End of Summer AC Maintenance Checklist: Prepare Your AC for Winter

As the intense summer heat of Bhubaneswar slowly starts to give way to the milder, cooler winter months, your air conditioner—which has been working overtime for the past six months—finally gets a well-deserved break.

However, simply turning off your AC with the remote until next spring is a huge mistake. Dust, moisture, and unaddressed wear-and-tear from the summer can manifest as severe mechanical failures, rust, and mold growth during the idle winter months. If you want your AC to roar back to life efficiently next April, you must follow a proper end-of-summer maintenance routine.

Here is the definitive guide and checklist from the experts at My Service Care on how to "winterize" and maintain your AC.

1. Deep Clean or Replace the Air Filters

This is the most crucial step you can take as a homeowner. Over the summer, your AC filters trap a massive amount of dust, pet dander, and airborne particles. If you leave these dirty filters inside the unit all winter, the accumulated dust becomes a breeding ground for bacteria and mold due to leftover moisture.

• Action: Open the front panel of your split AC. Carefully slide out the mesh filters.
• Cleaning: Wash them gently under running tap water. You can use mild soap if they are greasy.
• Drying: Ensure they are 100% dry before sliding them back in. Never install wet filters!

2. Run the Fan Mode to Evaporate Moisture

After your last cooling cycle of the season, there is still condensed water lingering on the evaporator coils inside the indoor unit. Leaving this water to stagnate during months of inactivity leads to foul smells and fungal growth.

• Action: Switch your AC to "Fan Only" mode (disable the cooling/compressor).
• Duration: Let it run on high speed for about 30 to 45 minutes. This blows room-temperature air across the coils, completely drying them out.

3. Gently Clean the Outdoor Condenser Unit

Your outdoor unit (the condenser) sits exposed to the elements. By the end of summer, it's likely choked with dried leaves, dirt, cobwebs, and road dust.

While you should leave deep chemical cleaning to the professionals, you can perform basic clearing:

• Turn off the main power supply to the AC.
• Use a soft brush or a vacuum cleaner to remove loose debris from the exterior fins.
• Ensure there is at least a 2-foot clearance around the outdoor unit. Cut back any overgrown bushes or plants.

4. Inspect for Unusual Noises or Performance Drops

Think back to the last few weeks you used the AC. Was it taking longer to cool the room? Did you hear any rattling or squealing noises? Was there ice forming on the copper pipes?

If you noticed any of these symptoms, do not ignore them during the winter. A small refrigerant leak or a failing capacitor is much cheaper to fix now than dealing with a completely burnt-out compressor when you try to turn it on next summer.

5. Consider a Professional 'End of Season' Tune-up

The absolute best way to protect the thousands of rupees you invested in your air conditioner is to book a professional service before winter sets in. A preventative maintenance check addresses issues you cannot see.

When you hire professionals like My Service Care for AC servicing, the technicians will:

• Perform a high-pressure jet pump cleaning to clear out deep-seated mud from the outdoor coils.
• Check the refrigerant (gas) levels to ensure there are no micro-leaks.
• Inspect the PCB, capacitors, and wiring for any signs of heat damage or short-circuiting.
• Tighten all electrical connections to prevent sparking.

6. Turn Off the Main Power Switch

Once you are completely done using the AC for the year, don't just turn it off with the remote control. Turn it off from the main MCB or the wall switch.

Leaving it in standby mode uses phantom power. More importantly, turning off the main switch protects the sensitive PCB inside the AC from electrical surges and voltage fluctuations that commonly occur during the winter months.