Spring is the right window for AC tune-up in the GTA. Our techs catch low refrigerant, dirty coils and weak capacitors before the first 30C day in June, when service backlogs hit 5 to 7 days. Run through the 12-point checklist below to prep your Mississauga, Toronto or GTA home for the cooling season.
The 12-Point Spring HVAC Checklist
Replace the furnace filter
Pull the old filter, note the size printed on the frame, and slide in a new one. MERV 8 to 11 is the sweet spot for most GTA homes. Replace every 3 months during heavy AC use, every 6 months otherwise.
Vacuum the indoor return grilles
Use the brush attachment on your shop vac to clear the supply and return registers of dust, pet hair and cobwebs. Restricted airflow is the number one cause of frozen evaporator coils.
Clean the outdoor condenser fins
Cut the power at the outdoor disconnect first. Use a garden hose on a gentle setting to rinse leaves, grass clippings and cottonwood seed off the aluminum fins. Spray from the inside out if you can access the centre.
Inspect the condensate drain line
Find the white PVC line running from the indoor air handler to outside the house. Confirm it slopes downward continuously, has no kinks, and that the exit is unobstructed. Pour 1 cup of distilled white vinegar in the access port to prevent algae blooms.
Test the thermostat in cool mode
Switch the thermostat to cool and lower the setpoint 5 degrees below room temperature. Within 90 seconds you should hear the outdoor unit start and feel cool air at every supply register. If a register feels warm, you have a ductwork issue.
Check the refrigerant pressure (call a tech)
Refrigerant pressure requires gauges, a Section 608 certified handler and EPA-compliant disposal of any recovered refrigerant. Do not attempt this yourself. Book the tech-only steps as a $100 spring AC tune-up.
Inspect electrical connections
A licensed tech tightens contactor lugs, checks capacitor microfarad ratings against the nameplate, and verifies the start and run windings on the compressor. Loose connections cause arcing, which destroys compressors.
Lubricate motors if accessible
Older blower and condenser fan motors have oil ports. Newer ECM motors are sealed and need no lubrication. Check your unit manual or have a tech identify which type you have.
Clear plant growth from the outdoor unit
Cut back any shrubs, vines or grass within 24 inches of the condenser. The unit needs unobstructed airflow on all four sides. Avoid wrapping the unit in a cover during the cooling season because that traps moisture.
Test the AC capacitor (call a tech)
Capacitors are the most common AC failure in the GTA. They look fine outwardly but read low on a multimeter when weak. Our techs test capacitors during the spring tune-up and replace any reading more than 10 percent below the nameplate rating.
Verify ductwork has no winter rodent damage
Mice nest in unused ductwork over winter. Spring is the right time to inspect duct interiors with a camera (we offer this as part of duct cleaning) and seal any chewed flex duct.
Schedule the professional tune-up
The DIY steps above handle the basics. The 4 tech-only items (refrigerant, electrical, capacitor, motor lubrication) require a licensed HVAC technician. Book EcoFrost for a $100 spring AC tune-up through May 31, 2026.
DIY vs Professional Steps
Eight of the twelve items above are DIY-safe and take a total of 60 to 90 minutes. The other four items require a TSSA-licensed HVAC technician with refrigerant gauges, a multimeter and Section 608 certification. Our $100 spring AC tune-up covers all four pro-only items plus the condensate flush.
Why Spring Is the Right Window
- No June rush: same-day dispatch slots, no 5 to 7 day backlog
- Lower refrigerant prices: cooler weather lets us top-off without peak-season surcharges
- Rebate paperwork: file Enbridge and Save on Energy rebates in spring for spring payouts
- Catch low refrigerant before it kills the compressor: refrigerant loss often shows in spring
- Pre-empt the first failure: 30 percent of summer no-cool calls are problems we would have caught in spring
EcoFrost $100 Spring AC Tune-Up
Our spring AC tune-up runs $149 normally. Through May 31, 2026 we offer it at $100 to fill the spring slots before peak cooling season. The tune-up includes a 12-point inspection, indoor coil cleaning, outdoor condenser rinse, refrigerant pressure check, electrical tightening, capacitor test and condensate line flush. Takes 60 to 90 minutes per system.
Book your $100 spring AC tune-up across Mississauga, Toronto, Brampton or the GTA before May 31.
Book $100 AC Tune-UpWhen To Skip Tune-Up and Replace
Skip the spring tune-up and plan a replacement if your AC is 12 plus years old, runs on R-22 refrigerant (banned, expensive to top-off), or has needed repairs more than 50 percent of replacement cost in the last 24 months. Our techs flag this honestly during the tune-up so you can plan the upgrade for fall when install slots are easier to book.
?Frequently Asked Questions
How often should I service my HVAC system?
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Do I need to service my heat pump in spring and fall?
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EcoFrost Heating & Cooling
Toronto's Trusted HVAC Experts Since 2015
Our certified HVAC technicians have served 5,000+ Toronto-area homes. We write about heating, cooling, and air quality from real field experience not marketing copy. Learn about us →
