Air Conditioning Repair in Markham
When your air conditioning fails on a 32°C afternoon in Unionville or Thornhill, you need someone who can get there today. Megacity HVAC provides same-day AC repair across Markham with TSSA-certified technicians and upfront pricing.
Reliable Air Conditioning Service Across Markham
Markham is one of the fastest-growing cities in the GTA, with over 345,000 residents spread across Unionville's heritage core, the high-density condo belt along Highway 7, the executive estates of Cathedraltown, and the long-established neighbourhoods of Thornhill and Markham Village. That diversity of housing types — from 1970s split-levels to brand-new 4,000 sq ft homes — means a wide range of AC systems, ages, and common issues.
Megacity HVAC has serviced Markham homes for over 25 years. The postwar homes around Thornhill and the older streets of Markham Village often have retrofitted central AC added decades after construction — these systems are typically 15 to 20 years old now and at end-of-life. Cornell and Berczy Village homes built in the early 2000s are reaching the 20-year replacement mark. Newer Angus Glen and Cathedraltown estates often have multi-zone configurations that need specialized service.
Our trucks carry the most common AC parts: capacitors, contactors, fan motors, refrigerant, thermostats, and drain pans. Most Markham AC repairs are completed on the first visit in one to two hours. We diagnose the problem, give you a firm price, and get your cooling running again without delay.
When replacement is the smarter call, we install central AC and ductless mini-split systems from Lennox, Carrier, Trane, Ducane, and Daikin. As an Authorized Lennox Dealer and Enbridge Sustain Trusted Partner, we offer competitive pricing, extended warranties, and handle all rebate paperwork.
AC Services
Common AC Problems in Markham Homes
We diagnose and repair these issues daily during cooling season across Unionville, Thornhill, Cornell, and every other Markham neighbourhood.
AC Not Cooling
Low refrigerant, dirty condenser coils, failing compressor, or a frozen evaporator coil.
AC Blowing Warm Air
Refrigerant leak, compressor issues, thermostat misconfiguration, or a clogged filter restricting airflow.
Water Leaking from AC
Clogged condensate drain line, frozen evaporator coil, or a cracked drain pan.
AC Short Cycling
Turning on and off rapidly without completing a cooling cycle. Oversized unit, dirty filter, low refrigerant, or electrical issue.
Strange AC Noises
Grinding, squealing, buzzing, or banging from the indoor or outdoor unit.
High Electricity Bills
Older 8 to 10 SEER units use nearly twice the electricity of a modern 16 SEER system.
Central Air vs Ductless: Which Is Right for Your Markham Home?
The right system depends on your home's ductwork, budget, and how you use your space. We help you choose during a free in-home assessment.
Central Air Conditioning
Ductless Mini-Split
Not sure which option fits your Markham home? Free in-home assessments, no obligation.
Get a Free AC AssessmentAC Repair Across All Markham Neighbourhoods
We service every corner of Markham. Our techs know the housing stock, the common issues, and the fastest routes to reach you.
Markham Homeowners — Save on Your New AC
As a certified Enbridge Sustain partner, we help Markham homeowners access rebates on qualifying high-efficiency cooling equipment. We handle all the paperwork so you don't have to.
Learn About RebatesAC Repair Markham — FAQ
How much does AC repair cost in Markham?
AC repair in Markham typically runs $150 to $600. Capacitor and contactor replacements land at $150 to $250. Compressor work, refrigerant leak repairs, and evaporator coil replacements range from $300 to $600. We provide upfront pricing after diagnosis and apply the diagnostic fee to the repair cost if you proceed.
Do you offer same-day AC repair across Markham?
Yes. We dispatch same-day to all Markham neighbourhoods including Unionville, Thornhill, Cornell, Milliken, Berczy Village, Cathedraltown, Markham Village, and Angus Glen. During peak summer we prioritize no-cooling emergencies. Call (416) 286-5665 and a TSSA-certified technician is usually at your door within a few hours.
Should I repair or replace my Markham home AC?
Replace if your unit is over 10 years old, uses R-22 refrigerant, or a single repair exceeds half the cost of a new system. Many Cornell and Berczy homes built in the early 2000s are at the replacement window now. A new 16 SEER central AC installs for $3,500 to $5,500 and pays back through lower hydro bills.
Do you service multi-zone AC systems in larger Markham homes?
Yes. Executive homes in Angus Glen, Cathedraltown, and upper Unionville often have dual or zoned central AC systems with multiple thermostats. We service all major brands and can repair individual zones, replace zone dampers, or recalibrate control boards. We also install multi-stage variable-speed systems that give different floors different comfort levels without a full rework.
Do you repair ductless mini-splits in Markham condos and townhomes?
Yes. Many Markham townhomes and condo developments use Daikin, Mitsubishi, or LG ductless systems. We service and repair all major ductless brands. Common issues include refrigerant leaks at the line-set flare fittings, failed blower motors, and drain pump malfunctions. Most ductless repairs are $200 to $500.
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Our HVAC Services
AC Broken in Markham? Call Us Today
Same-day AC repair, transparent pricing, and 27+ years of experience. Call now or request a free estimate online.