Whistling noise in AC
#1
09-13-05, 06:33 PM
Whistling noise in AC
Have had the system for 4 years. Almost everytime it starts up,
I hear a loud and very high frequency whistling noise for 15-20 seconds
somewhere near the compressor just inside the wall.
HVAC guy could never figure out the problem years ago and it's
time to try again.
Is this common? Anyone know possible causes?
I hear a loud and very high frequency whistling noise for 15-20 seconds
somewhere near the compressor just inside the wall.
HVAC guy could never figure out the problem years ago and it's
time to try again.
Is this common? Anyone know possible causes?
#2
09-13-05, 06:42 PM
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Whistling
if its comeing from wall could it be a air leak in your duct system most duct in homes are not sealed and air can blow out the drives that hold the two pieces together making a Whistling . if this is the case get some duct seal and paint it out .
#4
09-13-05, 07:57 PM
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Noise
If the lines from the outdoor unit are in the wall near where you hear the noise, it could be the sound of mixed gas & liquid refrigerant in the high pressure line. After a few seconds to maybe a minute, the gas & liquid are separated & the noise goes away until the unit has been off for a while & comes back on.
#5
09-13-05, 09:06 PM
Originally Posted by Grady
If the lines from the outdoor unit are in the wall near where you hear the noise, it could be the sound of mixed gas & liquid refrigerant in the high pressure line. After a few seconds to maybe a minute, the gas & liquid are separated & the noise goes away until the unit has been off for a while & comes back on.
Is there a fix?
Last edited by timmyg123; 09-14-05 at 05:13 AM.
#6
09-14-05, 03:14 PM
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Timmyg
No cure I am aware of, sorry. You might want to have the refrigerant charge checked but I doubt seriously it will make a difference.
I know it won't make you feel any better but mine does the same thing. When I hear it, I think "OK the A/C is working".
I know it won't make you feel any better but mine does the same thing. When I hear it, I think "OK the A/C is working".
#7
09-23-05, 06:14 PM
I ran into this some years ago, it was on a york system. The freon would go through the lines a littler quicker.
The fix was (as silly as it sounds) to put mufflers inline between the compressor and coils on the outside unit. (as per york they had to be silver soldered)
we had 3 of these in 1 house and it drove the owner nuts till it was fixed.
After the recharge and startup there were quiet as a mouse.
Rob
Retired due to injury HVCA Tech.
The fix was (as silly as it sounds) to put mufflers inline between the compressor and coils on the outside unit. (as per york they had to be silver soldered)
we had 3 of these in 1 house and it drove the owner nuts till it was fixed.
After the recharge and startup there were quiet as a mouse.
Rob
Retired due to injury HVCA Tech.
