Blower not turning on for air conditioner

Reply

  #1  
Old 06-16-19, 05:04 PM
Member
Thread Starter
Join Date: Jun 2019
Posts: 2
Blower not turning on for air conditioner

I installed an icm281 circuit board in the winter and my heater started working great. Summer came and my ac will not work. I replaced the capacitor, hoping it was something simple. It will not turn on, if I manually engage the contactor the fan on the outside unit turns on and the evaporator engages and starts to form ice. The blower never turns on. Could this be due to the control board?
 
Sponsored Links
  #2  
Old 06-16-19, 11:12 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 51,442
Upvotes Received: 214
Welcome to the forums.

The thermostat controls the blower and the condenser. Nothing outside in the condenser controls the blower.

When you replaced the board..... do you have a wire on the HI and LO blower terminals ?
HI is the output for the blower in A/C mode. Typically the wire is black on it.
Lo is the output for the blower in heat mode. Typically the wire is red or blue.

ICM 281 manual (pdf)
 
  #3  
Old 06-16-19, 11:46 PM
Member
Thread Starter
Join Date: Jun 2019
Posts: 2
Fixed

I was able to further diagnose it to an issue from the thermostat. The jumper wire was faulty from rh to rc. Replaced the jumper and it works great now! Thanks for your reply!
 
  #4  
Old 06-17-19, 08:02 AM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 51,442
Upvotes Received: 214
Good job. Thanks for letting us know how you made out.
 
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