Heat Pump Outdoor Fan Intermittent

Reply

  #1  
Old 02-23-05, 09:40 PM
jstauffe
Visiting Guest
Posts: n/a
Smile Heat Pump Outdoor Fan Intermittent

I am having a problem with my split system heat pump. It seems the fan intermittently stops working on the outside unit, while the compressor continues to run. I don't think that it is going into defrost mode, because the coils on the outer unit get frostier the longer it runs. If I flip the thermostat over from heat to cool, the frosty coils defrost, so I don't think its the reversing valve either. When it is doing this, and power is applied to the motor, it is difficult to turn(quick touch with a screwdriver thru the grate). When the power is off, the motor turns freely. If I turn it off and let it sit for a while, the motor will come on when restarted. I do think that the problem is getting worse, however.

I am fairly handy, but my knowledge is limited to the few heat pump books I was able to find at the library. In this lack of knowledge, I am theorizing that either the motor or capacitor is going bad. I'm sort of stubborn when it comes to calling/paying for help. My system is old (circa 1991), and I am not financially able to replace it yet.

Anybody have an idea what to try next? How can I check the capacitor/motor?

Thanks,
Jonathan
 
Sponsored Links
  #2  
Old 02-24-05, 12:29 PM
Ed Imeduc's Avatar
Member
Join Date: Aug 2002
Location: Mountain Williams Missouri
Posts: 18,389
Wink

Does the capacitor look puffed out or a bulge can be bad. but most of the time if it is the capacitor and the fan should be on give it a push on the blades and it will run. Then its the cap . You say it locks up Id say its the motor and dont run the unit with out it. Make sure you get same RPM and CW or CCW, witch way it turns also a new cap for the new motor.

might try www.heatcoolparts.com

ED
 
  #3  
Old 02-24-05, 05:26 PM
scottg's Avatar
Member
Join Date: Dec 2004
Location: Wilmington, NC hurricane magnet of the U.S.A.
Posts: 259
I believe that the end play on the motor bushings are bad. With power off to the unit shake the fan blade and see if there is alot of play in the shaft.
No play from side to side and 3/32" play in and out.
If there is more get a new motor and run capacitor.
 
  #4  
Old 02-24-05, 07:23 PM
jstauffe
Visiting Guest
Posts: n/a
Thanks for both of your replies. I checked the capacitor with my ohm meter, and it seemed to charge/discharge normally, from what I have read, so I pulled both the motor and the capacitor. The motor shaft has all kinds of weeble wobble in it, and a good bit of end play. I'll be heading out to a few local stores tomorrow.

Freezing on electric heat in a snowstorm, using my electric meter for a fan. Can't wait to see my electric bill this month!

Thanks again!
Jonathan
 
  #5  
Old 02-25-05, 03:31 PM
jstauffe
Visiting Guest
Posts: n/a
Just bought a new motor and cap ($50 seems cheap!). The new motor allows me to choose direction. The guy I bought the motor from said I have a CCW fan. I'm pretty sure I remember air pushing out the top of my unit, which would make my old motor a CW unit.

How do I know for sure?

Jonathan
 
  #6  
Old 02-25-05, 04:22 PM
Ed Imeduc's Avatar
Member
Join Date: Aug 2002
Location: Mountain Williams Missouri
Posts: 18,389
Wink

Just so when the fan runs it blowes out the top. Make sure it is the sam RPM


ED
 
  #7  
Old 02-25-05, 06:44 PM
jstauffe
Visiting Guest
Posts: n/a
Motor and capacitor installed. Heat pump warming the house nicely now. It runs much quieter too. Good for another 10 years, ha ha.

Thanks for all your help,
Jonathan
 
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