Heat Pump icing up again

Reply

  #1  
Old 12-27-14, 07:11 AM
5
Member
Thread Starter
Join Date: Jul 2006
Location: USA
Posts: 54
Received 0 Votes on 0 Posts
Heat Pump icing up again

I posted last week about my Rheem ( PQL-JEZ model series, 15 seeer) heat pump icing up. The tech came out and replaced the main control board and the sensor. He also check the Freon levels which were good. Things seemed fine for a few days although the temps were on the warm side not really below freezing even at night. Today I noticed that the unit was iced up again in the same way as before. Light ice around the top of the case and also a few inches from the top of the coil. The temp got down to 28 F overnight, not really cold.

I am wondering what else could be causing this? I will call them back out on Monday but donít want to get into a costly trial and error process which already seems to have begun. This unit is pretty new as the parts were under warranty, but paid labor .Any insights would be appreciated.

Attached a pic of the unit from this morning.
Name:  heat pump.jpg
Views: 482
Size:  44.8 KB
 
Sponsored Links
  #2  
Old 12-27-14, 12:07 PM
S
Member
Join Date: Feb 2014
Location: USA
Posts: 2,104
Received 0 Votes on 0 Posts
Oh, your talking about the ice on top? That's not a defrost problem. Take a look through vents on the side's and see if there is ice on the coil.
 
  #3  
Old 12-27-14, 01:06 PM
5
Member
Thread Starter
Join Date: Jul 2006
Location: USA
Posts: 54
Received 0 Votes on 0 Posts
It is the ice on top and the ice on the coil about 2-3 inches down from the top. I saw the ice on the coil this morning by looking not through the side vents but just down past the fan when the fan was not running.

Right now all the ice is gone since it is 6o degrees. This is the same condition that prompted me to call the tech in the first place. I'll keep an eye on it and see how it looks tomorrow am.

thanks for the reply
 
  #4  
Old 12-28-14, 08:57 AM
D
Member
Join Date: Dec 2012
Location: United States
Posts: 247
Received 1 Vote on 1 Post
Idle speculation:
If you observe the melting of the ice from the beginning to the end of a defrost cycle, does the ice melt from the bottom first and gradually move to the top coils ? If so, then maybe the defrost cycle is terminating prematurely so that the top coils never get cleared of ice .
Perhaps there is a setting / jumper that establishes defrost duration which could be set to extend it to ensure complete clearing of ice ...
 
  #5  
Old 12-28-14, 02:25 PM
5
Member
Thread Starter
Join Date: Jul 2006
Location: USA
Posts: 54
Received 0 Votes on 0 Posts
No icing today, temps again in the high 50's. The tech said when he was here that the unit was not going into the defrost cycle. He pushed a button and that sent it into defrost but it would not come back out. This is when he decided to put in the new board and sensor. The icing I saw yesterday was exactly like what I saw before the tech came out.

Will be calling them back tomorrow, thanks for the reply
 
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
 
Ask a Question
Question Title:
Description:
Your question will be posted in: