Lennox
ENERGY STARLennox ML14KC1
Merit® Series · Single-stage · ENERGY STAR®
14.3+SEER2
Efficiency
14.3+ SEER2
Cooling
Single-stage
Sound
As low as 73 dB
Refrigerant
R-454B
Same-Day AC Service in Markham
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.
Same-Day AC Repair
Serving Markham & the GTA
TSSA Certified Technicians
5.0 Google & HomeStars
Customer Reviews·
5.0 / 5.0 · 104+ Google reviews
Markham AC Experts
Air Conditioning Repair Across Markham, Done Right Since 1999
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 27 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.
Emergency AC repair (24/7)
Same-day diagnostics and repair
Central air conditioning installation
Ductless mini-split installation
Multi-zone ductless systems
AC replacement and removal
Annual AC maintenance and tune-ups
Refrigerant recharge and leak detection
Condenser and coil service
Smart thermostat setup
24/7 Emergency
Real answer, day or night — no extra fees for evenings or weekends.
Upfront Pricing
A fixed price before any work starts. You approve it first.
Authorized Lennox Dealer
TSSA-certified, background-checked techs and full warranty support.
5.0★ · 250+ Reviews
Top-rated on Google and HomeStars, serving the GTA since 1999.
Equipment We Install
The Air Conditioners We Install in Markham
Central AC and ductless systems we install across Markham & the GTA — with manufacturer-published efficiency ratings.
York
ENERGY STARYork YXV (Affinity)
Affinity™ · Variable-capacity · ENERGY STAR®
up to 20SEER2
Efficiency
Up to 20 SEER2
Cooling
Variable-capacity
Sound
As low as 53 dBA
Compressor
Lifetime warranty
Mitsubishi Electric
ENERGY STARMitsubishi M-Series (MSZ-GS)
M-Series · Ductless inverter · ENERGY STAR®
up to 28.4SEER2
Efficiency
Up to 28.4 SEER2
Type
Ductless inverter
Sound
From 19 dB(A)
Setup
Single & multi-zone
KeepRite
KeepRite N5A8T
Performance · Two-stage
up to 18SEER2
Efficiency
Up to 18 SEER2
Cooling
Two-stage
Sound
As low as 69 dB
Refrigerant
R-454B
Payne
ENERGY STARPayne PA5S
PA5S · Single-stage · ENERGY STAR®
up to 16.5SEER2
Efficiency
Up to 16.5 SEER2
Cooling
Single-stage
Sound
As low as 73 dB
Sizes
1.5 – 5 tons
Kepler
Kepler Vortex 16
Vortex 16 · Single-stage
13.4SEER2
Efficiency
13.4 SEER2
Cooling
Single-stage
Refrigerant
R-410A
Warranty
10-yr parts + compressor
All specifications are published by the manufacturer. We install and service these systems across Toronto & the GTA.
Our Process
What to Expect From an AC Repair Visit in Markham
1
Describe the Problem
Tell us the symptoms over the phone. We dispatch a tech with the right parts.
2
Full AC Diagnostic
Refrigerant pressure, electrical testing, coil inspection, compressor and airflow checks.
3
Upfront Quote
A clear explanation and a fixed repair price. You approve before any work starts.
4
Repair and Verify
We fix it, run a full cooling cycle, check the temperature drop, and clean up.
Diagnostics
AC Problems We Fix Every Day in Markham
Most are solved same-day with parts we carry on our trucks.
AC Not Cooling
Low refrigerant, dirty condenser coils, failing compressor, or a frozen evaporator coil.
$150 – $600
AC Blowing Warm Air
Refrigerant leak, compressor issues, thermostat misconfiguration, or a clogged filter restricting airflow.
$100 – $450
Water Leaking from AC
Clogged condensate drain line, frozen evaporator coil, or a cracked drain pan.
$100 – $350
AC Short Cycling
Turning on and off rapidly without completing a cooling cycle. Oversized unit, dirty filter, low refrigerant, or electrical issue.
$100 – $400
Strange AC Noises
Grinding, squealing, buzzing, or banging from the indoor or outdoor unit.
$150 – $500
High Electricity Bills
Older 8 to 10 SEER units use nearly twice the electricity of a modern 16 SEER system.
Tune-up or replacement
Brands We Install
Trusted Equipment Brands We Install & Service
Authorized Lennox Dealer — with experienced installation, repair, and maintenance across our supported HVAC and water-heater brands.
FUJITSU
JOHN WOOD
$0
Down
Trusted Partner
Lease-to-Own Through Enbridge Sustain
Standard air conditioners are not covered by current rebate programs — but as a certified Enbridge Sustain Trusted Partner, we can install a new AC or heat pump in Markham with nothing down.
- No upfront cost — $0 down on approved credit
- Maintenance and repairs included for the term
- Predictable, manageable monthly payments
Common Questions
AC 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 a wide range of supported 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.
Get In Touch
Get a Free AC Estimate in Markham
Tell us what your AC is doing and we will get back to you fast. Same-day service available across Markham and the GTA — or call and talk to a real person now.
Call 24/7(416) 286-5665
Rated5.0★ on Google & HomeStars