DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > HVAC > Carrier AC - outside compressor not working

Help Support House Repair Talk by donating using the link above.
Thread Tools Search this Thread
Old 06-27-2013, 12:44 PM  
Junior Member
Join Date: Jun 2013
Posts: 2
Default Carrier AC - outside compressor not working

I have a Carrier AC / Model 38CKC018340. We replaced the capacitor a couple of years ago, and last year had an issue with ants getting into the contactor (think that's what the relay switch is called?). I got in there with an emery board on the contacts and got it working again.

This year, it's been running fine up until this weekend. Same symptoms as before - a single click when the thermostat is engaged. The capacitor doesn't appear to be swollen. I (gently) banged on the contactor and cleaned the contacts again. Started working. Now, a day later, it's doing the same thing. There appeared to be a couple of ant bodies that came out when I banged on it this weekend, but didn't see anything today. And after banging and cleaning it still wouldn't work.

Is this just a bad contactor now? Are they easy enough to replace? Should I take it off of the unit and try and do a thorough cleaning on the contacts? Might there be something else causing this? Like I said, just the single click. Not the buzzing/clicking of a stuck motor. Any help would be appreciated.

Duinan is offline  
Reply With Quote
Old 06-27-2013, 05:21 PM  
Junior Member
WindowsonWashington's Avatar
Join Date: May 2013
Location: Washington, DC, Virginia
Posts: 198
Liked 19 Times on 18 Posts
Likes Given: 28


Capacitors are cheap and while it may not be swollen, I have seen them still fail (usually on hot days) without outwardly showing it.

It is still the next most likely conclusion.

WindowsonWashington is offline  
Reply With Quote
Old 06-28-2013, 01:44 PM  
Senior Member
Join Date: Nov 2007
Location: Grand Blanc, MI
Posts: 2,724
Liked 241 Times on 204 Posts
Likes Given: 113


In this particular case I would replace the contactor. Also, test the capacitor. If you don't have the equipment to test the capacitor, then just replace it. You can expect to pay around $20 per part.
However, if you have a volt/ohm meter and want to check a few other things first, post back and let us know.
kok328 is offline  
oldognewtrick Likes This 
Reply With Quote
Old 06-28-2013, 07:07 PM  
Junior Member
Join Date: Jun 2013
Posts: 2

I have a meter and can test basic things. Does anyone have a recommendation for either an online parts supply house, or even better something that might have a location near Atlanta, GA?

Also, is it worth trying to replace the fan motor as well? It seems to start fine whenever the contactor is working. Not sure how old the actual unit is.
Duinan is offline  
Reply With Quote
Old 07-01-2013, 08:30 AM  
Join Date: Mar 2010
Posts: 40
Liked 4 Times on 4 Posts


Check out Johnstone Supply.
They will sell parts to "Non Certified" A/C service personnel. Some of the other supply houses will not sell to you if you are not licensed. Kind of BS but whatever.
Replace the contactor, when you filed the contacts you most likely removed some of the coating on the contactor. If the fan turns freely I would leave it alone for now. While you are in there, clean the coils with 409 or buy some coil cleaner at the supply house. Spray them good and rinse well after about 15 minutes. Cut the power to the unit before cleaning. Also turn off power to the furnace and outside A/C unit before replacing contactor. the "pick" for the contactor comes from the furnace. You don't want to blow a fuse that feeds the 24V.

Housedoctor57 is offline  
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

Similar Threads
Thread Thread Starter DIY Home Repair Forum Replies Last Post
How can I tell if my condenser/compressor is not working? Lennox 10ACC−036−23 TGrayson HVAC 15 06-12-2013 10:08 AM
carrier ac fan not working. AZheat HVAC 6 06-02-2013 01:58 PM
Carrier AC Outside Fan Will Not Turn ON Galaga1 HVAC 9 05-19-2013 07:43 PM
Carrier A/C Problem dttools HVAC 0 08-02-2010 10:52 PM