Heatmpump vibrates,shut off emergency heat kick in !

Reply

  #1  
Old 11-08-14, 11:50 AM
Member
Thread Starter
Join Date: Jul 2008
Location: montreal
Posts: 27
Received 0 Votes on 0 Posts
Heatmpump vibrates,shut off emergency heat kick in !

Hi !

MY heatpump have a strange behavior for couple of days. Whe I call for heat on the T Stat The compressor vibrates (and make vibrating noise) and the fan isn't turning. Afetr 3-4 minutes the fan stats but i get no heat (both lines stays cold ). Could anyone can tell me what my problem can be ?

The compressor has been changed last year.


EDIT: Now, for the first time, the heat pump stops by himself after 10 minutes of what i've just decribed (vibration, no heat) and then the tstat switch automatically to emergency heat (the furnace is on)

Thanks !
 
Sponsored Links
  #2  
Old 11-08-14, 12:13 PM
firedawgsatx's Avatar
Member
Join Date: Jul 2013
Location: USA
Posts: 1,727
Received 0 Votes on 0 Posts
It sounds like your heat pump is going into defrost mode. If it is very cold outside when you first turn the heat pump on, the system is probably sensing it needs to defrost. Some heat pump defrost functions work on a timer while others use thermostats to initiate defrost. When in defrost mode the fan shuts off and the emergency heat strips are energized to temper the air inside the house.
 
  #3  
Old 11-08-14, 12:22 PM
Member
Thread Starter
Join Date: Jul 2008
Location: montreal
Posts: 27
Received 0 Votes on 0 Posts
Thanks for that answer !

Is not really that cold outside (around 40 degrees).

20 minutes later, heat is call automatically (to maintain the temp written on the tstat) and the heatpump kicks in normally (heat, no vibrating noise).
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


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