Blower motor quit working 1 day after new capacitor

Reply

  #1  
Old 08-12-19, 04:22 PM
Member
Thread Starter
Join Date: Aug 2019
Posts: 6
Upvotes: 0
Received 0 Votes on 0 Posts
Blower motor quit working 1 day after new capacitor

Hi all,

I have a pretty old Carrier furnace (1993) that began failing last week. I opened up the furnace, tested all the leads on the board for proper voltage, removed the blower motor housing, cleaned squirell cage, greased the bearings and cleaned off any dust and debris from the motor itself. I then replace the capacitor with a direct replacement. Worked great for about 12 hours. Now it won't come back on.

I ruled out the thermostat and the exterior AC unit, I am assuming that the motor went bad, guessing it was on its way out which caused the cap to die and it just killed off the new one. I am not an HVAC tech (automotive tech), and have alread ordered the motor and another cap, just wondering if this is the right course of action or if there is something else I am not considering.

Thanks!
 
Sponsored Links
  #2  
Old 08-13-19, 04:40 AM
Geochurchi's Avatar
Member
Join Date: Nov 2012
Location: USA
Posts: 3,860
Received 8 Votes on 8 Posts
Hi, in what way did it begin failing? Did the motor have a connector on the end of the cables, check to be sure they are clean and tight.
Geo
 
  #3  
Old 08-13-19, 04:59 AM
Member
Thread Starter
Join Date: Aug 2019
Posts: 6
Upvotes: 0
Received 0 Votes on 0 Posts
Thanks for the reply!

I checked all connectors going to the board as well as the pigtail connected to the motor, door switch and capacitor. When I turn the thermostat to on or auto, the outside ac unit kicks on but the motor has no response. Before I replaced the Capacitor I would hear a clicking noise (similar to an igniter on a grill). But now I get nothing when flipping the breaker and/or sending
The on command from the thermostat.

I cleaned all connectors with a soft bristle brush. I did notice some significant gunk buildup was on the board, but since it worked flawlessly after the initial capacitor replacement and the ac unit responds, I’m hoping it’s not the board
 
  #4  
Old 08-14-19, 09:00 AM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 51,488
Received 216 Votes on 205 Posts
Welcome to the forums.

The only way to know for sure what the issue is is to measure for 120vAC to the motor. You need to determine if the motor is getting power and has failed or that the board is not supplying power.
 
  #5  
Old 08-16-19, 11:29 AM
Member
Thread Starter
Join Date: Aug 2019
Posts: 6
Upvotes: 0
Received 0 Votes on 0 Posts
Which connectors should I test to find that?
 
  #6  
Old 08-16-19, 01:51 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 51,488
Received 216 Votes on 205 Posts
The motor should be 120v. It should have a white wire as neutral and may have several other colors like red, black, blue and orange depending on the amount of speeds.

Typically one or two colors are used. One for cooling and one for heating. The other two are capped off or parked. You'd measure from the used colored wires to the white.
 
  #7  
Old 08-16-19, 03:57 PM
Member
Thread Starter
Join Date: Aug 2019
Posts: 6
Upvotes: 0
Received 0 Votes on 0 Posts
I tested the black and white which came in at 120~ and the red and blue which cane In around 24, so seems like the leads before and after the transformer are good.

I just replace the the motor itself and still no luck.

Closer inspection I see some water damage on the board. I will attach an image shortly.
 
  #8  
Old 08-16-19, 04:10 PM
Member
Thread Starter
Join Date: Aug 2019
Posts: 6
Upvotes: 0
Received 0 Votes on 0 Posts
The Hi Lo leads goign to the motor pigtail have no voltage. I tested the hi and C (assuming common, Beige line) and the lo and C, got nothing.

Red LED on board (ces0110057-02) is off

I fear this is telling me its a board.
 
  #9  
Old 08-16-19, 04:23 PM
Member
Thread Starter
Join Date: Aug 2019
Posts: 6
Upvotes: 0
Received 0 Votes on 0 Posts
ibb .co /MpKNTG3
Image of board (remove the spaces )
 
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