Question about Ruud Central System Air Conditioner

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ALMOST EVERY DAY, MY OUTSIDE UNIT STOPS WORKING.

WHEN THIS HAPPENS I OPEN UP THE UNIT OUTSIDE & THERE IS ONLY ONE TEST LIGHT FLASSING. I HAVE TO SHORT OUT THE TEST PINS & THEN IT WILL WORK FOR JUST A LITTLE WHILE THEN I HAVE TO REPEAT THE ABOVE STEPS.

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  • Todd Born
    Todd Born May 11, 2010

    sound like the defrost board is going bad. Is the coil clear of all ice outside?

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CHECK THE STICKER ON THE UNIT FOR THE CODE DIAGNOSE.

Posted on Dec 02, 2009

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1 Answer

Unit stopped cooling, inside unit runs, outside unit does not


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The inside unit is just a fan
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The bearings are bad in the motor and after the fan runs enough it eventually gets hot, making the bearing screech and the fan locks up. Need to replace motor again. See if it has a warranty. The reason it gets hot is because the fan is what removes the heat from the coil and if the fan isn't running there is nothing to cool it off so to speak.

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My Carrier Central Air unit is not working and shows Code: 24 VAC power


Will the indoor unit run with the Thermostat fan switch set on auto?
I need to confirm that the indoor unit runs first.

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1 Answer

MY AC WORKS FOR FOUR HOURS PER DAY AND BARELY COOLS DOWN THE HOUSE, NOT MUCH AIR COMING UP TO THE UPSTAIRS OF THE HOUSE. AFTER 4 HOURS, THE OUTSIDE UNIT SHUTS UP AND NOT MORE COOL AIR COMES IN. BEFORE THIS...


I am not understanding exactly what is happening with your unit. You say it only runs for 4 hours a day and then say that after 4 hours the outside unit shut off. But you don't describe the condition of the outside unit! Is there ice on your outside unit after it runs for four hours or is it so hot that the housing would fry an egg? Since it works for four hours and then stops working, I would guess that ice forms on the condenser grill which tells the thermostat that your air is much colder than it actually is. Then it takes time for the ice to melt off again. Am I close? If so this condition is usually caused by your unit being low on freon making everything work harder. But it could also mean that you have a leak in the system somewhere. But it shouldn't be much of a leak or it wouldn't run for the 4 hours.
I would recommend you charge it to the correct level and then check for leaks.

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1 Answer

We have a msz-ga80va split cycle, indoor unit runs for about 5 minutes without cooling then cuts out, outside unit doesn't kick in at all


Just had the same thing happen to us with the same model (right on Xmas day).
Checked the circuit breaker is on in the fuse box. Power is on to the external unit. Filters are clean.
Internal unit activates... both indicator lights on. After 5 minutes blowing air it stops and the right indicator light goes out and the left indicator light blinks constantly.
The troubleshooting guide inside the internal unit (under the outer cover you open to clean the filters) suggests that 14 blinks is an abnormality with the external unit and refer to service manual.
Think we'll be calling a technician.

Dec 26, 2010 | Mitsubishi Air Conditioners

1 Answer

Ruud uhqa sill runs when i turn off t stat contactor test good and is not stuckhit breaker and back on and fan stops running goes on when t stat is turned on stays on till i trip breaker again i think it...


Your sentence is hard to understand because there is no punctuation. But, I think you are saying that the Outside unit is still running when the inside unit is off and the Thermostat indicates it should be off. If so, you have a stuck relay outside in the compressor/condenser unit. This is common. The contacts get hot and fuse themselves together. You will have to remove the cover on the unit outside to expose the relay. MAKE SURE THE BREAKER IS OFF. If you house is to code there will be a disconnect box on the wall just above the AC unit outside. PULL THE DISCONNECT> then use a flat head screw driver and slight pry the contacts apart. If they are fused very tight you may need to replace the relay. If they break free put every thing back together and you're done. If you this happens again soon you will need to replace relay.

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1 Answer

Central Air Compressor Runs Constantly


Sounds like the contactor is stuck in the outside unit. Turn off the breaker or safety switch, remove the cover, and tap on the body of the contactor with a hammer handle or similar tool. If a click is heard you may have dislodged it and it may work for either a short time or indefinitely. (yeah ,I know that's kinda vague) Test it. If that doesn't clear it up, disconnect the thermostat wires just to make sure and re-test. If the compressor starts without the thermostat connected, you will need to replace the contactor. If you feel real handy, you could perhaps remove the cover, seperate the contacts with a screwdriver, dress the contacts with an emery board until smooth and shiny, and try again.

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1 Answer

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2 Answers

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Hello, It depends what refrigerant the system is on but if it tripping out on HP it could be overcharged with gas or a problem with the outside condesor fan.

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