DIY AC Maintenance Guide for Kelowna Residents

When it comes to ensuring indoor comfort, air conditioning systems are especially important in Kelowna’s scorching summers. Regular maintenance is crucial to ensuring the effectiveness and efficiency of your AC unit. We’ll walk you through a thorough DIY AC maintenance in this tutorial to help you maintain your air conditioning system without hiring a pro.

Table of Contents

AC Maintenance Guide Kelowna

Why AC Maintenance Matters

Your AC system might benefit greatly from routine maintenance. It not only lowers your energy costs but also increases the general quality of the air within your home while extending the life of your equipment. You may increase the longevity and effectiveness of your cooling system by devoting some time to maintenance.

Tools You'll Need

Get the required tools together before you begin. Among the tools required for maintenance are a screwdriver, a coil cleaner, a fin comb, and a vacuum cleaner. A smooth and effective maintenance process is ensured by having the proper instruments on hand.

Safety First

When working with any electrical equipment, safety must always come first. To start, turn off the AC unit’s electricity to avoid any mishaps. Wear gloves to protect your hands, and make sure the space where you’re working is well-ventilated to prevent breathing in dust or other particles.

Cleaning or Replacing Air Filters

Your air conditioner’s air filters are essential for ensuring clean indoor air. Every one to three months, depending on the type of filter, it should be cleaned or replaced. Filters that are clogged can prevent airflow, making the system work harder and using more energy than is necessary.

To clean or replace the filter, follow these simple steps:

  1. Turn off the AC unit to ensure your safety.
  2. Locate the filter – it’s usually near the air handler.
  3. Remove the filter and inspect its condition.
  4. Clean the filter by gently vacuuming or washing it, or replace it with a new one if necessary.
  5. Reinsert the filter and ensure it’s properly seated.


By keeping your air filters clean, you’re not only ensuring better air quality but also improving the efficiency of your AC system.

Cleaning the Evaporator and Condenser Coils

Your air conditioner’s coils are in charge of heat transfer and effective cooling. These coils may become clogged with dirt and debris over time, decreasing their effectiveness. For them to be as effective as possible, cleaning is essential.

To clean the coils, follow these steps:

  1. Turn off the power to the AC unit.
  2. Access the coils – the evaporator coil is usually located inside, while the condenser coil is outdoors.
  3. Apply a coil cleaner as per the manufacturer’s instructions.
  4. Gently brush the coils to remove dirt and debris.
  5. Rinse the coils with water using a sprayer or a hose.
  6. Allow the coils to dry completely before turning the AC unit back on.


Regular coil cleaning ensures that your AC unit can cool efficiently and effectively, saving energy in the process.

Straightening Bent Fins

Your AC unit’s coils have tiny fins that are easily bent. Airflow is obstructed by bent fins, which lowers system effectiveness. To guarantee ideal airflow, you can gently straighten the fins with a fin comb.

Here’s how to do it:

  1. Turn off the AC unit to prevent any accidents.
  2. Locate the bent fins on both the evaporator and condenser coils.
  3. Gently run the fin comb through the fins to straighten them.
  4. Be cautious not to damage the fins further – use a light touch.


By straightening the fins, you’re allowing unrestricted airflow, which is crucial for effective cooling.

Clearing Debris Around the AC Unit

You should maintain a clean and clutter-free environment surrounding your outdoor air conditioning equipment. As leaves, dirt, and other debris build up over time, airflow can become obstructed, decreasing the effectiveness of the system.

To ensure a clear area around the unit:

  1. Regularly inspect the surroundings of the outdoor unit.
  2. Remove any debris that has accumulated around the unit.
  3. Trim vegetation to ensure it doesn’t encroach on the unit.


By maintaining a clear space, you’re allowing proper airflow, which directly impacts your AC’s performance.

Checking and Cleaning the Drainage Line

Your AC system’s drainage line has the crucial job of removing extra moisture. Algae, mold, and debris can accumulate in this line over time, potentially causing water leaks and damage.

Here’s how to check and clean the drainage line:

  1. Locate the drainage line’s opening – usually near the indoor air handler.
  2. Inspect for any blockages – if you notice any, it’s time for cleaning.
  3. Use a mixture of bleach and water or a specially formulated cleaner to flush the line and remove buildup.
  4. Pour the solution into the opening and allow it to sit for a few minutes.
  5. Flush the line with water to clear out the debris and solution.


By keeping the drainage line clean, you may avoid any water damage and guarantee that moisture is effectively drained away from your air conditioning system.

Inspecting the Refrigerant Levels

The effectiveness of your AC system’s cooling depends on the refrigerant levels. However, refrigerant level adjustments need specialist equipment and need to be left to experts. The best course of action if you believe there is a refrigerant problem is to call a trained expert who can diagnose and fix the issue.

Testing the Thermostat

For efficient cooling and to maintain a suitable indoor climate, a properly calibrated thermostat is essential. To evaluate and adjust your thermostat:

  1. Turn off the AC unit to prevent any sudden changes in temperature.
  2. Use a thermometer to compare the thermostat’s reading with the actual room temperature.
  3. If there’s a discrepancy, follow your thermostat’s manual to recalibrate it.


A properly functioning thermostat ensures your AC system is cooling effectively without unnecessary energy consumption.

Sealing Duct Leaks

Leaky ducts can lead to cooled air escaping before it reaches your living spaces, resulting in energy wastage. To identify and seal duct leaks:

  1. Inspect visible ducts for any visible gaps or cracks.
  2. Use foil tape or mastic to seal leaks – ensure the ducts are clean before applying.
  3. Consider professional duct sealing for concealed or hard-to-reach ducts.


By sealing duct leaks, you’ll ensure that the cooled air is efficiently delivered to where it’s needed most.

Replacing Batteries in the Thermostat

A malfunctioning thermostat can disrupt your AC’s performance. Often, the issue is as simple as dead or weak batteries. To replace thermostat batteries:

  1. Turn off the AC system to prevent any electrical mishaps.
  2. Open the thermostat’s battery compartment – this is usually straightforward.
  3. Replace old batteries with new ones – follow the correct polarity.
  4. Close the battery compartment and turn the AC system back on.


Regular battery replacement ensures your thermostat is working accurately, enabling precise temperature control.

Regular Maintenance Schedule

To maintain your AC system’s optimal performance, follow this recommended maintenance schedule:

  • Spring: Clean or replace air filters, clear debris around the outdoor unit.
  • Summer: Check and clean the drainage line, inspect thermostat functionality.
  • Fall: Clean coils, straighten bent fins, inspect and seal ducts.
  • Winter: Replace thermostat batteries, ensure the unit is free of debris.


By following this routine, you’ll keep your AC system running efficiently year-round.


Regular DIY AC maintenance is a preventative measure that increases the longevity of your cooling system in addition to its efficiency. Residents of Kelowna can enjoy maximum interior comfort while reducing energy usage and potential repair expenses by setting aside some time for these maintenance tasks. Although homeowners may complete these activities, it is always advisable to get expert assistance for complicated problems or refrigerant modifications. Maintaining your air conditioning system will ensure worry-free cooling for years to come.


Generally, depending on usage and indoor air quality, air filters should be cleaned or changed every one to three months.

Refrigerant level adjustments require specific tools and experience. It’s advisable to let qualified experts handle this task.

Yes, sealing duct leaks is crucial. Leaky ducts can lead to energy wastage and reduced cooling efficiency.

One expert AC maintenance appointment per year is advised, ideally before the cooling season starts.