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18000 but air conditioner compressor will not start just hums on high

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  • Master
  • 40,701 Answers

Like all electric motors , there is a start run capacitor next to the compressor
it checked or replaced

Posted on Apr 10, 2015

  • 1 more comment 
  • Scottie Teague
    Scottie Teague Apr 10, 2015

    It Is an 18000btu window unit. It runs but the condenser doesn't kick. Copassitor looks OK checked the wires. One wire looked loose tried to solder back on the condinsor kicked in then stopped

  • Bill Boyd Apr 11, 2015

    replace the capacitor as they are not repairable

  • Bill Boyd Apr 11, 2015

    the loose wire has probably broken off the plates inside

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6 Suggested Answers

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Posted on Jan 02, 2017

  • 147 Answers

SOURCE: heat controller mini-split air conditioner

Check each screw on your compressor to ground (compressor case). Should be very high resistance Then check the resistance across your teminals on the compressor to be sure it is not shorted. Then check the wiring to your capacitor (The big one). I ran across this just last week. The mechanic didnt have the capicator wired correctly. If it is brand new it will have a wiring schematic somewhere on it.
Dont leave the compressor on very long, but turn it on long enough to get a voltage reading across the terminals. I assume it should be 240 volts. If you have check all of this, they make a jump start gadget to start a stuck compressor. They sell it just about everywhere. Let me know how this comes out..

Posted on Sep 30, 2008

  • 15 Answers

SOURCE: LG AIR CONDITIONER NOISE

What kind of air conditioner is this? A window unit or a split?

Posted on Sep 19, 2008

  • 1033 Answers

SOURCE: need a fan motor for fedders model A6Y18F7B 18000

Easiest thing to do is pull the motor out and take it to Grainger. They can probably match it with a Dayton brand. No HVAC place will sell you a motor. They are all wholesale, and not to the public. You really don't have a whole lot of options here.

Good Luck

Posted on Feb 21, 2009

farfield
  • 462 Answers

SOURCE: CARRIER MODEL 38YCA030370 MAKES HIGH PITCH ELECTRICAL HUMMING NOI

Yes it could be the pop off pressure relief on the compressor.
I assume it is the outdoor fan your referring to not running.

If this is a heat pump and it is in defrost (only in the heating mode should your outdoor fan be off and then for only a max of 12 to 15 minutes).
If it is just AC ir is Heat pump in cool mode, the out door fan should run while the compressor and indoor fan are on. Until the thermostat is satisfied on room temp.

This high pitched squealing is indicative of a bad fan motor or capacitor for the out door fan motor. Kill power and test blades to see if turns free. Check the run capacitor inside control panel. It is usually silver or aluminum colored (some are painted gray). The top should be flat with rolled edges and the sides should either be round or oval shaped with no swelling or oil leaking from inside it. If this all looks normal take it to where your going to get a motor any way and ask them to check it or sell you a replacement at the same time. These can go out usually from high voltage (lighting...) or from over heating (bad fan motor, dirty out door coil...).

Hope this helps you if not post back I'll respond as soon as I can. And please rate me as high as you can. Thank you for using Fix ya and good luck.

Posted on Mar 28, 2009

waelmet
  • 6 Answers

SOURCE: Split Air Conditioner Compressor Start Problem

you need to change it again.

rememper that I am not rich enghe to by the cheep

Posted on May 24, 2009

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