Aircon Not Cooling Properly

Introduction

Is your air conditioner blowing warm air instead of a cool breeze? It’s a frustrating problem, especially on a hot day. An aircon that’s not cooling properly can make your home uncomfortable and lead to higher energy bills. Addressing this issue promptly is important to prevent further damage to your unit and ensure your home stays cool and comfortable. This guide will walk you through some simple troubleshooting steps to help you identify and fix the problem yourself. Explore more in our Air Conditioner Troubleshooting 3 collection.

Common Causes of aircon not cooling properly

Here are some of the most frequent reasons why your aircon might not be cooling as it should:. For more related activities, check out our Ac Unit Has Water Around It.

• Dirty Air Filter: A clogged filter restricts airflow, making the aircon work harder and less efficiently.
• Dirty Condenser Coils: The outdoor unit’s coils release heat. If they’re dirty, they can’t do this effectively.
• Frozen Evaporator Coils: Restricted airflow or low refrigerant can cause the indoor coils to freeze.
• Low Refrigerant: Refrigerant is the cooling agent. A leak will reduce its level, impacting cooling performance.
• Blocked Condensate Drain Line: A clogged drain line can shut down the unit and cause water damage.
• Faulty Capacitor: The capacitor helps start and run the motor. A failing capacitor can prevent the compressor from working properly.
• Fan Problems: Both indoor and outdoor fans need to work to circulate air and expel heat.
• Incorrect Thermostat Settings: Sometimes, the simplest solution is just adjusting the thermostat!
• Duct Leaks: Leaky ducts allow cooled air to escape before it reaches your rooms.
• Dirty Blower Wheel: A dusty blower wheel impacts overall airflow from the system.

Symptoms Checklist

Use this checklist to help pinpoint the problem:

• Warm air blowing from the vents.
• Aircon runs constantly but doesn’t cool the room.
• Ice buildup on the indoor or outdoor unit.
• Unusual noises coming from the aircon.
• Higher than usual energy bills.
• Water leaking from the indoor unit.
• Air flow is very weak

How to Fix aircon not cooling properly Step-by-Step Guide

Follow these steps to troubleshoot your aircon:

1. Check the Thermostat: Ensure it’s set to “Cool” and the temperature is lower than the current room temperature.
2. Inspect the Air Filter: Remove the filter and hold it up to the light. If you can’t see through it, it’s dirty.
3. Clean or Replace the Air Filter: Wash a reusable filter with mild soap and water or replace a disposable one.
4. Check the Outdoor Unit (Condenser): Make sure the unit is free from obstructions like leaves, branches, or debris.
5. Clean the Condenser Coils: Turn off the unit at the breaker. Use a garden hose (gentle spray) to clean the coils from the inside out. You can also use a coil cleaner available at hardware stores.
6. Inspect the Indoor Unit (Evaporator): Check for ice buildup on the coils. If you see ice, turn off the unit and let it thaw completely (several hours).
7. Check the Condensate Drain Line: Locate the drain line (usually a PVC pipe) and make sure it’s not clogged. You can use a wet/dry vacuum to suck out any blockage.
8. Ensure Vents are Open: Close vents in rooms that are not used and make sure all other vents are fully open.
9. Check for Duct Leaks: Inspect exposed ductwork for any obvious holes or tears. Seal these with duct tape.
10. Reset the Aircon: Turn off the unit at the breaker for 30 minutes, then turn it back on.
11. Clear the area around the indoor vents: Ensure that furniture or curtains aren’t blocking vents, impeding airflow.

Fix the Issue Without Buying Parts

Many aircon problems can be resolved without spending money on new parts:

• Regular Cleaning: Clean the air filter monthly and the condenser coils annually to prevent buildup.
• Thermostat Calibration: Check your thermostat’s manual for calibration instructions.
• Preventative Maintenance: Schedule annual professional maintenance to catch problems early.
• Clear Obstructions: Trim bushes and weeds around the outdoor unit to ensure proper airflow.

When Replacement Might Be Necessary

Sometimes, the problem requires professional help or component replacement. If the compressor fails, the refrigerant leaks persist, or the unit is very old (15+ years), replacement might be the best option. Here are some commonly failing parts:. Discover more free resources across our collection library.

• Compressor: $800 – $2000 (including labor)
• Capacitor: $50 – $200 (including labor)
• Refrigerant Line: $200 – $600 (including labor)

Full unit replacement typically ranges from $3,000 to $7,000 depending on the size and efficiency of the new unit.

Safety Warning

Always prioritize safety when working with electrical appliances:

• Turn Off Power: Always turn off the aircon at the breaker before performing any maintenance.
• Avoid Water: Never use water near electrical components.
• Read the Manual: Refer to your aircon’s manual for specific safety instructions.
• Wear Gloves: Protect your hands when cleaning coils or handling potentially sharp objects.

Tools You May Need

Here are some basic tools that might be helpful:

• Screwdriver (Phillips and flathead)
• Garden hose with a spray nozzle
• Fin comb (for straightening bent condenser fins)
• Wet/dry vacuum
• Duct tape
• Work Gloves
• Safety Glasses

FAQ

Here are some frequently asked questions:

• Q: Why is my aircon blowing warm air even after I cleaned the filter?
  A: There could be several reasons, including low refrigerant, frozen evaporator coils, or a faulty compressor.
• Q: How often should I clean my air filter?
  A: At least once a month, or more often if you have pets or allergies.
• Q: How do I know if my aircon is low on refrigerant?
  A: Common signs include weak airflow, warm air, and ice buildup on the coils.
• Q: Can I add refrigerant to my aircon myself?
  A: No, it’s best to leave refrigerant handling to a qualified technician because it requires specific tools and knowledge. Improper handling can harm the environment.
• Q: Why is my aircon leaking water inside?
  A: This is likely due to a clogged condensate drain line.
• Q: How do I prevent my coils from freezing?
  A: Ensure proper airflow by regularly cleaning the air filter and condenser coils. If the problem persists, call a technician as it could be a sign of low refrigerant or other more serious problems.

Conclusion

Troubleshooting an aircon that’s not cooling properly can seem daunting, but many problems can be resolved with a few simple steps. By following this guide, you can potentially save money on repair costs and keep your home comfortable. If you’ve tried these steps and your aircon is still not cooling, it’s best to call a qualified HVAC technician for professional assistance. Don’t hesitate to get a pro opinion to ensure that any other repairs are done by an experienced expert.

Youtube Video: