaped before, it will escape again, unless you fix the leak.
You really want to troubleshoot your AC. Here are some items to follow:
1- Make sure your Compressor clutch work first. You can jump the wire to test it when the engine is off.
When you know the clutch work then you can look for the other things not makeing it activated.
2- It it doesn't work then you know the problem right there.
3- If it works then check the Low and high pressure according to compressor spec.
3- Check your engine temperature sensor. Don't think that your temp reading gauge is coorect then your engine temperature for your AC is working.
4- Check your compressor sensor speed. It has to be in sych with your crankshaft sensor before it allows the clutch engaged to prevent burning your compressor when it is locked up is in freezing mode ( ex.in case some clever people jumping wire to control the clutch bypassing all other rerquirement).
5- If you think these items need to be addressed by professional better then do-it yourself then I have no objection. Good luck on trying.
You could have possibly lost all the r134a refrigerant from the system, and with no a/c pressure, the pressure sensor will not allow the compressor to engage, or you could have a faulty a/c pressure transducer (pressure sensor). Check your refrigerant charge first. If it is properly charged, then your pressure sensor could be the problem.
I do not think it does but was just checking to make sure.
yes I know about the low pressure switch but was wondering on these newer vehicles do they have any sensors right at the compressor near the clutch maybe in the wiring, thanks for your answer anyways
I am attempting to help my friend with his Tahoe
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