Question about 2004 Nissan XTerra

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Air Condition When air conditioner is turned on it makes a vibrating sound, and it gets colder only when the vehicle accelerates

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Check your compressor mounting and belt. Loosely mounted compressor will rattle when the magnetic clutch engage. A compressor with loose compression (defective valves or out of specs clearances) at any speed will not result to giving you cool air since the the required pressure ratio will not be met. The suction pressure will always be higher than normal and the discharge pressure will be lower due to the by-passing compressed gas.

Posted on Nov 13, 2011

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It sounds like a loose compression compressor.

if the compressor is loose compression, normally it sounds noisy. then suction pressure is above normal and if you accelerate and maintains that high speed, let say 2000 rpm, the suction pressure goes down to the normal level and cools your air conditioning .

tnx 4 using fixya...

drcool

Posted on Aug 29, 2008

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