Common Air Conditioning Problems You Can Fix Yourself (And When to Call a Pro)
When your air conditioning system isn’t working as it should, it’s tempting to panic and call a technician straight away. However, some issues are simple enough for you to fix yourself. In this guide, we’ll walk you through common air conditioning problems, quick DIY solutions, and when it’s time to bring in a professional AC technician.
1. The AC Isn’t Cooling Properly
What You Can Do:
Double-Check the Thermostat: Ensure it’s set to “cool” and the temperature is lower than the room temperature. Be careful when selecting the mode, as the snowflake (cooling) and sun (heating) icons can look similar at a glance.
Inspect the Filters: Dirty filters restrict airflow. Clean or replace your air conditioner filters every 1-3 months.
Check the Vents: Ensure all vents are open and not blocked for proper airflow.
When to Call a Tech:
If the unit blows warm air despite clean filters and an accurate thermostat.
If airflow remains weak or uneven, which could point to a larger issue.
2. The Unit Won’t Turn On
What You Can Do:
Check the Power Supply: Ensure the AC is plugged in and the circuit breaker hasn’t tripped.
Inspect the Remote or Thermostat Batteries: Replace the batteries if they’re flat or low.
When to Call a Tech:
If the AC trips the breaker repeatedly or still won’t turn on despite a functioning power supply.
3. Strange Noises Coming from the Unit
What You Can Do:
Tighten Loose Screws: Loose panels can cause rattling sounds.
Clean the Outdoor Unit: Leaves, dirt, and debris can cause buzzing or humming noises.
When to Call a Tech:
If you hear grinding, squealing, or banging noises, as these could mean issues with the motor or compressor.
4. Water Leaks Around the Unit
What You Can Do:
Check the Drain Line: If it’s clogged, try using a wet/dry vacuum to clear it.
Inspect the Drain Pan: Empty it if it’s full and look for any cracks or other damage.
When to Call a Tech:
If the water leak persists or water is dripping from unusual places, it may indicate a refrigerant issue or a blocked drain line.
5. Foul Smells from the AC
What You Can Do:
Clean the Filters: A clogged filter can trap odours and impact indoor air quality.
Check for Mould: Inspect and clean the drain pan and evaporator coil if accessible.
When to Call a Tech:
If the smell persists or worsens, it could indicate mould inside the system, requiring professional cleaning.
When to Call a Professional
If your DIY efforts don’t resolve the issue, or if you notice the following, it’s time to call in an AC technician:
Unusual Sounds or Smells: These could indicate internal issues like motor failure or mould growth.
Frequent Cycling: The unit switches on and off too often, which could mean a problem with the thermostat or compressor.
Unresponsive System: When the AC doesn’t respond to controls or repeatedly trips the circuit breaker.
High Energy Bills: If your electricity bills have spiked unexpectedly, your air conditioning system may not be operating efficiently.
Final Thoughts
Routine air conditioning maintenance can help prevent many common problems and improve the efficiency of your system. By following these tips, you’ll know when to fix your air conditioner yourself and when to leave it to the professionals.
If you’re unsure or need professional assistance, feel free to contact Artarmon Air Conditioning. We specialise in air conditioning repairs, service, and maintenance across Sydney’s North Shore, Northern Beaches, and inner-city areas. We’re here to keep your home cool and comfortable year-round!
