Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 09-05-2012, 09:06 PM   #16
I'm Your Huckleberry
 
Join Date: Mar 2011
Posts: 5,755
Share |
Default

A/C Fan motor question


Inside blower motor or outside condenser fan motor? Look for two sets of leads which may be wired to each other at the motor. If you have them than those leads can be switched to reverse polarity, change motor direction.

__________________
Thanks.
Doc Holliday is offline   Reply With Quote
Old 09-06-2012, 06:59 AM   #17
Member
 
Join Date: Mar 2010
Location: PENNSYLVANIA
Posts: 2,236
Default

A/C Fan motor question


Go back to your original post #1 and your question & answer you state when you spin the blade it runs. well did it run in the right direction back then before you changed the cap?????? Sounds like something is missing in your replies.
__________________
No Warranty Means- If it breaks in half you get to keep both halves.
COLDIRON is online now   Reply With Quote
Old 09-06-2012, 09:13 AM   #18
Newbie
 
Join Date: Aug 2012
Posts: 12
Default

A/C Fan motor question


Quote:
Originally Posted by COLDIRON View Post
Go back to your original post #1 and your question & answer you state when you spin the blade it runs. well did it run in the right direction back then before you changed the cap?????? Sounds like something is missing in your replies.
Your are right, back then it was still running in reverse.
Would a bad motor cause it to run in reverse? I thought if a motor is bad, it would not run at all.
sean.of.to is offline   Reply With Quote
Old 09-06-2012, 11:44 AM   #19
Newbie
 
Join Date: Aug 2012
Posts: 12
Default

A/C Fan motor question




My motor seems to be unidirectional. It does not have a wiring diagram.

Does it mean I cannot chnage the direction on this?
Could someone please give me some pointers on how to check the wiring?

Last edited by sean.of.to; 09-06-2012 at 12:03 PM. Reason: inserting pic
sean.of.to is offline   Reply With Quote
Old 09-06-2012, 01:08 PM   #20
Member
 
Join Date: Mar 2010
Location: PENNSYLVANIA
Posts: 2,236
Default

A/C Fan motor question


Replace motor and capacitor don't worry about messing with the wires.
__________________
No Warranty Means- If it breaks in half you get to keep both halves.
COLDIRON is online now   Reply With Quote
Old 09-06-2012, 01:41 PM   #21
Newbie
 
Join Date: Aug 2012
Posts: 12
Default

A/C Fan motor question


Quote:
Originally Posted by COLDIRON View Post
Replace motor and capacitor don't worry about messing with the wires.
Is there a way to test the motor?
sean.of.to is offline   Reply With Quote
Old 09-06-2012, 01:51 PM   #22
I'm Your Huckleberry
 
Join Date: Mar 2011
Posts: 5,755
Default

A/C Fan motor question


You can give the motor 120 volts straight form the incoming furnace power. You'd have to unwire the 120 volts to the furnace and wire it directly to the motor, hot and neutral.

Turn the breaker off first.
__________________
Thanks.
Doc Holliday is offline   Reply With Quote
Old 09-06-2012, 01:52 PM   #23
I'm Your Huckleberry
 
Join Date: Mar 2011
Posts: 5,755
Default

A/C Fan motor question


my fault, condenser fan motor.

240 volts so each leg is 120 to the motor, no neutral.
__________________
Thanks.
Doc Holliday is offline   Reply With Quote
The Following User Says Thank You to Doc Holliday For This Useful Post:
sean.of.to (09-08-2012)
Old 09-06-2012, 04:53 PM   #24
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 25,033
Default

A/C Fan motor question


Quote:
Originally Posted by sean.of.to View Post
I replaced my run cap and now the fan starts however itís running in reverse.
I think it has always ran in reverse...I am not 100% sure.
I have double checked and triple checked my wiring, it is exactly like the way I took it off.
Could the motor be bad?
The 2 wires from the fan motor that connect to the cap, just need to be reversed.
beenthere is online now   Reply With Quote
Old 09-06-2012, 07:13 PM   #25
Member
 
Missouri Bound's Avatar
 
Join Date: Apr 2011
Location: Almost Arkansas
Posts: 2,764
Default

A/C Fan motor question


Quote:
Originally Posted by beenthere View Post
The 2 wires from the fan motor that connect to the cap, just need to be reversed.

WHAT!!??
__________________
Do you want it your way or the right way?
Missouri Bound is offline   Reply With Quote
Old 09-06-2012, 07:17 PM   #26
I'm Your Huckleberry
 
Join Date: Mar 2011
Posts: 5,755
Default

A/C Fan motor question


Quote:
Originally Posted by Missouri Bound View Post
WHAT!!??
I didn't want to publicly state that as I'm unclear the facts but yes, it works but only in certain situations, under certain electrical circumstances.. I've actually done that on a furr down that was running backwards when I got there, just to try and it worked. BT will explain.
__________________
Thanks.
Doc Holliday is offline   Reply With Quote
The Following User Says Thank You to Doc Holliday For This Useful Post:
sean.of.to (09-08-2012)
Old 09-06-2012, 07:19 PM   #27
Newbie
 
Join Date: Aug 2012
Posts: 12
Default

A/C Fan motor question


Quote:
Originally Posted by Missouri Bound View Post
WHAT!!??
Why are you shocked? Did you do this and it did not work?
sean.of.to is offline   Reply With Quote
Old 09-06-2012, 07:53 PM   #28
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 25,033
Default

A/C Fan motor question


Quote:
Originally Posted by Missouri Bound View Post
WHAT!!??
LOL. Rotation is determined by the start windings(which are also the aux winding) on a PSC motor. On a 3 wire motor changing which wire is where, changes the sine that the start windings have. And will reverse the rotation of the motor.

On a 4 wire motor, changing the wire positions on the cap will have no effect.
beenthere is online now   Reply With Quote
The Following User Says Thank You to beenthere For This Useful Post:
sean.of.to (09-08-2012)
Old 09-06-2012, 07:53 PM   #29
Member
 
Missouri Bound's Avatar
 
Join Date: Apr 2011
Location: Almost Arkansas
Posts: 2,764
Default

A/C Fan motor question


Reversing the leads on a capacitor of a fixed rotation motor will not change the direction.
__________________
Do you want it your way or the right way?
Missouri Bound is offline   Reply With Quote
The Following User Says Thank You to Missouri Bound For This Useful Post:
sean.of.to (09-08-2012)
Old 09-06-2012, 07:59 PM   #30
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 25,033
Default

A/C Fan motor question


Quote:
Originally Posted by Missouri Bound View Post
Reversing the leads on a capacitor of a fixed rotation motor will not change the direction.
I change PSC motor rotation by capacitor lead change almost every month.

Download Fasco's Motor Facts for a good read on it.

beenthere is online now   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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





Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.