New inducer motor will not close pressure switch

Reply

  #1  
Old 02-08-20, 04:55 PM
B
Member
Thread Starter
Join Date: Feb 2020
Posts: 1
Received 0 Votes on 0 Posts
New inducer motor will not close pressure switch

Furnace model: Carrier 58STA110-10112
Inducer motor replacement part: HC21ZS123

The old motor was loud and was failing causing Error 33. It was a Jakel J238-150-1571.

I replaced the motor and everything seems good. The new motor is quiet and spins freely. The new code is Error 31. I've noticed that the cooling fan has arrows that show it should spin counter-clockwise but the motor is spinning clockwise.

Is it possible that the motor is spinning the inducer fan the wrong direction? Or is the new motor not spinning the old fan fast enough to close the pressure switch?
 
Sponsored Links
  #2  
Old 02-08-20, 05:28 PM
Grady's Avatar
Forum Topic Moderator
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 14,241
Received 23 Votes on 21 Posts
Certainly sounds like the motor is turning the wrong way.
 
  #3  
Old 02-08-20, 07:21 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 57,094
Received 840 Votes on 787 Posts
Welcome to the forums.

Seems to be a little confusion here.
A code 33 fault is over heating...... possibly caused by a problem main blower motor.
A code 31 is pressure switch not closing..... possibly caused by a draft inducer problem.
These are two distinct and unrelated problems.

I've never had one spinning in the wrong direction.
Possibly the motors aren't interchangeable.
 
  #4  
Old 02-09-20, 06:02 AM
Grady's Avatar
Forum Topic Moderator
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 14,241
Received 23 Votes on 21 Posts
The one time I had a fan motor suddenly spin backward, the capacitor was at fault. Why it started turning the wrong direction is beyond me. Normally a bad cap will just cause a motor to not start.
 
  #5  
Old 02-09-20, 10:36 AM
B
Member
Join Date: Oct 2015
Location: Ct.,USA
Posts: 1,584
Received 65 Votes on 58 Posts
Is part: HC21ZS123 a Carrier number? If start capacitor didn't come with new motor, reverse leads on capacitor. Motor will rotate in opposite direction. After removing power, short both terminals on capacitor to ground before reversing leads.
 
  #6  
Old 02-09-20, 10:52 AM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 57,094
Received 840 Votes on 787 Posts
Yes..... HC21ZS123 is a Carrier part number for a replacement motor.
There is no start or run cap used with it.

Name:  cm.jpg
Views: 62
Size:  5.9 KB
 
  #7  
Old 02-10-20, 03:44 AM
B
Member
Join Date: Oct 2015
Location: Ct.,USA
Posts: 1,584
Received 65 Votes on 58 Posts
Assuming old motor still operates, apply AC power and determine direction of rotation. If rotation of new motor is different (viewing orientation same as old motor), this is not the correct replacement. Contact Carrier about the issue.
 
PJmax voted this post useful.
  #8  
Old 02-17-20, 01:05 AM
V
Member
Join Date: Feb 2020
Posts: 10
Received 0 Votes on 0 Posts
Probably have a clogged pressure switch tube

Alot of the time the pressure switch tube or the hole it connects to on the fan is clogged. Pull the tube off and blow in it and you can get a paper clip and stick it in the hole the tube connects to on the fan side. If this don't fix then pressure switch could be bad try jumping it out by getting a piece of wire to connect the 2 wires together that go to pressure switch. If you jump it out and it works you need a new one.
 
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: