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Chevrolet Tahoe Climate Control AC Problems

28 messages,  Last post on Mar 14, 2009 at 7:00 AM

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What is this discussion about? Chevrolet Tahoe, Heating / Cooling, Truck

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#26 of 28 Re: 01 A/C noise [markanag1] by acking Mar 13, 2009 (1:28 pm)
Replying to: markanag1 (Sep 23, 2007 4:23 pm) With the engine off, turn your compressor clutch by hand and make sure that you don't have any tight spots. The problem could exist from a compressor that might be ready to sieze. Also have the air conditioning tested to ensure that the charge levels are good, overcharging a system could lead you on a wild goose chase of strange noises.
#27 of 28 Re: Freon/coolant? [beckya1] by acking Mar 13, 2009 (1:38 pm)
Replying to: beckya1 (Mar 10, 2009 10:40 pm) Only use virgin R-134a refrigerant. Drop in refrigerants aren't such as dura-cool aren't really safe for A/C systems. Always refer to manufactures spec!
#28 of 28 Re: 01 A/C noise [markanag1] by arrie Mar 14, 2009 (7:00 am)
Replying to: markanag1 (Sep 23, 2007 4:23 pm) What age is your car?   Well, regardless of the age you might have lack of oil lubricant in your A/C compressor,   If the belt "flaps" it probably does it at frequency of pistons moving in the compressor. This would mean that your compressor causes more than normal torque peaks as it turns around.   Unless you have severely over filled you A/C system the first thing I would do is to get a small bottle of A/C lubricant and fill it in and see if it helps.   If you are a little bit hands-ON person go get a A/C kit with refrigerant, oil fill and pressure gauge. These are not expensive and can be found in any car parts store.   First measure pressure by the instructions with the gauge, i.e. run engine with A/C ON for a few minutes and connect gauge on the low side service port (it should not even fit on high side where you NEVER want to connect). Low side service port is in part of the line that gets cold.   If pressure is not too high add oil lubricant again in the low side service port and see if it helps.   If the pressure is too low add refrigerant but you say it works fine, i.e. refrigerant fill should be good and low fill should not cause too high torque on the compressor anyway.   Over filling the system can cause this issue, i.e. you would have A/C refrigerant entering the compressor in liquid form, which does not compress and would cause very high torque pulse. This can cause severe damage to compressor too.   Arrie

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