Heat Pump Ice Up
Results 1 to 7 of 7
  1. #1
    Join Date
    Feb 2007
    Location
    Suffol County, Long Island, NY
    Posts
    4

    Heat Pump Ice Up

    Have a Lennox heat pump that ices up on me. Have replaced defrost board & checked out refg charge. There does not seem to be a sensor connected to board, and the wiring diagram is un-readable. Fan speed is OK, reversing valve is OK. Can not get it to go into defrost cycle by itself. Need advise & a wiring diagrtam for Lennox HP HP22-411-3P. Also does anyone know what manufacter handles parts for Air Pro heat pump, can not find any in my area.

  2. #2
    Join Date
    Jan 2007
    Posts
    332
    It has a defrost thermostat. It has two, one is for defrost(which is the one you want) and the other is for discharge temp. of compressor(don't mess with that one). Really can't go into much detail since I don't think it is allowed on here, but I know for a fact that is does have a thermostat.
    Believe none of what you hear and half of what you see.

  3. #3
    Join Date
    Feb 2007
    Location
    Suffol County, Long Island, NY
    Posts
    4
    Thanks iwannahelp I will check that out, I wish I had wiring diagram.

  4. #4
    Join Date
    Nov 2006
    Location
    Oregon
    Posts
    853
    Quote Originally Posted by condojack View Post
    Thanks iwannahelp I will check that out, I wish I had wiring diagram.
    Have you tried searching? Lennox makes some of their technical installation manuals public. Go to the installation manual section vs the owners manual section.

    http://www.lennox.com/owners/archived-docs.asp

  5. #5
    Join Date
    Feb 2007
    Location
    Suffol County, Long Island, NY
    Posts
    4
    Thanks Davefr for the info, will give them a try.

  6. #6
    Join Date
    Feb 2007
    Location
    Dubuque,Iowa
    Posts
    11
    As I recall on this unit it is strictly time based defrost. Defrosts according to jumper setting and terminates on thermostat.

  7. #7
    Join Date
    Feb 2007
    Location
    Suffol County, Long Island, NY
    Posts
    4
    MSully thanks for the imput, will put it to good use.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event