Common Reasons for Aircon not blowing cold air & How to Fix

1. Dirty or Clogged Air Filters

One of the most prevalent reasons for reduced cooling efficiency is dirty or clogged air filters. Singapore's humid and dusty conditions can cause filters to become quickly congested with particles, obstructing proper airflow and heat exchange. Regularly cleaning or replacing air filters every 1 to 3 months is essential to maintain optimal cooling performance.

Solution: Take out the aircon air filter and thoroughly clean them under water and dry them with a cloth before placing it back in the aircon. If the dirt is rigid, you may need a special chemical cleaner to remove it.

Cost: No cost if you can do it yourself. Getting an HVAC technician to conduct a general servicing can cost anywhere between $19 - $25 per aircon unit.

2. Excessive Dust and Debris on Evaporator Coil

Accumulated dust and debris on the evaporator coil can insulate it, preventing efficient heat exchange leading to inefficient cooling. This can be prevented with regular aircon servicing to keep the evaporator coil clean.

Solution: You would need a chemical wash or chemical overhaul depending on the extent of the debris. This can only be executed by trained aircon technician, so do not try this yourself as the chemical used can caused harm to you and the system if not used as intended.

Cost: Check pricing and book here - Chemical Wash and Chemical Overhaul

3. Low Refrigerant Levels or Gas Leakage

Refrigerant is the lifeblood of your air conditioning system, responsible for absorbing and releasing heat. Low refrigerant levels can hinder the cooling process, resulting in inadequate temperature regulation. If you suspect a refrigerant leak, it's imperative to contact a professional technician to assess and replenish the refrigerant.

Solution: If your aircon has not received a refrigerant gas refill for a long time then it might be low on gas. Refilling the gas in the condenser will to get the cool air again. If the refrigerant gas level is low after a recent refill, then it may be because of gas leakage. Refrigerant gas leakage is the hardest to spot and fix with a lot of uncertainty, in most cases it is recommended to replace the entire air condition system with a new one.

Cost: Check gas refill pricing and book here - Aircon Gas Top Up

4. Faulty Thermostat

The thermostat is the control center of your aircon, dictating when the cooling cycle begins and ends. A malfunctioning thermostat can lead to inaccurate temperature readings and inconsistent cooling. Calibrating or replacing the thermostat can help restore proper cooling function.

Solution: In most cases it is advised to install a new thermostat.

Cost: Estimated cost is anywhere between $100 to $250 for the thermostat itself and an additional $50 to $150 for labor charges.

5. Malfunctioning or Blocked Condenser Unit

The condenser unit, usually located outside, releases the heat absorbed from your home's interior. If the condenser fins are obstructed by dirt, debris, or vegetation, it can impede heat dissipation and reduce cooling efficiency. Regularly cleaning the condenser unit and ensuring adequate clearance can alleviate this issue.

Malfunctioning of the condenser components like the condenser motor, the PCB or capacitor, can also result in improper or no cooling. Get an air conditioner technician to troubleshoot and fix it for you.

Solution: The solution depends on the root cause of the problem. Submit a request for aircon repair with us. Our technician will visit your premises to troubleshoot and identify the root cause of the problem and advise on the solution.

Cost: The actual cost will vary based on the root cause or the problem, which can only be identified after the technician has completed the troubleshooting.

6. Faulty Thermistor Sensor

The thermistor sensor helps the air conditioning system to regulate the cooling or heating process by tracking the temperature of the indoor aircon unit. A malfunctioning thermistor it will provide inaccurate reading to the A/C system, hence will impact the cooling mechanism.

Solution: The thermistor needs to be replace with a new one.

Cost: Thermistor replacement can cost anywhere between $120 to $250 including the material, transport and technician labor cost.

7. Inadequate Maintenance

Like any complex system, air conditioners require regular maintenance to perform optimally. Over time, components may wear out, electrical connections may loosen, and efficiency may decline. Scheduling annual professional maintenance can address potential issues before they disrupt your aircon's cooling capabilities.

Solution: Get a annual servicing package, so that a general cleaning and maintenance of the aircon units can be conducted on a regular basis.

Cost: Check pricing and book here - Annual Servicing Package

8. Insufficient Airflow

Blocked vents, obstructions around the indoor unit, or a malfunctioning fan can lead to inadequate airflow. Insufficient airflow inhibits heat exchange and cooling efficiency. Regularly clean and clear vents, and ensure there's proper clearance around the indoor unit.

Solution: Remove any blockages and obstructions around the aircon units.

Cost: No Cost involved