The Ultimate AC Maintenance Checklist for London, ON Homeowners
Prepare your air conditioner for the London, ON summer. Follow our guide to ensure a cool, efficient, and reliable system all season long.
Before the summer heat and humidity arrive in London — with temperatures reaching 30-35°C plus high humidity — preparing your air conditioner is essential. Annual maintenance not only prevents unexpected breakdowns during heat waves but also improves efficiency by 15% and extends your unit's lifespan by 3-5 years. Here's a comprehensive checklist from Hawana HVAC combining DIY tasks you can do yourself and professional services that keep your AC running perfectly.
DIY Maintenance Tasks for Homeowners
These simple steps can be done without a professional and make a huge difference in your AC's performance. Always turn off power to the AC at the breaker before performing any DIY maintenance.
Change Your Air Filter
This is the single most important task. A clogged filter restricts airflow, forcing the system to work harder and potentially freeze up. Check it monthly and replace it at least every 90 days. In homes with pets or during peak cooling season, change monthly. A clean filter improves efficiency by 5-15%.
Clear the Outdoor Unit
Remove leaves, grass clippings, twigs, and other debris from around your condenser unit. Ensure at least two feet of clear space for proper airflow. Restricted airflow reduces efficiency and can damage the compressor. Check the unit monthly during summer.
Clean the Condenser Coils
After turning off the power at the breaker, use a garden hose (on a gentle setting) to spray down the exterior fins, washing away dirt and grime. Never use a pressure washer — it will bend the delicate fins. Rinse from the inside out if possible.
Check the Condensate Drain Line
Ensure the drain line isn't clogged. If you notice standing water, slow drainage, or water leaking inside your home, a professional cleaning is needed to prevent water damage. Pour a cup of vinegar down the drain annually to prevent algae growth.
Professional AC Tune-Up Checklist
While DIY steps are helpful, a professional tune-up from a licensed TSSA-certified technician is crucial for system health, safety, and efficiency. Here's what a Hawana HVAC pro will do during your spring AC maintenance:
⚡ Inspect Electrical Components
Tighten connections, measure voltage, check capacitors, and inspect contacts to prevent electrical failure — a common issue in overworked systems. Loose connections cause 30% of AC breakdowns.
❄️ Check Refrigerant Levels
Too little or too much refrigerant (like the older R-22 or modern R-410A) indicates a problem and harms efficiency. We'll ensure levels are perfect and check for leaks. Low refrigerant is the #2 cause of AC failure.
⚙️ Lubricate Moving Parts
Proper lubrication of motors and bearings reduces friction and electricity use, preventing parts from wearing out prematurely. This simple step extends motor life by 3-5 years.
🧼 Clean Evaporator and Condenser Coils
We perform a deep cleaning beyond what a hose can do, removing caked-on grime to restore heat absorption and transfer capabilities. Dirty coils reduce efficiency by 30%.
🌡️ Thermostat Calibration
We ensure your thermostat is calibrated correctly so it accurately reads room temperature and cycles the AC appropriately. A miscalibrated thermostat wastes energy and causes discomfort.
🔍 Inspect Blower Assembly
We clean and inspect the blower fan and motor, ensuring proper airflow throughout your ductwork. A dirty blower reduces airflow and efficiency by up to 15%.
AC Maintenance Plans That Protect Your Investment
We offer two maintenance plans designed to keep your system running efficiently year-round. Both plans include priority service — you skip the line when you need repairs.
Basic Plan
- ✓ Annual furnace tune-up (fall) OR AC tune-up (spring)
- ✓ Filter replacement
- ✓ Priority service scheduling
- ✓ 10% discount on repairs
- ✓ Safety inspection
Premium Plan
- ✓ Annual furnace tune-up (fall)
- ✓ Annual AC tune-up (spring)
- ✓ Filter replacement (both visits)
- ✓ Priority service scheduling
- ✓ 15% discount on repairs
- ✓ Waived diagnostic fees ($175 value)
Abdullah Ghzail – Owner & Lead TSSA-Certified HVAC Specialist
"After hundreds of AC tune-ups across London, I can tell you that skipping spring maintenance is the #1 reason for emergency breakdowns during July heat waves. A $149 tune-up can prevent a $1,000+ emergency repair. It's not just about saving money — it's about comfort and safety. During every AC tune-up, we check refrigerant levels (low refrigerant damages compressors), clean coils (dirty coils reduce efficiency by 30%), and inspect electrical components (loose connections cause fires). Don't skip maintenance. It's the cheapest insurance you'll ever buy for summer comfort."
What London Homeowners Say About AC Maintenance
"I followed this checklist before summer near Springbank Park. Changed my filter and rinsed the outdoor unit myself. Then Abdullah came for the professional tune-up — found low refrigerant and a small leak. Fixed it before the 35°C heat wave hit. Our AC ran perfectly all summer and our hydro bill was $40/month lower than last year. The DIY tips saved me from a breakdown. Highly recommend both the checklist and the maintenance plan."
— Heath B. London ON · June 2025
"I used to skip AC maintenance to save money. Then our AC froze up during a heat wave near White Oaks — $600 emergency repair. Now I have the Premium Maintenance Plan. Abdullah does a thorough spring tune-up — cleans coils, checks refrigerant, inspects electrical components. Our AC hasn't failed in 3 years and our hydro bills are 15% lower. The DIY filter change reminder in this checklist is spot on. Don't skip maintenance — it's false economy."
— Dell T. London ON · July 2025
"This checklist convinced me to schedule professional AC maintenance. Abdullah's tune-up includes a 25-point inspection — he cleaned our condenser coils, checked refrigerant, tightened electrical connections, and even cleared our clogged condensate drain. Our 10-year-old AC runs like new and our hydro bill dropped $30/month near Masonville. The peace of mind knowing our AC won't fail during a heat wave is priceless. Highly recommend the Premium Maintenance Plan."
— Firth K. London ON · August 2025
AC Maintenance FAQ — 2026
The best time for AC maintenance is in the spring (April-May) before you need to use it regularly. This ensures it's ready for the first heatwave and allows for more flexible scheduling. Early spring tune-ups also catch issues before technicians get booked solid in June and July. We recommend scheduling your AC tune-up at the same time as your furnace tune-up (fall) if you have our Premium Maintenance Plan.
A well-maintained AC can run up to 15% more efficiently, which translates to significant savings on your monthly hydro bills. For the average London home spending $400-$600 annually on AC electricity, that's $60-$90 saved each summer. Regular maintenance also prevents costly emergency repairs ($500-$1,500) and extends equipment lifespan by 3-5 years. The $149 Basic Maintenance Plan pays for itself through energy savings alone.
Yes. Most manufacturers' warranties require proof of annual maintenance to remain valid. Skipping maintenance can void your warranty, leaving you exposed to 100% of repair costs. Regular service ensures your new system stays in peak condition, maintains efficiency, and protects your investment. The first year's tune-up is especially important to verify proper refrigerant charge and installation.
Change your air filter every 1-3 months depending on usage. In homes with pets, smokers, allergy sufferers, or during peak cooling season (June-August), change monthly. A clean filter improves efficiency by 5-15%, prevents system breakdowns (frozen coils), and improves indoor air quality. A clogged filter restricts airflow, forcing your AC to work harder and potentially freeze up. We replace filters during maintenance visits.
Signs your AC needs maintenance include: weak airflow from vents; warm air blowing (not cooling); unusual noises (grinding, squealing, banging); ice forming on refrigerant lines or outdoor unit; water leaking inside your home; rising energy bills without increased usage; or system running constantly without shutting off. Don't wait for a breakdown — schedule maintenance as soon as you notice any of these warning signs.
Turn off power to the AC at the breaker. Remove debris from around the unit. Use a garden hose with a gentle spray setting to rinse the exterior fins from the inside out (remove the fan grille or top panel first). Never use a pressure washer — it will bend the delicate fins. For deep cleaning of caked-on grime, hire a professional. We use specialized coil cleaners that restore heat transfer efficiency without damaging fins.
AC freeze-up is most commonly caused by: a clogged air filter (restricted airflow); low refrigerant levels (leak); dirty evaporator coils; blower motor issues; or outdoor temperatures below 18°C (65°F). If you see ice on your AC, turn it off immediately and call for service. Running a frozen AC can damage the compressor ($1,500-$2,500 replacement). Check your filter first — if it's clean, call a professional.
Our Basic Maintenance Plan is $149/year and includes a complete furnace tune-up (fall) OR AC tune-up (spring). The Premium Plan is $249/year and includes both furnace AND AC tune-ups (one in fall, one in spring), filter replacement both visits, 15% repair discount, and waived diagnostic fees. A one-time AC tune-up without a plan is $175. Considering that a single emergency repair can cost $500-$1,500, the tune-up pays for itself.
Our professional AC tune-up includes: inspect electrical connections and tighten; measure voltage and check capacitors; clean evaporator and condenser coils; check refrigerant levels and adjust; lubricate all moving parts; clean condensate drain line; inspect and clean blower assembly; check thermostat calibration; test safety controls; and measure system efficiency. The full inspection takes 45-60 minutes and covers over 25 inspection points.
You can safely do DIY tasks: change air filters, clear debris around outdoor unit, rinse condenser coils with a garden hose, and check condensate drain for visible blockages. However, professional maintenance requires specialized tools and training for: refrigerant level measurement, electrical testing, capacitor checking, deep coil cleaning, and safety control verification. DIY on refrigerant or electrical components is dangerous and can void warranties. Leave technical work to TSSA-certified professionals.
Stay Cool & Confident This Summer
Don't wait for a breakdown. Contact Hawana HVAC today to schedule your comprehensive AC tune-up in the London and St. Thomas, ON area. Join our maintenance plan and never worry about AC failure again.
📞 (647) 550-4220
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