Goodman central AC - PCB error

Reply

  #1  
Old 08-06-19, 06:24 AM
J
Member
Thread Starter
Join Date: Aug 2019
Posts: 5
Received 0 Votes on 0 Posts
Goodman central AC - PCB error

Hi folks...... I have a goodman GMH950704CXAB furnace/air handler that has been broken for over a month now. Had pro HVAC guy in and he replaced the blower. Unit worked for a a few days, then quit again. This time the PC board LED blinks once, then shuts off. He came back and said PC board (PCBBF132) needs to be replaced. So, I replaced the PCB and the AC worked again for 3 days. Then same error code on PCB. One flash, then nothing. Is it possible that the second PCB went bad in 3 days? Or a better guess is, what is killing my PCB? HVAC guy can't come for 6 days so looking to troubleshoot myself.

The PCB manual says a single blink then nothing, means PCB needs to be replaced. Any ideas, thoughts? what should I check next?
 
Sponsored Links
  #2  
Old 08-06-19, 12:34 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 58,651
Received 1,050 Votes on 974 Posts
What is the code you are getting ??
One flash and then nothing on a power up or a continuous 1 flash code ?

No LED on the control board does not automatically mean a defective board.
It could be a problem with the 24v supply to the board.
 
  #3  
Old 08-06-19, 01:01 PM
J
Member
Thread Starter
Join Date: Aug 2019
Posts: 5
Received 0 Votes on 0 Posts
When I call for cooling, I get one red flash then the LED goes dark. However the blower continuously tries to start but fails (all while the LED is dark). So far the blower (including the capacitor) has been replaced as well as the PC board. Each time the unit works for a couple of days, then exhibits this problem.
 
  #4  
Old 08-06-19, 06:30 PM
J
Member
Thread Starter
Join Date: Aug 2019
Posts: 5
Received 0 Votes on 0 Posts
Turns out it's not the blower that is trying to start up. It's actually the furnace. Doesn't make any sense since I'm calling for heat. I just noticed some water leaking from the air handler section into the blower. Maybe the water gets on the board and is causing a short somewhere.
 
  #5  
Old 08-07-19, 03:50 AM
J
Member
Thread Starter
Join Date: Aug 2019
Posts: 5
Received 0 Votes on 0 Posts
Sorry the above should read...........

Doesn't make any sense since I'm NOT calling for heat.
 
  #6  
Old 08-07-19, 09:32 AM
Geochurchi's Avatar
Member
Join Date: Nov 2012
Location: United States
Posts: 4,758
Received 69 Votes on 65 Posts
Hi, water leaking, is there a float switch there that is causing the problem.
Geo
 
  #7  
Old 08-08-19, 06:25 AM
J
Member
Thread Starter
Join Date: Aug 2019
Posts: 5
Received 0 Votes on 0 Posts
Hmmm....good question. This unit is in a basement so there is no secondary drip pan under the unit. I don't expect there would be a float switch in the evaporator drip pan since that will always have water. I have to figure out what is causing the water to leak into the blower/pcb board section (which is below the evaporator pan). Maybe a leak in the pan? Or a clogged drain?
 
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: