Certified HVAC Technicians
Markham homeowners count on heating and cooling systems built to handle 55°C seasonal temperature swing. Smile HVAC has served Markham’s residential properties for over 15 years with TSSA-certified technicians licensed in gas, plumbing, electrical, and refrigeration. Smile HVAC specialists diagnose furnace failures and air conditioning breakdowns honestly, pricing every repair before work begins. HVAC repair in Markham addresses recurring failures across furnaces, air conditioners, heat pumps, and water heaters from Carrier, Lennox, Rheem, Amana, Heil, Trane, Daikin, Samsung, and Bosch.
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A Lennox furnace failed mid-January from igniter wear. Same-day replacement restored heat
A Carrier air conditioner in Cornell lost cooling from a coil leak. Diagnostics confirmed the source before recharging
A Trane system short-cycled during a heat wave. Filter replacement restored airflow
A Samsung mini-split in Unionville cycled erratically. Recalibration resolved uneven temperatures
A Daikin heat pump in Berczy Village locked into auxiliary mode. Board replacement cut energy costs by 35% (Smile HVAC data, 2025)
A Rheem tank unit in Markham Village produced inconsistent hot water. Flushing sediment fixed output
We begin with a thorough assessment of your Heating Systems or Air Conditioning Systems. Our technicians identify the root cause of the issue, explain the problem clearly, and provide transparent recommendations for HVAC repair in Markham .
Once approved, we perform precise repairs using quality parts and proven methods. Whether it’s a furnace, air conditioner, or full system upgrade, we ensure your equipment operates safely and efficiently.
After completing the work, we test the entire system to confirm peak per formance. We also provide maintenance tips to help prevent future breakdowns and keep your HVAC system running reliably in ever y season.
Todd Wilkie
Apr, 2026
Mr. CHIN
Apr, 2026
Bon Orallo
Apr, 2026
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R. J Sum
Apr, 2026
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Danny Ren
Mar, 2026
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Blair Baxter
Mar, 2026
S Hammie
Feb, 2026
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Devika Shah
Feb, 2026
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Derek Smith
Feb, 2026
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Alexander Miretsky
Jan, 2026
Smile HVAC did a great job installing a new furnace for us. Karl arrived quickly and performed a thorough diagnostic. Valery installed the new furnace the very same day, and Genady provided a fair price and coordinated everything seamlessly.
All the work was completed quickly and professionally—even on a bitterly cold winter day at –15°F. Truly top-tier service. We really appreciate everyone’s efforts!
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Stay comfortable year-round with trusted heating and cooling services from Smile HVAC. Call us or send a request and our team will get back to you as soon as possible.
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We provide the best and honest prices in the GTA area and delivery the best quality work. We believe in integrity and provide honest advice to all our customers and make them aware of the work needed. This helps in maintaining a trustworthy relationship with customers.
Smile HVAC is built on the trust and quality we have been delivering through our services. These are the basis of our company and we continue to hold the standards up. We offer a full range of services and have expertise in furnace installation & repair and ac installation services.
When it comes to paying for the work done or the services offered, we care about your comfort. We have multiple payment options to pay and also offer affordable ways to pay for the job done. Giving our customers the ease and flexibility to pay.
All our technicians are fully licensed for working and are trained with the best of knowledge and hands-on experience. They not only complete their job but go the extra mile on educating the customer about the issue and deliver expert advice.
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Markham sits within Plant Hardiness Zone 6a in the Greater Toronto Area, classified as a humid continental climate (Köppen Dfb). January averages −5.9°C and July averages 21.3°C, with annual precipitation reaching 953 mm and average relative humidity at 78%, according to Environment and Climate Change Canada.
Markham’s housing stock shapes HVAC comfort requirements across neighbourhoods. Heritage homes in Unionville contain aging ductwork sized for older, less efficient equipment. Newer builds in Cornell and Wismer Commons feature tighter building envelopes that demand properly calculated system sizing to prevent short-cycling and humidity control problems. Dual heating and cooling capability is standard for every Markham residence.
In Markham’s climate, the heating season stretches from October through April and cooling demand peaks between June and August. Furnace systems and air conditioning systems face distinct seasonal threats.
Top efficiency upgrades ranked by return on investment for Markham homeowners:
Smile HVAC installs, repairs, and maintains both tank and tankless water heaters across Markham. Tankless units heat water on demand and eliminate standby losses. Tank models store 40 to 75 gallons for homes with consistent high-volume demand.
Indoor air quality solutions from Smile HVAC include HEPA filtration, humidifier installation, and HRV (Heat Recovery Ventilator) servicing. These solutions reduce airborne allergens and control humidity within the recommended 30% to 50% range.
Markham’s commercial corridor includes technology offices along Highway 7, retail centres such as Pacific Mall and CF Markville, and industrial properties near Highway 404. Commercial HVAC systems serve higher occupancy loads and operate under Ontario building code ventilation standards.
Smile HVAC partners with Lennox, Carrier, Daikin, and Trane for commercial-grade equipment and provides the following services across Markham:
Smile HVAC is available 24/7 at 437-777-4555. Markham homeowners can also book online and receive 10% off the service call. The Smile HVAC office operates from 8540 Keele Street Unit 41, Vaughan, ON, L4K 3P4, serving all Markham neighbourhoods.
Smile HVAC covers furnace repair and installation, air conditioner service, heat pump installation, water heater repair (tank and tankless), ductless AC, HRV systems, humidifiers, and indoor air quality solutions. The Lennox ML series at 14 SEER is the recommended standard air conditioner for Canadian homeowners. Residential and commercial properties across Markham are served.
Failed igniters, cracked heat exchangers, dirty flame sensors, and blocked flue pipes are the most frequent furnace repairs in Markham. A furnace cycling without reaching temperature, producing banging or rattling noises, or showing a yellow burner flame requires inspection by a TSSA-licensed gas technician.
Warm air from vents, weak airflow, unusual grinding or clicking sounds, and ice forming on refrigerant lines all indicate air conditioner problems. Excess condensate pooling around the indoor unit or a musty odour from supply vents signals a drainage or mould issue requiring professional diagnosis.
Annual HVAC maintenance by TSSA-certified technicians extends equipment lifespan, sustains rated energy efficiency, and preserves manufacturer warranty coverage. A neglected air conditioner in Markham’s humid climate loses cooling capacity each season, raising electricity costs and increasing breakdown risk during peak summer demand.
Smile HVAC recommends bi-annual servicing: a fall tune-up for furnaces before October and a spring tune-up for air conditioners before June. Markham’s seven-month heating season and high summer humidity place above-average wear on both systems. The Smile Protection Plan starts at $14.99/month and includes repair coverage and free emergency calls. Maintenance Plan is a separate plan at $9.99/month covering scheduled tune-ups and priority service. Homeowners who bundle both plans pay $21/month.
Check thermostat settings, replace the air filter, and confirm the gas supply valve is open. If the furnace still does not start, call Smile HVAC at 437-777-4555 for 24/7 emergency service.
Smile HVAC is authorized and licensed to service over 30 brands, so if you own any HVAC equipment from these brands, you don’t need to call two companies. Smile HVAC will help you solve all HVAC-related issues and will assist with repairs and installations. We work with all brands including Lennox, Goodman, Amana, Keeprite, Bryant, Daikin, Carrier, York, Trane, Comfortmaker, Payne, Tempstar, Rheem, Ruud, and Mitsubishi Electric
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