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How to fix problem of Air conditioner doesn't cool

How to troubleshoot and repair the most common problems with your central air conditioner Although some central air conditioner repairs must be handled by a qualified air-conditioning repairperson, you can handle simple repairs and maintenance yourself. Following, you'll find guidance based on the symptoms.

Air conditioner doesn't cool A central air conditioner that runs but doesn't cool may just need to be cleaned. Plan to do this on a relatively warm day. The following are basic guidelines, but always refer to your owner's manual.
1) Before you begin, turn off the power to the unit. There is normally a shut-off or disconnect panel on the house wall next to the outdoor compressor. Also shut off the air conditioner's 240-volt circuit at the main electrical panel.
2) Rake leaves and debris away from the outdoor condenser. Trim any bushes that might block airflow.
3) Unscrew and remove protective grilles and the top cover or grille from the compressor. If the fan is attached to the grille, be careful not to pull any wires loose.
4) Use a soft brush to clean dirt and debris from the fins, and then vacuum the fins with a brush attachment (taking care not to damage the fins).
5) From inside the unit, use a hose and nozzle with a trigger-grip to spray debris from the fins (protect the wiring and motor with plastic sheeting or a large plastic garbage bag). If your owner's manual calls for lubricating the motor, do that now--but don't overlubricate.
6) Reassemble the unit.
7) To test it, turn the thermostat to "Off," reset the power at the disconnect by the compressor and the main panel, and then set the thermostat to turn the unit on. Important note: To avoid straining an air conditioner's compressor, wait at least five minutes between turning it off at the thermostat and turning it back on. Let it run for a few minutes, and then feel the two pipes that connect to the condenser unit on the air handler (slide any insulation back). One should feel warm, the other cool.

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what is the expected life span of LG air conditioner?


What is the model of your air conditioner. With out that information i cant help you with your ac repair problem. If you need any other help check out AC Repair Boca Raton we got you covered


Life Span of Central AC unit are about 10 to 15 years.

Jun 22, 2016 | LG Heating & Cooling

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Whynter Portable Air Conditioner Model: ARC-14S. Problem: It sounded as if something fell inside the unit while it was operating (cooling) then it started to vibrate horribly. The vibration is only present when the unit is cooling (when the condenser is active?).


Hi,Whynter Portable Air Conditioner has many moving parts, and they all make noise and cause vibrations. Some of these parts are more likely to causing shaking and loud noises, and sometimes this signals a larger problem, something to watch and scrutinize. If serious enough, it calls for a repair.

Loose Parts

Loose parts cause the majority of shaking and vibration noises in your air conditioner. A few of the most common loose parts include the air compressor, the piston rods and even the fan or blower unit itself. These noises are clunking, clanking sounds that occur along with a vibrating action. The only method of repair is a complete compressor replacement, which is a repair only a certified air conditioner technician is qualified to make. The compressor is a fully sealed component, so individual parts in the compressor cannot be repaired.

Fan Blades

Fan blades cause noise, shaking and vibrations even when properly secured. If fan blades contact the exterior structure of the air conditioner due to a bent fan blade or broken and misaligned grate, a constant, repetitive noise and vibration results, which sounds like a ticking or banging from the interior of the air conditioner. Vibration in this case is limited but still present.

Mounting Brackets

When an air conditioner shakes, there is a problem with the mounting brackets. These brackets hold the air conditioner compressor steady as it operates. Normal vibrations and shaking would otherwise occur without these brackets. A loose mounting bracket causes the air conditioner to rock back and forth and creates a clanking sound. As the compressor starts up, this rocking and clanking sound begins, resulting in a very loud and fast vibration and noise. It also occurs when the unit shuts down.

Other Sounds and Vibrations

Sometimes air conditioners squeal, hiss, hum or screech. Each noise is often accompanied by a vibration. Humming sounds along with a vibration may indicate a bad capacitor, the electrical part responsible for starting the machine. Hissing sounds tend to indicate a pressure problem while screeching and squealing sounds are fairly common in window air conditioners and in central air conditioners. This sound is also a result of the compressor motor. It usually starts when the unit turns on and continues through its normal operating cycle. Vibrations always occur in the air conditioner due to moving parts and the compressor motor's operation.


Hope it helped..

Aug 18, 2011 | Whynter Portable Air Conditioner

1 Answer

How much should I expect to pay to replace a leaking coil model number is CD5AXW030017?


Well first off - 99% of coils (evap/condenser) can be 'repaired.'

In which case - you're probably looking at a repair bill of between $100 -$200 depending on factors such as type of unit, i.e. window unit or central unit, easiness of repairing the leak, whether or not your refrigerant can be saved i.e. by pumping the unit down before repairing it - and average AC - labor rates in your area.

If you do require a 'coil change-out' - then the same factors apply - although I'd rather buy a 'new' window unit than pay for a coil to be replaced - because the cost will be close to the cost of a new AC.

If a central unit - you're looking at around $500-$700 to replace one of the coils.

good luck!

Jun 23, 2010 | Heating & Cooling

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