# Emergency AC Repair Toronto | 24/7, 2-Hour Response > AC quit in a heat wave? Emergency AC repair Toronto, 24/7. TSSA-certified techs, parts on every van, $150 diagnostic. Call 647-254-4113. URL: https://besthvactoronto.ca/emergency-air-conditioning-repair/ ![Best HVAC Toronto technician diagnosing a failed central air conditioner during a Toronto summer heat wave](/images/hero/tssa-certified-technician-diagnosing-a-failed-air-.webp) # 24/7 Emergency AC Repair in Toronto, Same-Day Across the GTA Last updated: October 26, 2026 Best HVAC Toronto [/ →](/) has over 20+ years of Greater Toronto Area experience specialising in emergency air conditioning repair across Toronto and the wider GTA. Emergency air conditioning repair across Toronto and the GTA with a typical two-hour emergency response, 24/7. Our TSSA-certified crew diagnoses and repairs central AC systems and ductless mini-splits from Lennox, Carrier, Trane, Bosch, Mitsubishi, and Daikin, covering capacitor failures, contactor burnout, refrigerant leaks with electronic leak detection, frozen evaporator coils, blower motor faults, thermostat wiring issues, and control board diagnostics. Refrigerant transitions between R-410A and R-454B handled properly with EPA Section 608 certification. Common failure parts stocked on every van: run and start capacitors, contactors, TXV valves, thermostats, and blower motor modules, so most emergency repairs are completed same-visit. The diagnostic is $150 and applies to the repair, and most emergency repairs land between $300 and $700 CAD including parts. Every repair quoted in writing before work begins. Priority dispatch during heat waves and cold snaps when GTA call volume spikes. 24/7 live answering, not voicemail. Most emergency repairs land between $300 and $700 CAD including parts. Weekend and after-hours calls are slightly higher, disclosed in writing before work starts. Same-day weekday capacity. 24/7 dispatch for gas emergencies and Enbridge Red Tags. - check\_circle TSSA G1/G2 certified - check\_circle 20+ years experience - check\_circle Manufacturer-Authorized Dealer call Call 647-254-4113 [tel:+16472544113 →](tel:+16472544113) View pricing [#pricing →](#pricing) payments **From $150**. diagnostic, applied to the repair - star star star star star 4.9 (150+ reviews) - verified TSSA G1/G2 Certified & $2M Insured - bolt 2-Hour Emergency Response - workspace\_premium Manufacturer-Authorized Dealer Common problems ## Sound familiar? ac\_unit ### AC stopped cooling during a heat wave A failed air conditioner at 33 degrees cannot wait. Our TSSA-certified team dispatches across Toronto and the GTA 24 hours a day, targeting same-day arrival so your home cools before the night settles in. severe\_cold ### Ice building up on the coil or copper line Usually low refrigerant or restricted airflow, not a simple top-up fix. We find the actual cause and repair it so the same problem does not return next summer. payments ### Worried about the cost on a weekend or overnight call We tell you the exact CAD price before any work begins. Weekend and after-hours rates are slightly higher, but you see the number in writing before a tool is picked up. ## When your air conditioner fails during a Toronto heat wave, every hour counts Best HVAC Toronto is a full-service HVAC contractor providing 24/7 emergency AC repair across Toronto and the GTA, with a typical two-hour emergency response and TSSA-certified technicians on every call. Toronto summers bring sustained stretches above 30 degrees Celsius, often with humidex readings near 40, and a failed air conditioner during an Environment Canada heat warning creates genuine health risk for households with young children, older residents, or anyone with a respiratory condition. Our team dispatches 24 hours a day because no-cooling calls in a heat wave cannot be booked for next Tuesday. Emergency AC repair covers the full range of failures that take a system down mid-summer: a condenser that runs but does not cool, a unit that shuts off within minutes of starting, a frozen coil that restricts airflow through the house, and a system that will not start at all. Each symptom points to a specific component, and diagnosing it correctly on the first visit is the difference between cooling restored that evening and a callback for a part. Best HVAC Toronto’s licensed technicians arrive with the most commonly failed AC parts on every service van. Run capacitors, contactors, condensate pumps, and fan motor components are stocked for same-visit repairs. As a manufacturer-authorized dealer for Lennox, Carrier, Trane, Bosch, and York, the crew works on these central air systems every week, and ductless mini-split emergencies, including Mitsubishi and Daikin units, are covered under the same dispatch, whether the system cools a detached home, a semi, or a stacked townhouse. ![TSSA-certified technician running refrigerant diagnostics on a ductless mini-split at a North York home in a heat wave](/images/maps/tssa-certified-technician-running-refrigerant-diag.webp) ## Why did my air conditioner stop cooling? ### The capacitor fails and the condenser cannot start A failed run capacitor is the single most common emergency AC call in a Toronto summer. The compressor or fan motor draws more current than usual trying to start, hums, and shuts off on over-temperature protection. Replacing the capacitor is a quick repair that most calls can resolve in under an hour. Leaving it in that state risks burning out the compressor, which is a far more expensive problem. ### Refrigerant has leaked and the system cannot cool Refrigerant does not get consumed, so if the charge is low there is a leak somewhere in the system. A partially depleted system blows cool but not cold, and the house never quite reaches the thermostat setting no matter how long it runs. Full depletion causes the evaporator coil to ice over and restricts airflow entirely. The correct repair is to find and fix the leak, recover the remaining refrigerant, repair the breach, pull a vacuum, and recharge to the manufacturer’s specification. Simply topping up without finding the leak is a short-term fix that will repeat next season. ### The evaporator coil has frozen and blocked airflow A frozen coil produces the same symptom as refrigerant loss but from a different cause: restricted airflow, usually a badly clogged filter, dirty coil, or blocked return air path. The system blows warm or barely cool air despite running. The correct first step is to turn the system off and let it thaw before diagnosis, otherwise the blockage masks the underlying cause. Check the filter before calling us: if it is visibly packed solid, replace it and restart. If the problem continues, call 647-254-4113. ### The contactor is stuck or burnt The contactor is the electrical switch that connects the compressor and fan motor to mains power when the thermostat calls for cooling. A stuck-open contactor means the outdoor unit will not start at all even when the thermostat is calling. A stuck-closed contactor means the outdoor unit runs continuously regardless of the thermostat, which eventually damages the compressor. Both are carried on the van. ### Ductless mini-split emergency failures Mini-splits fail differently from central systems. Common emergency scenarios include refrigerant leaks at the flare connections, error codes from communication faults between the indoor and outdoor units, blocked drainage causing the indoor unit to shut down on overflow protection, and failed fan bearings in the indoor cassette. Our team diagnoses both split systems and central ducted equipment on the same dispatch. ## How much does emergency AC repair cost in Toronto? The diagnostic is $150 and applies to the repair if you proceed. Most emergency repairs land between $300 and $700 CAD including parts. A run capacitor or contactor replacement sits at the lower end of that range. A refrigerant leak repair with detection, repair, and recharge runs higher depending on where the leak is and how much refrigerant the system holds. Weekend and after-hours calls carry a slightly higher rate, and you will see the exact number in writing before any work begins. Pricing is in CAD (2026 rates) and confirmed in writing before work starts. If the diagnosis shows the repair cost approaches the value of a newer system, Best HVAC Toronto technicians will show you both numbers and let you decide without pressure. For reference, a new central AC installation runs $4,000 to $8,000 depending on tonnage and SEER2 rating. For a typical 2,000 sq ft Toronto home, the tonnage comes from a load calculation of that specific house rather than a rule of thumb, so the replacement quote reflects how your home actually gains heat. ## R-410A and R-454B: what the refrigerant transition means for your system As of 2026, new air conditioning equipment has moved to lower global warming potential refrigerants, principally R-454B and R-32. If your current system uses R-410A, it can still be serviced and refrigerant remains available in Ontario, but supply has tightened and the cost per kilogram has risen. If your system is over 12 years old and requires a significant refrigerant repair, our team will show you the repair cost alongside a replacement estimate so you can weigh both options honestly. A replacement is also a home efficiency upgrade: a higher-SEER2 central air system, or a cold-climate heat pump [/heat-pump-installation/ →](/heat-pump-installation/) that cools in summer and heats through winter and is eligible for rebates of up to $6,500. There is no pressure either way. ## Which Toronto and GTA neighbourhoods do we cover? Searching for an emergency AC technician near you? Our same-day response covers all of Toronto including North York, Etobicoke, Scarborough, East York, and York. Beyond the city, the same dispatch extends to Mississauga, Brampton, Vaughan, Woodbridge, Thornhill, Markham, Richmond Hill, Oakville, Burlington, and the Durham region including Ajax, Pickering, Whitby, and Oshawa. Toronto’s housing stock creates some specific heat-wave challenges. Detached homes in Scarborough and North York built in the 1970s and 1980s often have original ductwork with undersized returns that restrict airflow and accelerate coil freezing. Condos and stacked townhomes in Etobicoke and downtown frequently rely on through-wall fan coil units or connections to central building plant, and the failure modes differ from single-family central systems. Older semi-detached and row houses in Leslieville, Riverdale, and The Annex often run central air through ductwork originally sized for a furnace, which leaves the upper floor hottest when the system struggles. Our crew brings over 20 years of combined Ontario HVAC experience to all of these building types. For restaurants, offices, and retail units running rooftop equipment, our commercial HVAC [/commercial-hvac/ →](/commercial-hvac/) team handles no-cooling calls as well. If your central AC system [/air-conditioning-installation-repair/ →](/air-conditioning-installation-repair/) has reached the end of its serviceable life and the emergency repair cost does not make sense, our team can quote a replacement during the same visit. If the emergency is related to a gas line issue or an Enbridge red tag, our team also handles Red Tag compliance and gas restoration [/enbridge-red-tag-compliance/ →](/enbridge-red-tag-compliance/) as part of a single visit where possible. ## AC down right now? Call 647-254-4113, day or night A failed air conditioner in a Toronto heat wave is a genuine emergency. Call 647-254-4113 any time, day or night, and the TSSA-certified Best HVAC Toronto team will dispatch same-day across Toronto and the Greater Toronto Area, with a typical two-hour emergency response. Transparent pricing ## How much does emergency ac cost in Toronto? Most emergency repairs land between $300 and $700 CAD including parts. Weekend and after-hours calls are slightly higher, disclosed in writing before work starts. receipt\_long Written quote before any work begins. No hidden fees. ### Diagnostic Applied to the repair if you proceed Starting from $ 150 diagnostic, applied to the repair - check Full no-cooling diagnosis - check Capacitor, contactor, refrigerant, and coil checks - check 24/7 during heat waves - check Same-day dispatch across Toronto and the GTA Get a quote [tel:+16472544113 →](tel:+16472544113) MOST COMMON ### Diagnostic + common repair Most emergency calls resolve here Starting from $ 400 diagnostic, applied to the repair - check Diagnostic fee included - check Run capacitor or contactor replacement - check Common parts stocked on every van - check 24/7 dispatch, same-day GTA response Get a quote [tel:+16472544113 →](tel:+16472544113) ### Diagnostic + refrigerant repair Leak detection, repair, and recharge Starting from $ 600 diagnostic, applied to the repair - check Diagnostic fee included - check Refrigerant leak detection and repair - check R-410A or R-454B recharge to specification - check Written quote in CAD before work starts Get a quote [tel:+16472544113 →](tel:+16472544113) Prices are guide ranges for Toronto and the GTA. Final pricing depends on your equipment, access, and site conditions, and we confirm it in writing before starting. Request a free estimate [/contact/ →](/contact/) or call 647-254-4113 [tel:+16472544113 →](tel:+16472544113) . savings Financing available on approved credit, plus lease-to-own with zero down on qualifying installs. Why us ## Why choose Best HVAC Toronto for emergency ac? bolt ### Same-day emergency response, 24/7 Our TSSA-certified team holds a typical two-hour emergency response across Toronto and the GTA, 24 hours a day through the summer. No-cooling calls during heat waves are never told to wait until next week. build ### Parts on the van, fix on the first visit Run capacitors, contactors, condensate pumps, and common fan motor components are stocked on every service vehicle, so most emergency calls are resolved in a single visit rather than requiring a part order. receipt\_long ### Transparent pricing in writing The diagnostic is $150 and applies to the repair. Emergency and after-hours rates are slightly higher, but you will see the number in writing before work begins, so the invoice never surprises you. workspace\_premium ### TSSA G1/G2 certified on every call Every technician carries TSSA G1 or G2 certification, WSIB coverage, and $2M general liability insurance. Refrigerant work in Ontario requires proper certification, and our team brings it on every dispatch. shield ### Manufacturer registration filed on your behalf Replacement parts installed during an emergency call carry the same manufacturer parts coverage as parts installed on a planned installation. Parts and workmanship are covered, giving you confidence the repair will hold. ## How Best HVAC Toronto compares | Feature | Typical provider | Best HVAC Toronto | | --- | --- | --- | | Heat wave response | Next available slot, sometimes days out | Typical two-hour emergency response, 24/7 | | Who attends the call | On-call junior technician | TSSA G1/G2 certified technician | | Insurance and coverage | Not always disclosed | WSIB coverage and $2M general liability, HRAI member | | Parts availability | Diagnose now, return with the part | Common parts stocked on every van | | Quote before work | Verbal estimate on site | Written fixed price in CAD before we start | | Warranty handling | Homeowner registers the equipment | Manufacturer registration filed by us | How it works ## How does our emergency ac service work? 1. 1call ### Call us, any time of day or night Call 647-254-4113 and tell us what the AC is doing. No-cooling calls during a heat wave receive priority dispatch, and our team targets same-day arrival across Toronto and the GTA including weekends. 2. 2search ### Full diagnosis on arrival Our licensed technicians check the run capacitor, contactor, refrigerant pressures, superheat and subcooling, compressor health, coil condition, and condensate drain before recommending anything. 3. 3receipt\_long ### Written quote before any work You receive the diagnosis and a fixed written price in CAD before any repair begins. Weekend and after-hours rates are disclosed up front. No surprises when the invoice arrives. 4. 4verified ### Repair and restore cooling Most emergency repairs are completed on the first visit because common AC parts are stocked on every van. We verify temperatures, refrigerant charge, and airflow before leaving. ## Not sure what your emergency ac situation needs? Get a straight answer and a written price, with the numbers to back it up. No pressure, no scare tactics. call 647-254-4113 [tel:+16472544113 →](tel:+16472544113) Book Online [/contact/ →](/contact/) Our work ## Recent emergency ac projects Click any image to enlarge. Reviews ## What customers say about our emergency ac work starstarstarstarstar4.9 out of 5 from 150+ customer reviews star star star star star > Our AC died during the July heat wave. They came out same day, diagnosed a refrigerant issue, and had us cool again fast. Honest about repair versus replace, and they didn't push us into a new system. SSandra L.Scarborough star star star star star > AC replacement done in a day with no mess left behind. They walked me through the SEER2 difference before I picked a unit. AAndrea Q.Amberlea, Pickering star star star star star > Replaced our 18-year-old furnace with a high-efficiency unit and walked us through the Ontario rebates. Written quote up front, no hidden fees, and the crew left the mechanical room cleaner than they found it. MMichael T.Etobicoke FAQ ## Emergency AC questions, answered ### How quickly can you respond to an emergency AC call in Toronto? expand\_more Typical emergency response is within two hours across Toronto and the GTA, 24 hours a day, with same-day arrival on virtually every no-cooling call. During a heat wave, no-cooling calls receive priority dispatch. Call 647-254-4113 any time and our team will confirm the arrival window before hanging up. ### What does an emergency AC diagnostic cost? expand\_more The diagnostic is $150 and is applied to the repair if you proceed. Most emergency AC repairs land between $300 and $700 CAD including parts. Weekend and after-hours calls are slightly higher, and we disclose the exact rate in writing before starting any work. ### What are the most common reasons an air conditioner stops cooling? expand\_more The most common causes are a failed run capacitor, a burnt or stuck contactor, a refrigerant leak causing low charge, a frozen evaporator coil from restricted airflow, and a failing compressor. A compressor that hums but will not start is often a capacitor problem caught early; a compressor with a seized motor or failed windings is the most expensive failure and usually triggers a repair-versus-replace conversation. Our technicians check all of these on every emergency call. ### Do you carry AC parts on the van for same-day repairs? expand\_more Yes. Run capacitors, contactors, condensate pumps, and common fan motor components are stocked on every service vehicle. That is why most emergency AC calls are resolved on the first visit rather than requiring a second appointment. ### Do you repair ductless mini-splits as well as central AC? expand\_more Yes. Our emergency service covers both central air conditioning systems and ductless mini-split units. Common mini-split failure points such as refrigerant leaks, communication errors, and drainage blockages are all within scope. ### What is happening with R-410A and R-454B refrigerant? expand\_more As of 2026, new equipment has moved to lower global warming potential refrigerants such as R-454B and R-32. Existing R-410A systems can still be serviced and refrigerant remains available, but supply has tightened and costs are rising. If your R-410A system is over 12 years old and needs a significant refrigerant repair, compare the repair quote against a new R-454B central AC or a cold-climate heat pump, which qualifies for rebates of up to $6,500. ### Are your weekend and overnight rates higher? expand\_more Yes, slightly. Weekend and after-hours calls carry a higher rate than weekday daytime service. We tell you the exact rate before work begins, so there is no surprise on the invoice. The $150 diagnostic applies to the repair regardless of when you call. ### Can I fix my AC at home before calling a technician? expand\_more A few safe checks are worth doing: confirm the thermostat is set to cool and below room temperature, reset a tripped breaker once, replace a packed filter, clear debris from around the outdoor unit, and if the coil or copper line is iced, switch the system off for a few hours to thaw. Capacitors, contactors, and refrigerant work involve high voltage and pressurized refrigerant and should be left to a licensed technician. If you smell burning or hear unusual sounds, switch the system off at the breaker and mention it when you call so we can flag it as a safety issue. ### Are your AC technicians licensed and insured? expand\_more Yes. Every technician holds TSSA G1 or G2 gas certification and works under WSIB coverage and a $2 million general liability policy. The company is an HRAI member, and the crew carries EPA 608 refrigerant certification and over 20 years of combined Ontario HVAC experience. ### Which air conditioner brands do you repair on emergency calls? expand\_more We are a manufacturer-authorized dealer for Lennox, Carrier, Trane, Bosch, Napoleon, and York, and we repair central air systems from all of them. Ductless mini-splits from Mitsubishi and Daikin are also covered on emergency calls. ## Related services ac\_unitAir Conditioning Installation & RepairCentral AC sized to your home, plus 24/7 emergency repair through Toronto heat waves. [/air-conditioning-installation-repair/ →](/air-conditioning-installation-repair/) mode\_fanDuctless Mini-Split InstallationPer-zone heating and cooling for spaces without ductwork, installed cleanly and quietly. [/ductless-mini-split-installation/ →](/ductless-mini-split-installation/) gpp\_maybeEnbridge Red Tag Emergency ComplianceSame-day red tag inspection, repair, and re-certification so Enbridge can turn your gas back on. [/enbridge-red-tag-compliance/ →](/enbridge-red-tag-compliance/) ![](/images/hero/hvac-technician-in-plain-grey-uniform-kneeling-bes.webp) 24/7 for gas emergencies, red tags, no-heat and no-AC ## Ready to book emergency ac? Emergency air conditioning repair across Toronto and the GTA with a typical two-hour emergency response, 24/7. Our TSSA-certified crew diagnoses and repairs central AC systems and ductless mini-splits from Lennox, Carrier, Trane, Bosch, Mitsubishi, and Daikin, covering capacitor failures, contactor burnout, refrigerant leaks with electronic leak detection, frozen evaporator coils, blower motor faults, thermostat wiring issues, and control board diagnostics. Refrigerant transitions between R-410A and R-454B handled properly with EPA Section 608 certification. Common failure parts stocked on every van: run and start capacitors, contactors, TXV valves, thermostats, and blower motor modules, so most emergency repairs are completed same-visit. The diagnostic is $150 and applies to the repair, and most emergency repairs land between $300 and $700 CAD including parts. Every repair quoted in writing before work begins. Priority dispatch during heat waves and cold snaps when GTA call volume spikes. 24/7 live answering, not voicemail. Written quotes before work begins, and manufacturer parts coverage registered on your behalf. call Call 647-254-4113 [tel:+16472544113 →](tel:+16472544113) Get a Free Estimate [/contact/ →](/contact/) - check\_circle Manufacturer registration filed on your behalf - check\_circle Written quotes before work starts - check\_circle TSSA G1/G2 certified, WSIB covered Cities we serve ## Emergency Air Conditioning Repair Across the GTA Same-day emergency AC repair during summer heat waves, with capacitor, contactor, refrigerant leak, and frozen coil diagnostics for central AC and ductless mini-splits. ### Emergency Air Conditioning Repair in North York City of Toronto [Emergency Air Conditioning Repair in North York →](/emergency-air-conditioning-repair/north-york/) ### Emergency Air Conditioning Repair in Etobicoke City of Toronto [Emergency Air Conditioning Repair in Etobicoke →](/emergency-air-conditioning-repair/etobicoke/) ### Emergency Air Conditioning Repair in Scarborough City of Toronto [Emergency Air Conditioning Repair in Scarborough →](/emergency-air-conditioning-repair/scarborough/) ### Emergency Air Conditioning Repair in Vaughan City of Vaughan [Emergency Air Conditioning Repair in Vaughan →](/emergency-air-conditioning-repair/vaughan/) ### Emergency Air Conditioning Repair in Markham City of Markham [Emergency Air Conditioning Repair in Markham →](/emergency-air-conditioning-repair/markham/) ### Emergency Air Conditioning Repair in Mississauga Peel Region [Emergency Air Conditioning Repair in Mississauga →](/emergency-air-conditioning-repair/mississauga/) ### Emergency Air Conditioning Repair in Brampton Peel Region [Emergency Air Conditioning Repair in Brampton →](/emergency-air-conditioning-repair/brampton/) ### Emergency Air Conditioning Repair in Richmond Hill City of Richmond Hill [Emergency Air Conditioning Repair in Richmond Hill →](/emergency-air-conditioning-repair/richmond-hill/) ### Emergency Air Conditioning Repair in East York City of Toronto [Emergency Air Conditioning Repair in East York →](/emergency-air-conditioning-repair/east-york/) ### Emergency Air Conditioning Repair in Oakville Halton Region [Emergency Air Conditioning Repair in Oakville →](/emergency-air-conditioning-repair/oakville/) ### Emergency Air Conditioning Repair in Burlington Halton Region [Emergency Air Conditioning Repair in Burlington →](/emergency-air-conditioning-repair/burlington/) ### Emergency Air Conditioning Repair in Ajax Town of Ajax [Emergency Air Conditioning Repair in Ajax →](/emergency-air-conditioning-repair/ajax/)