Indoor blower motor runs for about one minute and then switches on and off

Reply

  #1  
Old 02-17-13, 11:49 AM
P
Member
Thread Starter
Join Date: Feb 2013
Location: USA
Posts: 6
Received 0 Votes on 0 Posts
Indoor blower motor runs for about one minute and then switches on and off

Hi all and thanks. Please forgive me if my search skills didn't find a similar answer. This is regarding the interior unit.

I have a Trane BAY96X141503. The following items have been replaced recently:

AC Motor and appropriate capacitor have been replaced (it was old and weak)
Time delay relay was noisy and replaced
Contactor very old and replaced, but otherwise seemed OK.

The unit runs very smooth, strong and quiet now. But, after about one minute, the motor kicks off and there's a clicking sound coming from the control box? (for lack of a better word) Control box as in there's a box with transformer on top of it, and the fuse is located there. I assume the control board is inside.

It was doing this before the items above were replaced as well.

Here are the results of what happens:
With AC on: one minute, clicking, unit off, clicking, unit on
Fan only: same as AC
Heat: same as AC/fan only, but the contactor arcs and switches on and off as well.

When the unit has power and is off, there is a low, faint hum coming from the unit. I assume it's the transformer. As far as I know, this is normal.

I haven't found what might be causing this and I don't want to just start replacing stuff until I find problem. Any insight would be greatly appreciated!
 

Last edited by parkham; 02-17-13 at 12:07 PM. Reason: grammar/spelling and more information
Sponsored Links
  #2  
Old 02-18-13, 06:57 AM
D
Member
Join Date: Dec 2012
Location: United States
Posts: 249
Received 1 Vote on 1 Post
can you open the control box and take a peek ...
 
  #3  
Old 02-18-13, 07:57 AM
P
Member
Thread Starter
Join Date: Feb 2013
Location: USA
Posts: 6
Received 0 Votes on 0 Posts
That's the last thing I haven't done yet. There's a lot of wires connected to the outside. Hopefully I can get the housing off without messing with the wires or taking the blower motor and its housing out as well. Do you think there my be some blown capacitors on the circuit boad or something? What are you thinking? Thanks!!
 
  #4  
Old 02-18-13, 05:43 PM
P
Member
Thread Starter
Join Date: Feb 2013
Location: USA
Posts: 6
Received 0 Votes on 0 Posts
Well, I should have looked at the beginning first. The Relay had a fried transistor. All fixed now :-) . And it's very quiet running too. The other noisy relay is replaced too. Smooth, quiet and ......heat!
 
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: