AC compressor makes a loud noise and


  #1  
Old 09-30-10, 03:43 PM
L
Member
Thread Starter
Join Date: Sep 2010
Location: usa
Posts: 4
Upvotes: 0
Received 0 Upvotes on 0 Posts
AC compressor makes a loud noise and

shakes when it shuts off, sounds like its a spring backlash? Its brand new the AC guy said its normal? anybody know anything about this?
 
  #2  
Old 09-30-10, 05:22 PM
C
Member
Join Date: Aug 2008
Location: Texas, California
Posts: 1,410
Upvotes: 0
Received 7 Upvotes on 7 Posts
No, It is not normal. Get it replaced.
 
  #3  
Old 09-30-10, 06:54 PM
L
Member
Thread Starter
Join Date: Sep 2010
Location: usa
Posts: 4
Upvotes: 0
Received 0 Upvotes on 0 Posts
the compressor is "brand new", is it possible that it was installed incorrectly?
The old one did exactly the same thing, called an AC repair man when the wiring connecting to the compressor got fried, he said the compressor was shorted, and needed replacing, he removed it, and left with it to retrieve the new one, he was gone for a couple of hours, and installed this one that works, and yet, acts identical to the old one, could he have reinstalled the original?
 

Last edited by LM213; 09-30-10 at 07:11 PM.
  #4  
Old 10-01-10, 08:22 AM
C
Member
Join Date: Aug 2008
Location: Texas, California
Posts: 1,410
Upvotes: 0
Received 7 Upvotes on 7 Posts
If it acts the same way, it does sound fishy. I'll double check to make sure he did not rip you off. if you can not check yourself, call a second opinion. (Does the old one always shake with spring sound? even when it was new ??)
 
  #5  
Old 10-01-10, 11:50 AM
K
Member
Join Date: Oct 2010
Location: United States
Posts: 57
Upvotes: 0
Received 0 Upvotes on 0 Posts
The compressor could have bad valves which causes the pressure to equalize through the compressor when it shuts off.
 
  #6  
Old 10-01-10, 11:59 AM
Former Member's Avatar
Member
Join Date: May 2006
Location: US
Posts: 734
Upvotes: 0
Received 1 Upvote on 1 Post
Get your favorite HVAC tech to put his gauges on the unit and observe the pressure readings when it shuts down. Some noise IS normal when a compressor shuts down but if you are having some type of unusually loud and violent episode then it needs to be checked.Your unit may have a bad check valve in the system that is causing the noise. A lot of older heat pumps utilized 2 TXV's each having a internal one way valve valve. Llike any type of mechanical device the check valves can and do malfunction. It should be a fairly easy diagnosis if you can find someone with the inclination to try. NOTE: I have also seen miswired reversing valves that can cause the same type of noise so have your tech check that also.
 
  #7  
Old 10-01-10, 12:58 PM
L
Member
Thread Starter
Join Date: Sep 2010
Location: usa
Posts: 4
Upvotes: 0
Received 0 Upvotes on 0 Posts
Thank you all very much, this was great help.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: