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Be aware of Aircon compressor noise

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priyana:
Mine was a humming sound, no screeching.
But the pitch goes up and and down according to rpm.
Even at neutral, when rev-ing you can hear the hum and its pitch.
At Riverview they use a long socket spanner and touch at each part of the enginee (alternator, compressor,etc), and the other end to the ear or just feeling the vibration.
With that he can tell which part is vibrating the most when rev-ing.

BTW, if you set your aircon at 28 deg, it is quite normal that it cut in and out.
afterall the aircon has to maintain the "warm" you set.
You should be setting it at 24 or below.

Latiorarri:

--- Quote from: priyana on June 16, 2009, 09:33:03 AM ---Mine was a humming sound, no screeching.
But the pitch goes up and and down according to rpm.
Even at neutral, when rev-ing you can hear the hum and its pitch.
At Riverview they use a long socket spanner and touch at each part of the enginee (alternator, compressor,etc), and the other end to the ear or just feeling the vibration.
With that he can tell which part is vibrating the most when rev-ing.

BTW, if you set your aircon at 28 deg, it is quite normal that it cut in and out.
afterall the aircon has to maintain the "warm" you set.
You should be setting it at 24 or below.

--- End quote ---

Oh okok.. lunch time i will drive out again see if i can narrow down the source of the sound.. i tried setting at 21 also like that.. :( this happened after my ambinet temperature sensor was replaced.

DL70:
can be due to aircon filter (condensor choke). replace the condensor, around $50 I think, and not the compressor...:)

Enzoni:
when aircon compressor up lorry, u can hear an unique sound which u dun normally hear when driving.  Sounds abit like air suction.  Can hear when u step on gas or brake.  But when u off compressor by pressing A/C button, the sound immediately gone.

The high pitch screeching sound which u hear very loud when out of car but not when driving is the fan belt problem.

The hissing sound like air leaking can be cooling coil leaking or not enough aircon gas.

row21:
Hey Enzoni,

high pitch screeching sound - i only hear it when i start my engine... after 5 mins.. the sound gone... tat aso fan belt problem?

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