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My Carrier home unit not starting.Only way to start the unit:when briding T1 and T2 on relay ICM with 3 terminals, T2 T1 T3 24 V Input

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You have a faulty time delay. if you can buy a new one i can assist with the wiring email at hvac.tech7872pr@gmail.com

Posted on Apr 23, 2008

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I bought a new universal ac contactor relay to replaced the o.e.m. the new has l1 l2 t1 t2 . the old relay don't say l1 l2 t1 t2 or any indicatio.


The contactor should look alike. Just make sure the same wires are on the same side as the old contactor. Don't worry so much of the l1/t1 and l2/t2

Apr 05, 2011 | Air Conditioners

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Wiring up a compressor + start kit



Wiring up a compressor
If there is an identifying mark on one side of the capacitor such as a Dash, Red paint or arrow pointing one direction that will be the run side of the capacitor, if no marks you can use either side for start or run.
If you have three terminals on the capacitor you have a dual capacitor, (C = RUN compressor and fan) (HERM = compressor start) and (FAN is fan start wire).
The Start wire goes to one side of the run capacitor it will be the only wire on that side of the capacitor.
The Run wire goes to the terminal side (T2) of the contactor, it will have another
wire from that terminal to the run capacitor which is the opposite side of the start wire.
The Common wire will go to the other side of the contactor (T1).
Start Kit
Start from the capacitor to terminal #1 on start relay There should be another wire from
here to start on the compressor.
Common from contactor (T1) to terminal #5 on start relay. There should be a wire from this terminal to the Common terminal on the compressor.(there will not be a capacitor in this circuit)
Run from the other side of the contactor (T2) to the start capacitor and from the other
Side of the start capacitor to terminal #2 on the start relay. There should also be a wire from this
Terminal to Run on the compressor.

on Jan 24, 2010 | Air Conditioners

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I have a single phase copland compressor NEW ( AG133ET-001)that i just replaced. i wired common leg from contactorsT3 to compressors T3(common winding,From contactors T1 to compressors T2(Run winding?)...


you will have to look at the schematic for this theirs different units that wire different way but that sounds correct the way you have it you can double check reverse the start and run always write this down when doing these the supply house can help you to be sure just ask them say hay the diagram has worn away what is t1,t2,and t3 double check your cap it could call for a different size all compressors that ive seen does take a start capacitor some even require start assist kits unless they are three phase what is this compressor going on email me I will help you more and even call my supply house if need be pendletonheatandair@hotmail.com

Sep 14, 2010 | Air Conditioners

1 Answer

My outside unit wont start. the inside fan is running but just blowing normal air, not cold?


check you contact on your outside unit, the relay may have gone bad. In the corner remove four screws, and the cover should come off it may have a fifth in the middle. It is a black square, T1 T2 T3 and L1 L2 L3 , it has a relay in between. Make sure you have you voltage coming in(line the L's), if you don't then somewhere around the unit is a box check and make sure the fuse/breaker is good. If you have power, with an insulated screwdriver or you finger push the contact in, the compressor and fan should run. Now if the relay is engage then it is more then likely the fan motor or capacitor. Hoped this helped tim

Sep 03, 2010 | Goodman CKL42AR42 Air Conditioner

1 Answer

Where do the wires from the compressure go to on main base


Wiring up a compressor
The Start wire goes to one side of the run capacitor it will be the only wire on that side of the capacitor.
The Run wire goes to the terminal side (T1 or T2) of the contactor, it will have another
wire from that terminal to the run capacitor which is the opposite side of the start wire.
The Common wire will go to the other side of the contactor (T1 or T2).
Start Kit
Start from the capacitor to terminal #1 on start relay There should be another wire from
here to start on the compressor.
Common from contactor ( T1 or T2) to terminal #5 on start relay. There should be a wire from this terminal to the Common terminal on the compressor.(there will not be a capacitor in this circuit)
Run from the other side of the contactor ( T1 or T2) to the start capacitor and from the other
Side of the start capacitor to terminal #2 on the start relay. There should also be a wire from this
Terminal to Run on the compressor.

Jan 14, 2010 | Air Conditioners

1 Answer

Compressor won't switch on, have tried reset switch and circuit breaker, but though the wall unit comes on the compressor wont..anything I can do? This has three phase power Mitsubishi..Mr Slim


If you have any experience in working with electrical systems, you can, but if not you should call a service technician.
First being very careful, check to make sure contactor is engaging.
Then check to see if you have the same voltage across all three wires on the compressor side of the contactor, assuming this is 230 volts, check T1 to T2 should have 230 volts, then check T2 to T3 should have 230 volts then check T1 to T3 should have 230 volts. If you have 230 volts to all 3 wires then the compressor is bad probably an open winding and needs replaced. Before replacing the compressor you need to check the resistance (with an ohmmeter) between all 3 terminals at the compressor. In order to do this you need to disconnect all power to the unit and ohm the compressor terminals from T1 to T2, T2 to T3 and T1 to T3 they should all have the same resistance if they do then the windings are good and the compressor is locked up, if one of the the windings is different then the windings are bad, either way the compressor needs replaced.

Nov 08, 2009 | Mitsubishi Mr. Slim MXZ30TN Air...

1 Answer

A/c compressor runs, no fan


did you ohm the relays to verify a correct path? It sounds like the relay contacts are not "making" and providing a pth for flow.

Jul 12, 2009 | Air Conditioners

1 Answer

I NEED TO RECONECT WIRES TO CONTACTER RELAY ON


Power leads L1 and L2 to top terminals of contactor.
Compressor leads T1 and T2 to bottom terminals of contactor
Side terminals get the low voltage leads from transformer.

May 18, 2009 | Continental Air Conditioners

1 Answer

Carrier A/C units


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.

Jun 24, 2008 | Carrier 38CKC042 Air Conditioner

1 Answer

Coleman evcon moblehome ac question


I would replace them to the exact terminals that they used to be on. Technically speaking L1 and L2 stand for Line one and Line two. This would be the incoming power from the breaker or disconnect switch. T1 and T2 are the power leaving the contactor relay.

Jun 17, 2008 | Air Conditioners

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