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Outdoor unit will not run

I have a york unit and the unit stopped running one day. i can push the contactor in and the fan turns as long as i hold it in, so i replaced the contactor and still same problem. next i replaced the capacitor and same results.

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  • luvjww Jan 08, 2009

    it is mounted right above the capacitor next to the circuit board on the outside unit

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This sounds like a bad t stat if you are pushing in the contactor for the condenser outside if that is not it let me no where your contacter is

Posted on Jan 08, 2009

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Indoor unit powers up indoor fan runs, has call for cooling outdoor unit will not run, has coms issue


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If it works, the contactor coil is defective.replace contactor

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Tempstar Air Conditioner wont come on


Sounds like you need a new contactor in the condenser. The low voltage is grounded. Remove the low voltage (likely 2 wires) at the condenser and wire nut the wires leading inside. With an insulated screwdriver manually push in the contactor and be sure both compressor and fan run. Then replace fuse and turn power on to air handler with a call for cooling. Obviously the outdoor unit won't run because you unhooked the low voltage but if fuse doesn't trip then it's likely the contactor. Good Luck

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Even I turn of the indoor unit via the controller , the outdoor unit is still running. I turn off the breaker and turn on still the the outdoor unit still running. What do you think the problem is?


Usually when this occurs it is a contactor burnt shut. If left to run, it will freeze the outdoor condensing unit into a block of ice. The contactor activates the compressor and
fan and the contactor is controlled by the low voltage from the thermostat. If the contact points are burnt shut the thermostat becomes of no use in controlling the outdoor condensing unit. The solution is to replace the contactor. Make sure all power to unit from all sources is shut off before attempting to replace. Hope this is helpful.

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Hi, if your indoor unit is running and you have high voltage to the outdoor unit as the compressor runs, I would check the control wires at the indoor unit, coming from the outdoor unit, and from the thermostat terminals to see if the condenser is wired correctly. I'm not sure what relay you are jumping out to get the compressor to run, and no fan, but if you look at the contactor where your high voltage leads connect, you can energize the contactor by pushing down on the plastic part of the contacts and the outdoor unit fan and all will start. Carefully, use a insulated screwdriver, or I have pushed them down with my finger to see, but be careful! You do have high voltage there or the compressor wouldn't have come on. If all runs when you do this, the thermostat control wires to the contactor have no 24 volt control voltage to it. Check your red and yellow wire connections. If you have a meter, check across the 2- for 24 volts. If you have no low voltage, this is your problem. Go to your indoor control section. If this unit has a circuit control board, look for a plug in type fuse like you would find in your car, a 3 to 5 amp fuse. Make sure its not blown. If the led light is on, it will be good. You have lost the low 24 volt power to run the outdoor unit. Check the wiring there, Red and Yellow. Make sure they are terminated. If none of this helps you or your not at ease doing these checks, call out the contractor and tell them that the outdoor unit will not run if it is new and just installed. They should have done a start up on it. Check the contactor first by pushing it down, it will spark but don't jump as it may scare you some. If all runs, check everything I have told you and you should find the problem. If you have any questions, contact me through this site by my user name, shastalaker7. Keep me posted.
Sincerely,
Shastalaker7

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1 Answer

Indoor unit freezing up


THE OUTDOOR UNIT HAS A CONTACTOR WITH THE CONTACTS WELDED TOGETHER THE CONTACTOR CONNECTS TO THE COMPRESSOR AS IT TYPICALLY PULLS A SURGE OF 20 -30 AMPS OR MORE..WITH THE INDOOR UNIT IN FAN ONLY THE COMPRESSOR SHOULD NOT BE RUNNING. THE CONTROL WIRES GOING TO THE UNIT HAVE 24 VOLTS TO THE CONTACTOR TO PULL IN THE CONTACTS TO SUPPLY 220 TO COMPRESSOR.

Mar 09, 2010 | Heating & Cooling

1 Answer

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http://www.youtube.com/watch?v=lywcF7Lt2n0

I hope you found this information helpful.
Good Luck! :-)

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1 Answer

Ruud UAKB-018JAZ outside condensing unit will not run


Trace the wires (small cable) going to the out door unit. This is your 24v control circuit. when it enters the outdoor unit it ties to wires routing through the inside of the unit trace these down. For AC units 1 usually goes directly to the "contactor" (the item you push in and the unit runs?) the other wire can also go to the other side of this same item. But I suspect it goes through other tings before it finally gets there.
Some items are the high and low pressure switches and a delay timer.
A red button sticking out where you can reset it is the high pressure switch and if it clicks and lets it come on you may have a dirty outdoor coil or a fan motor outdoor that is not operating all time.
A low pressure switch has no reset normally on AC or HP.
A delay timer will have 2 3 or 4 wires depending on the type of timer. 1 of these wires goes to the contactor (usually) and one of them feed this wire. remove the wire going to the contactor. now 1 at a time take the other timer wires and touch them to the wire just removed. if the times is bad the contactor will click when you touch one of them with the removed wire.

If its a heat pump you will have to make the contactor try to come on around the board. and this you will need some knowledge on which and what feeds your contactor. Here Id suggest a technician. If I had a way to see your setup and wiring I could talk you through this but its too hard to type and would take way too long.

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Does the indoor blower come on? If not you might have a low voltage problem in your thermostat circuit or blown breaker or fuse for your furnace which energizes the contactor outdoors. If indoor blower runs check if their are any fuses in your outdoor disconnect.

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1 Answer

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Rain should not affect an outdoor unit. It is designed to be outside. The motor that you are hearing... could this just be your compressor running? If the condenser fan is not operational the compressor will run much louder. TURN THE POWER OFF! See if the fan will spin freely if it is pushed. If it doesn't replace the fan motor. If it does you need to check the power at the contactor going to the condenser fan motor. This is 220 volts BE CAREFULL.. If power is going to the motor and the motor is not running... Change the motor and capacitor. If no power is going to it it could be a bad contactor.
Good luck....

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