It’s one of the worst feelings on a scorching hot day in Singapore. You come home expecting a refreshing blast of cold air, but when you stand under the vent, you’re hit with a puff of warm, stuffy air. Your aircon is on, but it’s just not doing its job.
What’s going on?
First, it helps to know a little secret about your aircon: it doesn’t actually create cold air. Its real job is to remove heat from the air inside your home and transfer it outside. When your aircon starts blowing warm air, it means this heat removal process has broken down somewhere along the line.
Here are the most common reasons why this happens, starting with the simplest checks you can do yourself.
Step 1: The Simple Stuff (Check These First!)
Before you panic, take a look at these two common and easy-to-fix issues. You’d be surprised how often one of these is the culprit.
- Incorrect Thermostat Settings: This happens all the time! Someone in the house might have accidentally changed the settings.
- Check the Mode: Make sure the mode is set to ‘COOL’, not ‘HEAT’ or just ‘FAN’.
- Check the Fan Setting: Your fan should be set to ‘AUTO’, not ‘ON’. When set to ‘ON’, the fan will run continuously, even when the aircon isn’t actively cooling. This means it will blow cool air sometimes, and just circulate normal, uncooled air the rest of the time.
- No Power to the Outdoor Unit: Your aircon has two parts: the indoor unit (fancoil) and the outdoor unit (condenser). The indoor unit might be running and blowing air, but if the outdoor unit has lost power, no cooling can happen. Go to your home’s breaker box and check if the switch for your aircon has been tripped. If it has, try flipping it back on. If it trips again, there’s an electrical fault that needs a professional.
Step 2: Airflow Problems (Is Your Aircon Choking?)
If the settings are correct, the next thing to check is airflow. If air can’t move freely through the system, it can’t be cooled properly.
- Dirty, Clogged Air Filters: This is a huge cause of aircon problems. A dirty filter blocks air from entering the unit, much like trying to breathe with a blanket over your face. This lack of airflow can cause the indoor coil to freeze up, which also blocks air and leads to your unit blowing warm air.
- Solution: Clean your air filters! You should be doing this every 1-3 months.
- Dirty Coils (Indoor and Outdoor):
- The indoor evaporator coil is what absorbs heat from your air. If it’s covered in dirt and grime, it can’t do its job efficiently.
- The outdoor condenser coil is what releases that heat outside. If it’s blocked by leaves, dirt, or even nearby plants, the heat gets trapped, the system overheats, and it will stop cooling.
Step 3: Mechanical Problems (Time to Call a Professional)
If you’ve done all the simple checks and the air is still warm, it’s a sign of a more serious technical issue. These problems should always be handled by a qualified technician.
- Refrigerant Leak (Low on Gas): Refrigerant is the special liquid that flows through your system to move the heat. Your aircon has a precise amount of it in a closed loop. If there’s a leak, the system can’t cool properly. Signs of a leak include hissing sounds or ice forming on the coils. This is one of the most common reasons for an aircon blowing warm air.
- Solution: A professional must find the leak, repair it, and recharge the system with the correct amount of refrigerant.
- Malfunctioning Compressor: The compressor is the heart of your outdoor unit, responsible for pumping the refrigerant. If the compressor is broken, the entire cooling cycle stops. This is a major repair and requires a professional diagnosis.
- Faulty Run Capacitor: Capacitors are small parts that help the motors in your aircon start and run. If the capacitor for your compressor or outdoor fan fails, the outdoor unit won’t be able to release heat, resulting in warm air blowing inside.
How Vedha Diagnoses and Fixes the Problem
When your aircon is blowing warm air, you want a solution, not a guessing game. At Vedha, our technicians use a systematic process to find the real problem.
- We start with the basics, checking your thermostat settings and circuit breakers.
- We then perform a thorough inspection of the entire system’s airflow, from the filters to the indoor and outdoor coils.
- Using professional tools, we can safely test electrical components like the compressor and capacitors, and check refrigerant levels to pinpoint any leaks.
We’ll find the exact reason your air is warm and explain the best, most cost-effective way to get it running ice-cold again.
Don’t suffer through the heat with an aircon that’s not doing its job.
Call the experienced team at Vedha Construction at 96540044 or send us an email. We’ll get your cool air back in no time.
Vedha Aircon: Emergency & Same-Day Aircon Repair Singapore, Fair Prices, No Fuss.
We specialize in Aircon installation, repair, and service. We have all type & model of recon compressor, full set & fancoil. Our technicians are highly proficient in their respective field and repairs and fixes aircon of various brands.
