Monday, 24 March 2014

6 Effective Ways To Fix A Noisy Aircon

6 Effective Ways To Fix A Noisy Aircon

An air unit is necessary for cooling when it is hot, and warming when it is cold. Today, many people in Singapore are relying on this approach since it is the most effective and practical technique to cool or warm them up. But when an air conditioner becomes noisy, it will just be like any other strident device.

There are many reasons as to why an air conditioner produces noise. At times it can be as a result of loose hardware; or may be bending of a refrigerant tubing; positioning; including other reasons which lead to an unnerving noise of the system.

The following are 6 ways to fix your noisy aircon system: 

I. Inspect the Fan Cables

Things you’ll need:

· non-contact Voltage Tester
· wrench
· screwdriver

Scrutinize the fan blades situated inside the outdoor condenser unit (incase you are using a central air conditioner). Look if you can see any foreign object that slipped in the grille-holes and is hindering the fan from rotating smoothly.

1. Turn the power off then disconnect the switch
2. Unscrew the side-panel to access electrical connections
3. Verify using a “non-contact voltage tester” that power is not present in the wires
4. Unscrew the outdoor unit top-panel (the removal will vary depending on the model)
5. Take out the foreign object causing the noise
6. Confirm by spinning the blade to see that it is running smoothly
7. Reattach the top and the side panels making sure that all screws are there
8. Turn the power on at the disconnect switch; then at the main panel
9. Turn the aircon on and listen to hear if all is well

II. Tighten the Screws

Things you’ll need:

· non-contact Voltage Tester
· hex Wrench
· screwdriver

When you hear a rattling noise coming from the air con - a window air conditioner, the problem is loose screws.

1. Unplug the conditioner from wall outlet
2. If the problem isn’t loose housing, remove either the side or the top panel
3. Confirm using a non-contact voltage tester that no power is in the wires
4. Locate and eliminate the wire connecting vent door to the control panel
5. Rotate the fan until the access hole found between blower vanes is within your reach
6. Using the hex wrench, tighten the set screws
7. On the motor housing, find the oil ports then lubricate each port after you pry the plugs
8. Reconnect the port plugs then reattach the side/ front panel
9. Plug the aircon (window air conditioner) back into the wall
10. Turn it on to confirm if the matter is solved

III. Check the Compressor

If the problem with your air conditioner is the compressor, you may need a technician to fix it. Refrigerant flood back happens when liquid penetrates the compressor’s crankcase.

Another reason which is rare is when oil leaks occurs causing low level of oil in the unit.

Typically this compressor problem is caused by how the air con sits on the ground. Always try to put our unit on a flat surface.

A good remedy for this is a Sound Blanket. A qualified technician (HVAC professional) will do the installation. Most manufacturers use this approach to reduce noise in the air conditioning units. Blankets do not in any way affect the compressor’s life span or operation.

The blanket also works as an insulator and this is helpful to the device since it maintains a constant temperature which gives the bearings longer life including a trouble-free start up.

IV. Clean the Drain Pipe

Many times when the air filter is dirty the conditioner produces noise. This is because the dirty filter may cause restriction in the unit making it to freeze; which can later result to melting water hitting the fan. This is what causes the rattling sound. Make an effort of regularly changing the filter to avoid this problem.

Another common problem is when the drain is clogged-up. The only way to solve this is by unstopping the drain(s) in the aircon to prevent frost accumulation which can even cause a more serious damage.

Things you’ll need:

plastic snake jar bleach funnel water

Drain pipe is supposed to drip water constantly to ensure that noise is limited. If not, the clogging can also damage your wall or floor. To solve this:

1. Turn the air unit’s power off
2. Below the drain-pipe, remove the pan
3. Use plastic snake to take out any congestion in the pipe’s body
4. Remove the tough clogs using a wet or dry vacuum (remove the vacuum’s filter when doing this)
5. Mix ¼ cup bleach to � gallon of water. Place the funnel on the vent-tee then pour the solution to wash any substance left by the pipe-cleaner
6. Replace the pan beneath the pipe
7. Turn on the air conditioner

V. Fix the Condenser Coil Pigtail

A pigtail is the straight piece of metal sticking horizontally from the unit’s condenser to the condenser coils. If you are using a window aircon, the pigtail might be knocking the housing of the fan when the blades are not bent.

Things you’ll need:

· non-contact Voltage Tester
· foam rubber
· screwdriver

What to do:

1. Turn the unit off
2. Test with the voltage tester ensuring that there is no power
3. Using the screwdriver, unscrew the side/top panel (depending on the model)
4. Wiggle the aircon chassis

5. In case the pigtail is knocking the housing, use a tiny piece of the foam rubber and place it between the pigtail and the housing.
6. Reattach the panels using screws
7. Turn on the air system

VI. Limit unnecessary vibration

Vibration can also be the reason why your conditioner is making noise. You need no special tool to detect this unnecessary shuddering – just your hand.

Place your hand against the unit’s surface for example on the window if you are using a window air conditioner, and on the wall for a central aircon. If the noisy aircon is changing its raucous tune, then by placing an insulating material such as wood shims, cellophane tape, etc you will limit the noise from causing much damage to you ears.

You don’t have to be a HVAC expert to be able to diagnose, and later on fix a noisy air unit. It is highly recommended that you know these common causes and solutions to help save your money, and best of all keep your cool within no time.