Question about Carrier Heating & Cooling

2 Answers

No central air

My thermostat calls for AC the contactor closes but neither the fan nor the compressor comes on.

Posted by on

  • 1 more comment 
  • littlepumba0 May 19, 2009

    the breaker is fine. If i test 230 on both sides could the problem be the capacitor?

  • littlepumba0 May 20, 2009

    turns out I didn't have 230v on both sides of the contactor. I was only getting abt. 100v on both sides. One of the fuses in the breaker box had gone bad. $10 - 2 new fuses - and bingo! problem solved. Thanx!

  • HANK MCNEIL May 11, 2010

    do you have 230 to the contactor? do you have 230 thru the contactor?

×

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 252 Answers

Yes, if you have 230 thru the contactor then the dual capacitor is probably bad.

Posted on May 19, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 744 Answers

Check for power to the outdoor unit. Just because the contactor closes does not mean line power is available. Look for a tripped or turned off circuit breaker, possibly fuses if your residence is much older.

Posted on May 19, 2009

  • jdthefixer May 19, 2009

    Yes - check the cap. Also make sure you have line voltage across the contactor. I have seen instances where the contactor appears to have pulled in, but isn't making on both sides. I woud alos cycle the breaker anyway just to be sure.

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

A/c won't stop running and no cool air


There seems to be a problem with the wiring of the thermostat. Apparently the thermostat is calling for cool (if wired properly), but is not being satisfied. The thermostat is just a switch. When there's a call for cool, the thermostat sends 24-28 volts to the contactor (inside the condensing unit to start the compressor and outdoor fan). The indoor fan is energized through the fan relay (inside the air handler). When the temperature in the conditioned space reaches the set temperature,then the thermostat cuts the power to the contactor and it stops the compressor and outdoor fan. Check that the compressor is actually running, if not, check for 24-28 volts on the wires feeding the contactor, if there is, and the contactor isn't closing then the contactor is defective. If the contactor closes and the compressor doesn't come on, check the capacitor. If the capacitor is good then check your compressor motor. I suspect you have an improperly wired thermostat

Aug 26, 2013 | Honeywell PRO 4000 5-2 Day Programmable...

2 Answers

How to wire contactor on Sears ac condenser style 36LC-000087CR


The contactor for the compressor and outdoor fan is activated by your thermostat when you call for cool. The small coil is an electromagnet that gets 24VAC when you call for cool at the t stat. The red wire in your T stat connects to the blue (or sometimes yellow wire) in the t stat completing the 24VAC circuit and closing the contactor. The line voltage is supplied to the poutdoor fan and compressor upon the contactor closing.

You can manually pushthe contactor close and the outdoor fan and compressor should start. Do this with your hand on the insulated portion of a screwdriver and take the tip of the screwdriver and push the contactor closed. The compressor and outdoor fan should start. That tells you that you have a thermostat to contactor coil issue if the t stat does not close the contactor when you call for cool.

Aug 03, 2011 | Heating & Cooling

1 Answer

All of the sudden tonight it was getting hot went to adjust thermostat and it was blank. No air and no fan. Bought new thermostat (above). checked circuit breakers. thermostat shows it is on but wont kick...


At the thermostat you have several colored wires. Touch the green and red wire together and see if the indoor fan comes on. If you know what wire goes to the coil on your AC contactor touch the red wire to that wire. If it starts the outdoor fan and your compressor the thermostat is not wired correctly. All you are doing by my suggestion is bypassing the thermostat to eliminate it as the possible problem.

The outdoor AC contactor coil wire is usually yellow or blue, but you must make sure not to short the red wire to the other side of your transformer as that will cause you to have to buy a new transformer. Your unit wire diagram should show the wire to the AC contactor coil. You need to determine which wire feeds the AC coil which closes the contactor to the compressor and outdoor fan motor.

If this helps please rate me at fixya.com

Aug 03, 2011 | Heating & Cooling

1 Answer

Coleman central ac is not shutting down. Thermostat clicks off but compressor and fan keep running and cooling


This is either a stuck relay or contactor or the Tstat is bad.. Try shuting down the power to the unit and wait for about 3 munites and trun it back on .. if that does not clear it up My money is on a stuck contactor

Jul 15, 2011 | Heating & Cooling

1 Answer

AC compressor wiil not turn on


You will have to find the contactor which is located in the outside unit. And check the voltage at the contactor, 26 v as this is the thermostat calling for the compressor to come on. You can also push in the contactor and see if the fan and compressor start. There should be an outside fuse box close to your condensing unit. Good luck

Jul 23, 2010 | Samsung AW1203B Air Conditioner

1 Answer

Bryant model 594DNO24-E Air out of vents not cool, fan is not moving on AC unit.


I think you are talking about the outdoor unit so see if you can hear the compressor running. If it isn't running then set the thermostat so that the unit is not running and give the pressure time to come down.(15mins-30mins) Discharge pressure will build up if the fan isn't running and cause the compressor to shut down that's the reason for doing this. After this set the thermostat to call for a/c then see if the compressor is running. If it isn't first check your circuit breaker or disconnect or fuses. One of these should be located close to the outdoor unit. If you have power and it's not running then look at the contactor to see if it is pulled in. The contactor supplies both the fan and compressor. After that then check you capacitor. Some use a double capacitor that works the fan and the compressor. Let me know what you find

Jul 04, 2010 | Bryant Heating & Cooling

1 Answer

Hi i have a rheem central air unit. The outside unit does not want to turn on. i just recharged it with freon about a month ago so it cant be that


Check the circuit breaker(s) for the outdoor unit. Then set the thermostat to make the unit come on and see if the contactor pulls in. If it doesn't turn the fan switch from auto to on and see if the indoor fan comes on. If not your transformer could be shot. If the contactor pulled in on the outside unit check the capacitor for the fan and compressor.

May 21, 2010 | Heating & Cooling

1 Answer

My ac unit does not have power to the thermostat. There is 200 volts going into the transformer and 24 volts going out. There is 24 volts on the back side of a terminal with thermostat wire running to the...


Please exercise due caution in checking voltages in live circuits!

24 volts sourced by the transformer, through the thermostat, then through the contactor (turns on power to compressor/fan) and returns to the transformer, If the thermostat is closed (calling for cool) you will see no voltage across it, but instead the contactor should be energized. Please note, 200 volts seems odd, you should have between 215 and 235. It sounds more like the contactor relay coil may be open. Is the contactor/transformer one piece?

May 15, 2009 | Heating & Cooling

1 Answer

My york central air condenser keeps running. It cools but, it just keeps running.


Some possible problems..turn thermostat where AC compressor should not run. measure lo voltage to the contactor in the compressor housing. If there is voltage there then thermostat is defective. Remove one lead of lo voltage at contactor. Compresor should stop. If not contacts are stuck. Replace or burnish contacts..

Apr 27, 2009 | Samsung AW0503B Air Conditioner

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

110 people viewed this question

Ask a Question

Usually answered in minutes!

Top Carrier Heating & Cooling Experts

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Donni Steen

Level 3 Expert

659 Answers

Bill Long

Level 3 Expert

587 Answers

Are you a Carrier Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...