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Condenser unit not turning on

Condenser on unit not turning on

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Could be a bad trans former, cut wire, bad contactor or a swollen and leaky capacitor.
OUTSIDE CONDENSER BLUES

Posted on Jul 29, 2009

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Why does the aircon cant stay on


Most modern air conditioners are designed to offer up to 10 to 20 years of reliable use. However, even the most reliable of air conditioners may stop cooling or suffer from problems from time to time. Remember that one of the best ways to prevent unexpected A/C problems is to have regular maintenance performed on your unit. If you cannot perform the maintenance yourself, hire a professional to do so. Spending money on maintenance now can save you from big repair bills in the future.
Some of the most common AC problems are listed below, and they may even be the reason why your air conditioning unit won't kick on. Review this information so that you know how to best troubleshoot problems with your unit. Be sure to determine whether your unit has shut down entirely or whether only a part of your unit has shut down or isn't working. Remember that it is always necessary to cut power off to your unit before inspecting it for wiring-related problems.
  • The AC unit does not cool rooms evenly: Inspect your unit's distribution channels. Make sure that the fan on your unit is kicking air into rooms or into your duct system.
  • The AC unit turns on but doesn't cool: If your unit turns on but doesn't cool, check your thermostat to be sure that it is set at the correct temperature. You should then check the condenser and evaporator for dirt and clogging. If too much dirt builds up, your unit may not turn on at all.
  • The condenser unit returns on and off repeatedly: Having a unit turn on and off repeatedly is extremely frustrating. In general, this problem is caused either by a dirty condenser and fan or a clogged condenser.
  • The condenser unit won't turn on: If your condenser unit won't turn on at all, you may have a faulty motor or the unit may not be receiving power. Examine all wiring and ensure that the unit is plugged in.

Sep 23, 2015 | Cars & Trucks

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Replacing a condenser fan in centralized A/C


On of the common problem with centralized A/C unit is a bad condenser fan. I have known people who called an ac technician to fix their ac because of a bad condenser fan and suggested replacing the whole unit! Costing them a lot of money when all it needed was a 50 dollars condenser fan! If the condenser fan do not run or it runs only when you give it a push, it'sbad. You will also notice that it is vey hot. When replacing a condenser fan you may want to replace the starting capacitor too. Replacing a condenser fan is not very hard, just make sure that the power to the ac unit is turned off at the breaker box. Confirm that the wires are not live by using a meter or an ac tester. The fan motor are held with brakets sometimes just screws. Most fan you can buy that has reversible rotation by just reversing the plug. Make sure it is blowing upwards. If not reverse the rotation. So if you notice that the unit is not putting out cold enough air and you went outside and noticed the compressor running but not the fan, turn off the AC right away and do not use it untill the fan is replaced. Running the unit with a defective fan can damage the compressor caused by overheating.

on Jul 10, 2010 | Heating & Cooling

1 Answer

Condensation belching out on to floor


Hi, I suggest that you check that all the lint has been removed from the dryer, especially the condenser cabinet area.
Check that the rubber seals around the condenser unit have not been damaged, or dislodged - especially on the inner part of the small door.
Also check that the plates in the condenser unit have not been damaged as this could also be the cause of the leak.
If the two red stops cannot be turned to hold the condenser unit in place, the condenser unit is not installed properly, so carefully remove it, check there are no obstructions where the unit goes, and try to slide it back into place so the red stops can secure the unit in place.
If you have no success after doing this, you may have to get the unit serviced.

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1 Answer

I have an AMCOR ALTL1200E, fan works, cold air comes out when the compressor turns on BUT after 5 minutes compresor turns OFF, then after 5 minutes again it turns on, what is wrong, thanks


Sounds like the unit is cycling off on a high head pressure (condenser coil too hot). When the condenser cools, the automatic switch resets. The unit cuts off again when the condenser heats up again. Clean the condenser coil, and clear out any debris (bird's nest, lint etc.)

Aug 30, 2013 | Amcor ALTL-12000E Portable Air Conditioner

1 Answer

The furnace is running but there is no cool air. I change my filters every month and I flushed out the water lines last month.


flushing out water lines do you mean condensate line coming off the furnace that drain to the outside. is the condensing unit outside running when u have it in cooling mode. by condensing unit I mean the unit outside that has lines that run to the inside. does that turn on when u have it in cooling. the unit outside have two components that should turn on the outdoor condenser fan and a compressor.

Aug 21, 2011 | Ruud UAKA060 Air Conditioner

1 Answer

Hi, I have a goldStar GA 1866VHR split Airconditioner, (5050w cooling and 5040w heating capacity). Today I noticed that compressor/condenser unit was still running after I turned off the aircond: from the...


Thanks for your detailed information. But solution is very simple. The compressor contactor in out door unit. Struck. And hence, when you power on, without indoor commanding, the out door starts running.

Replace same type Contactor relay (In out door unit) immediately. Hope, it's helpful.

Jan 19, 2011 | Heating & Cooling

1 Answer

Everytime my central air unit kicks on my circuit breaker trips. It didn't do this last year or even earlier this year


A circuit breaker 'tripping' everytime the AC unit kicks on 'most always' indicates a direct short (somewhere in the condensing unit), although it is possible that the breaker itself is bad - (but not likely).

Usually the cause of this 'short' will be - either the condenser motor in the condensing unit (outside unit) or the compressor - also in the condensing unit.

If you're mechanically inclined - and "very careful" around electricity - there is a fairly simple way to find out which component is causing the short.

Step 1 - Make sure the condensing unit (outside unit) is completely disconnected (electrically) , i.e. pull the fuses/turn off circuit breaker on outside unit and turn off thermostat.

Step 2 - disconnect the condenser motor (this is the outside fan motor). Note: when you disconnect the wires of the condenser motor "be sure" you mark/write their location, and wrap them in electric tape.

Step 3 - start the AC unit. If the breaker trips again you can pretty much rest assured it's the compressor that is shorted.

To prove it (without a doubt) - go to next step.

Step 4 - "be sure circuit breaker and thermostat is turned off" - and - 'reconnect' the condenser motor - and - then disconnect the compressor wires (mark wires and tape them).

Step 5 - Start AC.

If breaker doesn't trip - you know it's the compressor that is shorted.

If breaker 'does' trip again - then it's possible the breaker itself is bad (not likely) or there is a 'short' in the condensing unit's "wiring" somewhere (not likely).

My guess is that either the condenser motor or compressor is shorted.

Hope this helps.

Good Luck!

Jun 10, 2010 | Heating & Cooling

1 Answer

AC condenser will not turn off after unit is turned off.


your contactor that supplies power to the compressor has its contacts welded together and even if you turn up the thermostat and the coil that holds the contacts closed will de-energize,but with the contacts welded together this is no longer possible,you need to replace the contactor

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Thanks,
Rob

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