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Just replace compressor keep tripping circuit breaker

Fan no coming on and hot air blowing

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Shut the power off to the unit, spin the fan blade to see if it spins freely. If it doesn't spin freely, (there appears to be a little drag when you spin it),the bearings are bad, if it does spin freely, then try moving the motor shaft from side to side if there’s any play in the shaft side to side then the bearings are worn and motor needs replaced. Then, check the capacitor, if it’s bulging even slightly, the capacitor is bad and needs replaced. Most of the time people replace the capacitor if motor seems ok. If capacitor is ok, turn power on to see if the motor is getting the proper voltage, if it is and not trying to run, then the windings are probably open, the motor's bad and needs replaced.
The fan motor could have been your problem all the time, because if the fan doesn't come on or runs slow, it causes high head pressure,
which causes high amps, which could trip your breakers.

Posted on Aug 10, 2009

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LGWHD1500ER 12 amp 15,000 btu Window a/c unit.


the condenser is in the hot sun and the fan that moves the air is not cooling or removing the heat from the condenser fins
This places the head pressure of the compressor too high and so the circuit breaker trips from the excessive current draw to run the compressor under this load
The answer to this problem is to place shade cloth on a frame which covers the air conditioner by placing it in a shady area
another solution is to replace it with a split system where the outside unit can be placed away from the sun

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If it trips the circuit breaker as soon as you turn the FAN on, suspect either a bad fan motor or a failed fan motor start capacitor. If you are able to turn the fan on but the circuit breaker trips as soon as the COMPRESSOR starts, it is possible that the compressor is seized.
If, on the other hand, the unit is tripping a GFCI (Ground Fault Circuit Interrupter) breaker or GFCI utility outlet, it is possible that neutral and hot are reversed at the outlet into which the trailer is plugged (happened to me this year at an RV park).

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The compressor is probably drawing to many amps. Breaker could be weak also.. Need to check the amp draw on the compressor.

If the breaker is hot when it blows, the compressor is probably going bad.

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This compressor is small however like other brands in this size range draw 13 - 15 amps. Thats quite a bit of power. The compressor has a thermal breaker that will begin to trip if compressor is hot. I am assuming that the breaker that is tripping is the one on the compessor. I have seen many hitachi breakers fail. Easy to replace with generic 20 amp, cost about $10. Before you replace anything, check amp draw with meter, if within specs try to determine what is causing heat.
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cycling too many times per hour (check manual for recommended)
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using generator for powering compressor (not recommended)
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Hi,

Here is a tip that I wrote that will help you ti find out why the circuitbreaker is tripping.

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1 Answer

The air conditioner was working today i have a RUUD UAKA018JAZ, the fan is running however it is not blowing cold air out the vents


Hi, your problem is in the unit outside. Check to see if the fan is on, make sure the compressor is running also. If nothing is on, check the breaker to see if it tripped. Also, the box at the unit has 2- fuses inside behind the plastic cover you can't see unless you remove it. If the unit is off and the breaker was ok, remove the cover and replace BOTH fuses. Do all of this and let me know. If the breaker keeps tripping or blowing fuses if the unit was off, you have a componant shorted. It may be off or on and not cooling well due to a loss of freon. If it is on, hold your hand above the fan to feel the air. It should be nice and warm almost hot if its hot outside. Let me know what you find please. We can find the problem.
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1 Answer

Air Conditioner trips the 110v breaker, only when the outside temp is above 90 degrees. Unit has been checked several time and the circuit board has been replaced, but has fixed the problem of tripping the...


'Breakers' - are tripped because they are exceeding their amp limits.

The 'hotter' it gets outside - the 'harder' your AC has to work - and under normal circumstances this is not a problem - but when you have a fan motor or a compressor that is starting to 'break-down' (electrically) - often the AC's amp draw will exceed the limits of the breaker - thus 'tripping' the breaker.

I would suspect either the fan motor or the compressor is causing your breaker problem.

Eventually - the component (either the fan mtr or compressor) that is 'going bad' will go out completely and your breaker will 'trip' and not stay on when you try to reset it.

At this point you will need a Service Tech to determine which one is bad.

There is a possibility that your condenser coil (the one that blows hot air) is 'dirty' which will also cause a problem similar to the one you have - but it is less likely.

Also - if you've had the AC 're-charged' lately - it's possible you are in a 'over-charged' condition - but again, this is not very likely.

hope this helps.

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2 Answers

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Two things; outside does the compressor try to come on? If not you may have a switch\Thermotat problem. Also make sure the breaker to the outside unit hasn't tripped. If it has tripped there may still be a problem after you turn the breaker back on. If it's only the fan that's not coming on outside you will need a new capacitor or fan motor and compressor(if the fan motor is replaced you should have a new capacitor also. If it has been intensely hot your unit might have just gotten overworked. Then resetting the breaker is all that is needed. If you have continuos resettings you MUST call a qualified HVAC Tech.

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1 Answer

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If the fan is running and the compressor is getting hot and tripping off you may have a failed capacitor.

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Replace the run capacitor, too.

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