Question about Carrier 38CKC042 Air Conditioner

1 Answer

Carrier A/C units

Trying to replace contactor, electrical hook-ups don't match from old part to relacement.....HELP!

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Champion:

    An expert who has answered 200 questions.

  • Expert
  • 230 Answers

Double check that the new contactor has the same electrical ratings on it. My guess is that the coil should be 24v while the relay should be able to carry the same amperage at 220v.

First shut off the breaker and disconnect switch for the furnace and outdoor condenser and call a licensed HVAC contractor:)

If you are determined to do it yourself, Then read the schematics first. Be aware, if you mis wire the system you may cause more damage than you have now. Not to mention your personal safety is at risk.

I am basing this on the most common style contactor found in my area.

The main relay side should be labeled. (eg. L1,L2-T1, T2). These should match exactly like the old one. L1 and L2 are the incoming power. T1 and T2 are the power leaving the contactor. All the 220v wires should correspond to one of these four terminals either by screwing them down or fitting the spade connectors together.

Usually the 24v wires will plug onto the coil (near the bottom, left and/or right sides of the contactor) silver spade connectors.

(STEP 1.) Leave all Wires Connected to your Old Contactor.
(STEP 2.) Remove the two mounting screws that hold the Old Contactor to the Air Conditioners casing.
(STEP 3.) Now Install the New Contactor to the old contactors existing location using the Same two Screws.
(STEP 4.) Now take Off one wire at a time from your old Contactor and Install each wire one at a time to the proper location on the new Contactor.

Posted on Jun 25, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have a carrier package unit 50HJQ005-631 SERIAL 160BG50314, condenser fan motor wont come on, we found motor was gone and we replaced, capacitor too is new, but still dont come on.we test the contactor...


are you getting power to contactor? 240 volts. is the thermostat calling to the contactor you should have 24 volts to the contactor from the thermostat to turn it on the out side unit. check to see if the contactor is suck in this is in the middle of the contactor you can push it in to see if you are getting power if you push it in then youa re not calling from thremostat.

Oct 24, 2013 | Carrier Air Conditioners

1 Answer

The outside fan in my carrier unit will not stop running when temp inside has been reached?


There can be multiple problems with your situation, one being a stuck condenser fan motor contactor/relay, a shorted motor, bad control board, etc. If you could at least check the contactor that controls the CFM and see if it is pulled in that could help narrow down the search for the answer.

Sep 23, 2011 | Carrier 50TJ028 Rooftop Electric Cool Air...

1 Answer

My fan in the outside unit will not shut off and runs all the time, my electric bill was $400 last month! A neighbor claims i need freon another guy (HVAC mechanic) told me it was the compressor and that I...


Hello, it sounds to me like it is the contactor coil on the outside unit, a contactor is like a relay and energizes when power is applied to it, If this contactor is stuck or bad it will cause the fan to run continously. I will post a pic of the contactor coil so you can see what it looks like. Most likely replacing the contactor coil will solve the problem and cost about 15 bucks at a heating and cooling store. robhvac47_15.jpg

Feb 04, 2011 | Ruud Matching Split Air Conditioner

1 Answer

When the thermostat turns off, the condensing unit continues to run. The old contactor was sticking. I could go out and tap on the side of the electrical box beside the compressor, and the contactor...


You most likely have a short. Start by removing the wire on the terminal marked y in the t- stat then see if it shuts down. Look in the air handler for wires touching together. I have also eound wires touching in the wall from the t-stat.

Jun 21, 2010 | Carrier 38CKC042 Air Conditioner

2 Answers

Carrier 38CKC042300. oUTSIDE UNIT FAN WAS TURNING REAL SLOW. ac UNIT IS OFF BUT FAN TO OUTSIDE UNIT IS STILL TURNING. sHOULD NOT BE TURNING AT ALL WITH AC UNIT OFF


The outside fan may run if the unit is in defrost mode this is normal for most heat pumps it is there way of trying to keep the outside unit from staying iced over so the next time the unit runs it will have air flow through the coil and the ice will not be there to prevent air flow.

Jan 12, 2010 | Carrier 38CKC042 Air Conditioner

2 Answers

Wiring instructions for Thermostat Honeywell with Carrier Package


Jumper R to Rc and hook hot wire from transformer to R usually red wire
O = Reversing valve probably white or orange If you get heat when calling for cool or Vice Versa then switch wire from O to the B terminal.
Y = Contactor usually yellow
G = Blower usally green
Jumper Aux to E need to go to unit and use the wire that goes to your Auxiliary or 2nd stage heat
L = Light if you have this terminal on your unit then hook it up.
C = Common from transformer usually black, if you have this terminal on your unit hook this wire up.
Make sure you go to your unit and only hook these wires up if they go to these locations.

Jan 11, 2010 | Air Conditioners

2 Answers

Compressor fan and compressor not running new 2 yr old system puron


No power to outside unit. Check to see if contactor on outside unit is pulled in. Most AC units inside have float switch. When the drain stops up it shuts off outside unit. Located in overflow or underneath unit. No Problem Rusty

Jun 05, 2009 | Carrier 38CKC036 Air Conditioner

1 Answer

My ac fan went out on a carrier ac unit. Need wiring help


use a seperate capicitor for the fan only pick up 1 leg of power from common side of the compressor cap and the other from the contactor or the board in a heat pump situation

May 11, 2009 | Carrier 38CKC036 Air Conditioner

1 Answer

Old carrier a/c unit


sounds like your contactor coil is shorting out.replace the contactor

Sep 20, 2008 | Carrier 38BRC048 Air Conditioner

1 Answer

CHANGING OUT A FAN MOTOR ON A GOODMAN CONDENSOR UNIT. OLD MOTOR HAS, PURPLE,BLACK AND BROWN WIRES. NEW FASCO MOTOR HAS BLACK,WHITE, BROWN AND BROWN-WHITE WIRES. HOW TO I HOOK THEM UP?


The black and white wires get 220 from the contactor. The brown and brown/white go to the capacitor. I do hope you bought a matching capacitor to go with the new motor. They don't cost much and make the hook-up way easier.

Jul 25, 2008 | Goodman Air Conditioners

Not finding what you are looking for?
Carrier 38CKC042 Air Conditioner Logo

286 people viewed this question

Ask a Question

Usually answered in minutes!

Top Carrier Air Conditioners Experts

Cindy Wells

Level 3 Expert

4761 Answers

yadayada
yadayada

Level 3 Expert

61249 Answers

Lawrence Oravetz

Level 3 Expert

7686 Answers

Are you a Carrier Air Conditioner Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...