ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
sec cable code conflict
by HotLine1. 11/20/18 03:08 PM
This anti-theist is priceless!!!
by Texas_Ranger. 11/17/18 02:15 PM
High current GFI vs regular GFCI
by Texas_Ranger. 11/17/18 02:07 PM
Single phase and what you call it.
by dsk. 11/12/18 11:10 AM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 29 guests, and 27 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Strange Behavior by Electric Fan Motor #164564
06/06/07 09:30 AM
06/06/07 09:30 AM
Retired_Helper  Offline OP
Member
Joined: Mar 2007
Posts: 165
Maine
This might well be a ridiculously easy question, but please keep in mind I have essentially no idea what goes on inside an electric motor. My sparky handled the brain work; I ran cable and did very simple installations.

I have a residential-quality fan on a floor stand that can run 24 hours a day in the hot, humid weather (oh, yes, we have that in Maine). It hibernates in the winter. Back in use now, infrequently when you switch it on, the motor hums, but the fan blades don't turn. If you leave it alone, and let it keep humming (not something I'm comfortable with doing), eventually it starts operating normally.

What do you think is going on here, and what should be done (other than taking the fan out of service and recycling what parts I can)? sick

Thanks, all!

Tools for Electricians:
Re: Strange Behavior by Electric Fan Motor [Re: Retired_Helper] #164568
06/06/07 10:58 AM
06/06/07 10:58 AM
G
gibbonsseabee80  Offline
Member
Joined: Oct 2005
Posts: 40
Chesapeake, VA
I have a fan on a floor stand. It is a plastic one I bought a couple of years ago. It has a three speed switch on the top of it. My wife used her gorilla strength last month and broke the switch. When I installed a new switch, I noticed this little universal motor had a small square capacitor. If your fan eventually gets to full speed, I think there is a bad capacitor in there (if there is one in there).


Brian Gibbons
Re: Strange Behavior by Electric Fan Motor [Re: gibbonsseabee80] #164571
06/06/07 11:54 AM
06/06/07 11:54 AM
M
mikesh  Offline
Member
Joined: Jun 2006
Posts: 613
Victoria, BC, Canada
Try oil on the bushings. These little motors don't develope much torque and the oil can get gummy over the winter. Many household oils are vegetable based and will gum up too so use a petroleum based oil

Re: Strange Behavior by Electric Fan Motor [Re: mikesh] #164574
06/06/07 01:26 PM
06/06/07 01:26 PM
G
geoff in UK  Offline
Member
Joined: Dec 2002
Posts: 193
UK
I've rescued more than one by putting solvent, e.g.switchcleaner or a general purpose machine cleaning solvent, in the bearings. I believe many are sintered bronze and as Mike says old lubricant gums up. Wash it out and re-oil with a good quality thin mineral oil. Works on old record player motors too!

Re: Strange Behavior by Electric Fan Motor [Re: geoff in UK] #164581
06/06/07 04:56 PM
06/06/07 04:56 PM
Retired_Helper  Offline OP
Member
Joined: Mar 2007
Posts: 165
Maine
Thank you, gentlemen! smile


Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
akmaster
akmaster
alaska
Posts: 70
Joined: June 2012
Show All Member Profiles 
Top Posters(30 Days)
Admin 7
Popular Topics(Views)
251,660 Are you busy
188,793 Re: Forum
178,510 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.025s Queries: 15 (0.005s) Memory: 0.9692 MB (Peak: 1.1087 MB) Zlib enabled. Server Time: 2018-11-21 12:00:14 UTC