AC Unit Outside Not Working.

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Old 05-11-18, 11:11 AM
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AC Unit Outside Not Working.

So I called a family friend tech, and I explained my issue to , being that I am a woman, I had know clue what he was saying other than it was going to be 700$ bucks if the unit needed free on due to my unit not being made anymore. Also, if the unit needs to be replaced it could be from $4,000-$6,000 dollars.

So so here is my issue: Recently where I live the heat has been kicking up in temp, and the AC unit has not been used that often until this increase of tempatrure outside. My AC unit outside my home is not turning on, not making a humming sound, and the fan is not turning. When I do turn it on from the inside, it blows relatively hot air out. I can not find a reset button, that was instructed to use by DYI YouTube videos, and when I reset the fuse box and waited the 30 minutes, again all found online, the fan would not work, so I took a stick to turn the fan and it began to spin, but the unit was still blowing warm air.

Before I pay thousands of dollars to replace my unit, any hopes of a at home repair to cut cost?

Ac Model # is n2h330gka100
 
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Old 05-11-18, 11:34 AM
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It could be several things. Your friend could be right about it needing refrigerant (freon...generic name), but the big clue is that the fan needs a push to get started. That's usually indicative of a failed capacitor...just about the cheapest fix there is. Often the same capacitor is used to start the compressor and the fan. It's normally a small electronic component about the size of a tomato paste or soup can with multiple wires connected to the top. They can be purchased at HVAC supply stores for less than $50 (often much less) and are relatively easy to change with basic tools and skills. Yours is listed at multiple sites for around $15, expect to pay more at a store.

A visual inspection of the cap can be very useful. If the top or sides are swollen or bulged, or if there are any visible oil stains on it, likely it is bad.

Unless you or a friend have basic tools and feel comfortable taking off covers and disconnecting/reconnecting a few wires, this is best left to a service tech. Their charge might be $150 or so, but they should give the whole system a once over inspection as well.

By the way...it appears you have a heat pump. The same unit provides cooling in the summer and heat in the winter.
 
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Old 05-11-18, 01:23 PM
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Check the capacitor with a meter.
There will be high voltage present in the control panel, and with the unit off the capacitor stores voltage and can still shock you.
 
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Old 05-11-18, 02:06 PM
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Really no need to even check the capacitor. If the unit makes absolutely no sound when it should be running..... it's more than likely a low refrigerant issue and the low pressure switch will keep it from starting.

If he checked the charge and found it low... that's the problem.
 
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Old 05-11-18, 02:43 PM
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Pete...if the fan spins after a push, that must mean the contactor is energized, right? Don't the pressure switches work on the control signal to the contactor? That's also assuming the fan comes up to full speed after a nudge.

And it appears the friend never actually laid hands on it...just talked to her.

Have to see if we ever get a bit more detail.
 
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Old 05-11-18, 02:47 PM
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Ok.... I missed the last line.

You need to wait several hours.....even overnight. Then turn the air on and try to push start the fan. At this point... the compressor should be fairly noticeable. If the fan is not running.... the compressor will shut down on overload and it will be a while before it cools off. Don't leave the system in cool mode if not working properly or the compressor will be permanently damaged.
 
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