Carrier 48ss-042 Wiring Question - HVAC - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC


Thread Tools Display Modes
Old 06-14-2009, 11:52 PM   #1
Join Date: Dec 2008
Posts: 10
Rewards Points: 10

carrier 48ss-042 wiring Question


I'm not an hvac but I'm a good diyer. I normally stay away from the hvac stuff but I had to take the chance on this project because It is a packaged unit (no freon to remove\add) and it is replacement to an older model.

I bought the AC unit (carrier 48ss-042100331) from a lady who had an electrician carefully remove the unit. Unfortunately, one red wire was disconnected from the circuit board for one reason or another.

After setting up the new unit by running the ductowrk, I ran test the AC and it was cold and nice. I'm able to perform all functions except getting the AC to shut off automatically when the set temperature has been reached. The thermostat and its wiring are fine, but when I looked the unit and I noticed red led light ON the control board. It is not flushing!!

I'm thinking that the red loose wire my have something to do with this problem. There is an 'L1' available connection I was going to reseat it but not sure if it that's the right place. I checked at the manual but couldn't make sense of the wiring diagram located in this pdf at page 21.

Please let me know if I should connect the red wire to L1 within the circuit board.. I don't want to chance it nor hire a contractor for 200.00 to do a 5 sec work.. Thanks.


Last edited by bekind42; 06-14-2009 at 11:56 PM. Reason: spelling
bekind42 is offline   Reply With Quote
Old 06-15-2009, 05:53 AM   #2
Electrical Contractor
wirenut1110's Avatar
Join Date: Apr 2008
Location: Chester, VA.
Posts: 1,054
Rewards Points: 510
Send a message via AIM to wirenut1110

Just a guess, but it looks to me like you may have a 3-speed indoor fan and, according to the schematic, only the blue wire is hooked up not the red.

If this is the case, it's not your problem. I would just disconnect the red wire going out to the t-stat and if the unit stays running then the problem is internal. If it cuts off, it's external (t-stat)

I wouldn't connect that wire on L1. There's a few reds in the diagram with low and high voltage.

Maybe some experts will have more suggestions/remedies.


wirenut1110 is offline   Reply With Quote
Old 06-15-2009, 12:13 PM   #3
Join Date: Oct 2008
Location: Suburbs of Detroit Mi
Posts: 3,704
Rewards Points: 2,000

Looks like a package unit
hvaclover is offline   Reply With Quote
Old 06-15-2009, 05:54 PM   #4
An old Tradesmen
Join Date: Oct 2008
Location: Somewhere
Posts: 34,413
Rewards Points: 7,816

Trace the wire to what it is hooked to.
And then look at the diagram to see where the unconnected end gets hooked to.
beenthere is offline   Reply With Quote

48ss-042 , carrier , led , light , red

Thread Tools
Display Modes

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Series wiring question. ingeborgdot Home Theater 2 05-29-2009 09:01 PM
Basic wiring question Rbutch Electrical 4 05-27-2009 05:36 AM
Warranty Question for the Pros (Carrier) Home Air Direct HVAC 5 05-22-2009 09:01 PM
Older wiring question... PirateKatz Electrical 8 11-25-2008 10:11 AM
Putting a new Motor in a Carrier Furnace... Wiring issues cbrent HVAC 3 10-08-2007 06:08 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1