LR3 A/C making a humming noise
#1
LR3 A/C making a humming noise
Hi all! I am new the forum and perform a lot of my on repairs on my 2005 LR3. So far the only trip to the dealer was a couple of recalls and when I left my sunroof open. Lately I have started hearing a humming noise coming from my dash when I push the AUTO button for the A/C. If I turn on the ECON mode the noise goes away. I have tried to find it on other websites what could be wrong but with no luck. I hope that the experts here can help!
#2
#3
Hey! I checked under the hood today and did not hear any humming noise as the A/C was on. At first I thought it could be the A/C compressor clutch as it could make that noise when it begins to fail but I have yet to determine that. When I push the econ button on the A/C control panel the noise goes away and I think that is because econ mode engages the air side economizer and shuts off the compressor. As I am driving with the A/C in A/C mode the hum noise get louder as the engine speed increases and the noise comes from the dash area from A pillar to A pillar. I checked the fan at different speeds but it is not making any strange noises. So... I think it could be the compressor but never had to deal with an A/C compressor before and what could fix it. I did read somewhere that there is a chance that an A/C line that has refrigerant flowing through it could have some crap built up in it but not sure what to think about that. What else can I consider?
#4
You need to proper equipment to check your AC. Any A/C service equipped workshop should be able to at least check the pressures, freon levels and so on. There are some pressure operated valves in the dash as well, which there was an upgraded part for. The issue is that it made a fart sound when engaged. Perhaps it makes a different sound when it fails completely. Compressors are known to go bad.
Perhaps you can record the sound, so everyone can render an opinion.
Perhaps you can record the sound, so everyone can render an opinion.
#6
Audio of A/C humming
Hi all! I recorded the sound coming from my dash in my truck. significant sound started at 13 seconds and continued on until 25 seconds or so. I used my blackberry to record the sound and the volume is a lttle low but if you turn it up then it is better. Hope someone can help!
#7
#8
#9
If it was a bearing issue, it would be on the compressor itself, so I would expect you could tell.
Tracing noises can be quite tricky, perhaps you can borrow something like an auto stethoscope. To try and pinpoint the noise. I've looked around on other forums and haven't quite found anything like you describe.
Automotive Stethoscope | AutoZone.com
Let's try something else, and identify parts that might generate a noise.
Tracing noises can be quite tricky, perhaps you can borrow something like an auto stethoscope. To try and pinpoint the noise. I've looked around on other forums and haven't quite found anything like you describe.
Automotive Stethoscope | AutoZone.com
Let's try something else, and identify parts that might generate a noise.
Last edited by unseenone; 03-07-2012 at 12:41 PM.
#10