Results 1 to 11 of 11
  1. #1

    Hmm evap. coil squeeling

    coil squeeling in heat mode outside unit 13 seer goodman heatpump inside coil is mortex coil for mobilehome ahu. cold outside when unit comes on makes loud whistler sound maybe for 10 to30 seconds. loud enough to wake you up.installed 1/2008 changed coil out 2/08 still have same problem. system was bought as match set coil TXV no orfice. install alot of the systems no problems like this if you can help it would be ablidge!

  2. #2
    Join Date
    Jun 2007
    Location
    south carolina
    Posts
    176
    did you change the line set when you changed the system?

  3. #3
    Join Date
    Feb 2007
    Location
    18951
    Posts
    1,593
    Are you sure it isn't a motor squeeling? Never heard of a coil squeeling.

  4. #4
    almost sounds like an obstruction did you get a pressure reading during this phenomenon?

  5. #5
    Quote Originally Posted by super_tech_1 View Post
    did you change the line set when you changed the system?
    yes 7/8-3/8 recommend

  6. #6
    Quote Originally Posted by mike_miester View Post
    almost sounds like an obstruction did you get a pressure reading during this phenomenon?
    yes sound like a restriction psi look ok no sudden swing unit heat ok

  7. #7
    Join Date
    Jul 2005
    Posts
    5,571
    Is it a bi-flow TXV?

  8. #8
    Quote Originally Posted by bobb25 View Post
    Are you sure it isn't a motor squeeling? Never heard of a coil squeeling.
    no not a motor!

  9. #9
    Quote Originally Posted by hvacrmedic View Post
    Is it a bi-flow TXV?
    it post tohave built in checkvalve no noise in cool mode .

  10. #10
    Join Date
    Jul 2006
    Location
    Southern Ca, Elkton Md
    Posts
    7,572
    Defrost?
    "Correct Installation is the Key"

    .1 has killed more HX then Rush Limbaugh

    What is your TESP?

  11. #11
    Join Date
    Nov 2004
    Location
    North Carolina
    Posts
    443
    I ran into an overcharged recip that did this once. Squeeled like a stuck pig. You might try a mechanic's stethascope to pinpoint the loudest point.

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