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Aircon Repair

aircon service technician checking condenser.

Aircon Repair

The following table provides a list of common air con problems, the possible causes of the problem and some tips and solutions to resolve the problem. The table is meant to provide you with a general guidance to help you understand your air con problems better so that you know what kind of aircon repair is required to fix the problem.

For minor aircon repair problems, you may be able to resolve them by yourself by referring to the tips and solutions provided in the table. For example, you can easily resolve problems cause by dirty air filter and condensing coil by cleaning them yourself. You can also reset your remote controls and power point yourself to solve some problems if they are the source of the problems.

However, there are many aircon repair which are difficult and dangerous for you to fix them by yourself. As a result, it is better to engage an aircon specialist to help you to troubleshoot for the actual causes and provide the relevant aircon repair solutions accordingly. There are also instances where the aircon repair or replacement cost is not worth paying as it may be the right time for you to replace your old air conditioners with new ones.  When you outsource the aircon repair job, the table will provide you with some ideas on what are the aircon repairs your vendor will be working on to resolve your air conditioning problems.

It is difficult for a vendor to provide a fix price for each type of aircon repair service due to many differing factors including but not limited to the following:

  • Brands and types of air conditioning systems
  • Extent of repair or replacement required
  • Amount of raw materials and time required for the repair
  • Different types of premises (causing different level of difficulty)
  • Location and accessibility of equipments requiring repair

Please contact CitiCool if you have any queries relating to the table below or if you require CitiCool to help you fix any of your air con problems. We have a pool of veteran air con specialist. We can definitely help you to resolve any kind of air con problems in a timely manner. Our mission is to help you resolve your air conditioning problem quickly so that you can continue to enjoy clean and cool air.

Aircon problems, causes, tips and solutions

Before engaging a vendor for your aircon repair, it will be helpful for you to refer to this table first.

Aircon Problems Some Common Causes
Some Tips and Solutions
Aircon Leaking Water  Drainage pipe dirty or clogged
  • General Cleaning or Chemical Wash
Improper gradient of drainage pipe
  • Adjust the gradient of drainage pipe
Aircon not cold
Or Not cold enough
Or takes long time to cool down
Aircon (e.g. fancoil or condenser) is dirty
Remote control set wrongly
  • Check and re-set the remote control setting
Aircon refrigerant is insufficient
  • Top up refrigerant
  • Check the system leakage and repair
Aircon is undersized (Capacity)
  • Replace to bigger capacity aircon
Fan coil unit is in wrong position
  • Relocate fan coil unit
Aircon noisy Blower or Evaporation coil dirty
  • Clean the blower or evaporator coil
Loose or defective components in the air conditioning unit
  • Adjust or replace the faulty parts
Aircon produce foul smell Bad odours or air pollutants were sucked in and release by your aircon
  • Chemical treatment for the aircon.
Aircon not releasing cool air (i.e air release from aircon is at room temperature only) Dirty air filter
  • Clean and wash dirty air filter.
Outdoor condensing unit or compressor is faulty
  • Check if condenser and compressor is working. Repair or replace faulty condenser.
Faulty capacitor
  • Replace capacitor
Remote control set wrongly to “ FAN” mode instead of cool mode
  • Reset remote control to “COOL” mode.
Low refrigerant due to leakages
  • Repair leakages and top up refrigerant.
Faulty condenser fan motor
  • Replace faulty parts.
Indoor or outdoor unit printed circuit board (PCB) is faulty or other components in air conditioning system faulty
  • Repair or replace faulty PCB or components.
Aircon sometimes cold but sometimes not cold Dirty or clogged compressor causing poor heat transfer. This will trigger the safety device to turn off the compressor and on it again automatically when the compressor has cooled down.
  • Clean the compressor.
Under or over charged of refrigerant
  • Adjust the refrigerant to the correct level.
Faulty condenser fan motor
  • Replace faulty parts.
Faulty fan coil or condenser Printed Circuit Board (PCB)
  • Replace PCB.
Ice formed on evaporator coil Most common cause is due to dirty filter
  • Clean and wash filter.
Clogged or dirty evaporator coil restricting air flow to the coil.
  • Chemical cleaning to remove dirt and clogs.
Dirty blower causing poor air flow.
  • Cleaning blower. (Either general servicing or chemical cleaning)
Solenoid valve faulty
  • Replace solenoid
Faulty fan motor
  • Replace fan motor
Low refrigerant level
  • Use pressure gauge to check if the refrigerant charge is low. Check for leakages and repair or replace leaking components. Top up the refrigerant.
Ice forms on the condenser pipe Low gas
  • Top up refrigerant
  • Check the system leakage and repair
Dirty fancoil
  • Chemical cleaning
Indoor blower not rotating but condenser is running
  • Replace defective parts
Remote control not working Remote control is not working or battery is weak
  • Change the remote control battery and test whether it is working
Electronic circuit board or remote control is defective
  • Try the remote control on different fancoil to test whether it is working.
  • Point the remote control LED lamp at the handphone camera and press any button of the remote control. If you see a PINK light shown on the handphone screen. The remote control is still working.
  • If not, repair or replace the board or remote control.
Aircon on and off automatically Power switch (for manually switching on and off the aircon) is faulty
  • Repair or replace the power switch
Indoor fan coil printed circuit board (PCB) is faulty or other components in air conditioning system faulty
  • Repair or replace faulty components
Wrong setting on remote control
  • Reset remote control
Defects in the electronic circuit board that operates the fancoil
  • Repair or replace the Electronic circuit board
Condensation in aircon trunking Mostly likely due to poor quality insulator used or insulator is not thick enough
  • Replace with high quality insulators to reduce risks of condensation in the aircon trunking.
Most common cause is due to dirty filter
  • Clean and wash filter.
Clogged or dirty evaporator coil restricting air flow to the coil.
  • Chemical cleaning to remove dirt and clogs.
Dirty blower causing poor air flow.
  • Cleaning blower. (Either general servicing or chemical cleaning)
Solenoid valve faulty
  • Replace solenoid
Faulty fan coil motor
  • Replace fan motor
Low refrigerant level
  • Use pressure gauge to check if the refrigerant charge is low. Check for leakages and repair or replace leaking components. Top up the refrigerant.
Aircon Light is blinking
(note when this problem occurs, your aircon often shuts off too)
There are many reasons that could cause aircon light blinking. The light blink to alert you that your aircon has some problems. Some remote control has error message to inform you where the problem lies.
  • Switch off the circuit breaker of your AC unit, wait for a few seconds, and then switch it on again. If this does not work, check the wiring connection. If there is a loose connection, connect the wire back.

 

Warning: The above table is only serve as a guide to understand your air con problem better.  Although there are tips and solutions provided in the table.  Do take note that unless you are trained to repair an air con.  It can be dangerous for to fix some of the problems yourself.  Therefore, it is better to get an aircon repair company to help you resolve your problem.  CitiCool provides all kinds of aircon repair services for different brands of air conditioning systems.  Do contact us if you have any query relating to your air con problem.

 

 

 

This post is also available in: Chinese (Simplified)

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