AC not coming on .. not getting 24 volts at contactor


Old 05-23-19, 03:40 AM
Thread Starter
Join Date: Jan 2015
Posts: 6
Received 0 Votes on 0 Posts
AC not coming on .. not getting 24 volts at contactor

I have 24 volts coming into the condenser but I cannot get 24 volts at either end of the Contactor.

if I push the contactor, the AC does come on.

what could be impeding me to the contactor?

Sponsored Links
Old 05-23-19, 06:01 AM
Join Date: Oct 2016
Posts: 1,316
Received 33 Votes on 30 Posts
Does your unit have pressure switches?
Don’t press the contactor in manually, it can be dangerous and cause damage.
Look up arc flash.
Old 05-23-19, 09:59 AM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 52,674
Received 340 Votes on 318 Posts
Once you have confirmed you have 24vAC AT the condenser coming from the house you need to trace the wiring thru the unit. There should be a low pressure switch in line. There may be a high pressure switch. There could be a delay timer.

When checking for 24v at the contactor..... check at the coil terminals..... not from the terminals to ground.

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
Ask a Question
Question Title:
Your question will be posted in: