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A/C Stopped Working

A/C unit not cooling. inside fan goes on, but outside unit does not. flipped all breakers. cleaned thermostat. hit the reset button on thermostat. still nothing. help! White-Rodgers Therm (4 yrs old) Fridgedaire High Efficiency Outside Unit (4 years old)

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Outside fuses are blown on condensor unit at dissconect

Posted on Jul 13, 2009

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Why does air conditioner trip circuit breaker?


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Sound like bad mercury switch or time for a new thermostat would be my first guess, second guess would be that the condensing unit needs to be cleaned out side. it might be frozen up, that happens when it gstarts getting hot outside.
It might also just be as easy as flipping the breaker to the unit to allow it to reset and turning it back on. but if its still cooling and just wont shutt off, my guess would be thermostat or lose wire in there of.

If you dont have a maintenance guy you can call and it is too cool, try turning the breaker off at night until you can get it looked at.

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I have a goodman cpk j42 -1b ac unit on the outside and a central heat and air unit inside. the ac unit come on and runs fine but when it hit the temp the thermastat clicks and the fan outside goes of but...


Hello BWOOD Check the thermostat FAN button is in AUTO position not ON position.That might be it .The relay is in the blower unit but they RARELY become frozen/welded stuck on.

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1 Answer

Inside Electric Furnace/Air Handler Not Working. Please help!


ok this can be simple or tricky is the breaker that trips the same size as the one in the breaker panel 2.look in the unit itsself see if there r breakers inside the unit there usually are and they might have tripped it might be as simple as flipping a breaker but the problem with the breaker tripping is what concerns me now it may just be undersized or getting weak and finally crapped out get ur meter and flip the breaker on and see if u r getting power to the unit if ur not u have gott a breaker that isnt letting power go thru now if u have power u might have a bad blower motor turn the unit on and calling for the fan on if the fan doesnt start try spinning the blower by hand now if it starts then u probably have a bad capacitor they r usually mounted on the side of the blower housing it is oval and its gonna be a 5mfd(microfarad) or 7.5mfd and that couldve been what was kicking the breaker now if the blower is stuck and it wont turn or its very hard to turn then make sure the blower wheel hasnt slipped on the shaft and is rubbing up against the housing if it is just loosen the set screw and set it back even and tighten it back up now if the wheel is free and its still hard to turn then u have a bad blower motor its not a big deal to change out and not real expensive if this dont help hit me back and well walk thru it hope this gets lil momma and the pets warm have a good day

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1 Answer

A/c outside not working


The buzzing noise is your contactor drawing in from your thermostat. The fan part of your unit is on a different circuit from your outside A\C unit. Your thermostat is the conductor of the orchestra tying ths units together. It may well be that your A\C circuit breaker has tripped, if it has there is a reason for it's tripping. Resetting the breaker by turning it off then on may get your unit running, but a technician needs to ascertain why it tripped. Or it could be a bad contact switch inside the outside unit not letting enough electricity through the switch. More than likely the first issue. Good Luck

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2 Answers

AC wont kick on....


The first thing to check is your breaker box. There should be one double breaker for the air handler unit, that's the inside unit, and one double breaker for the compressor, that's the outside unit. Check both breakers. If you're not sure if they've be thrown, click them toward the outside of the breaker box (off position) and then click them toward the inside of the breaker box (on position). If the breakers are on and you still are not getting any A/C take a look at your compressor, (outside unit). If the fan is running at least you're getting power. However, your compressor down inside the unit may not be getting power or it may need to be replaced. The compressor has a start-up cap. If this cap goes bad or the wires from this cap fry or corrode away, this will also keep the compressor from starting but the fan will still run. If the fan is not running it could be caused by a faulty relay inside the compressor cabinet. This relay is supposed to open and close based on a low voltage signal from the thermostat. I believe it's roughly 24 volts. This relay switches on and off the 240 volts for the compressor and the compressor fan. Often this relay goes bad or the wires leading up to it fry. If you?re going to work on the unit yourself make sure all power is shut off. There should be a shutoff switch on the outside wall near the compressor. I?d also shut the breakers off.

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The fan on the outside unit is powered from it's 240 volt source. Check that the breaker for the outside unit is not tripped. Also, a contactor is inside the outer unit that starts the fan - it may be faulty.

Jul 26, 2008 | Friedrich QuietMaster Electronic SS12J30D...

2 Answers

Carrier air conditioner


Sounds like you either blew a transformer, have a bad circuit breaker or blew the main fuse in the outside disconnect. If the indoor unit is still blowing air (no matter what temperature) start looking at the power supply to the outdoor unit. From the circuit breaker, the power will go to a small box located within a few feet from the outside unit. This box will have either a lever on the side or you will be able to open the box and pull out the fuses. From this box the power goes to the condensor. The first thing you should do is to turn off the breaker to the outside unit. Flip it back on and if you have a call for cooling, after about 3 minutes the outdoor unit should start. If it does not, shut off power again to the unit by switching off the breaker, go outside and pull out the fuses in the disconnect box. Using a multi meter, check for continuity thru the fuses. If you have continuity, call your technician. If one or both fuses show no sign of continuity, replace the fuse(s). Make sure that the thermostat is working and sending a signal to the indoor air handler. You may be able to check this by turning the fan switch to "Fan" and see if the blower turns on. You may just have a bad thermostst. Caution should be used anytime you are near electrical components. If you do not have the skill-set required to test electrical equipment, leave it to a proffessional.

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1 Answer

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