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CM Expert

Fast Air Conditioner Repair in Ajax

Our expert AC technicians can help! We offer prompt and reliable repairs to get your air conditioner running smoothly again, so you can stay comfortable all summer long.


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Same-Day Service

Our technicians are fully committed to arriving at your home quickly and resolving any problems efficiently.

Advanced Diagnostics

We don't just fix the problem, we prevent it from coming back. Our experts use best tools to pinpoint the exact cause.

Service Warranty

We back our repairs with a 1-year warranty, so you can be confident your AC will keep you cool all season long.

Cost Upfront

We believe in transparency. That's why you'll receive a clear and detailed quote outlining the repair cost before any work begins.

Prompt Response & Expert Solutions

Our skilled technicians are available today to diagnose and fix your AC problems quickly and efficiently.

HVAC Champions

Our technicians aren't just skilled, they're champions of HVAC services

Why Choose CM Expert FOR HVAC Services in Ajax


Positive reviews on:
Experienced Technicians

Our team has worked on thousands of AC systems, everything from simple maintenance to difficult diagnostic repairs. This extensive hands-on experience means quick identification of problems and swift resolution

Fast and Reliable Service:

Being without an air conditioner on a hot summer day is uncomfortable, so you need repairs you can depend on – fast and reliable service. At CM Expert, we understand the importance of a quick response.

Affordable Rates:

Here at CM Expert, we believe quality AC repair and maintenance should be affordable for homeowners and businesses alike. Our technicians have the expertise to handle even the most complex equipment issues.


What Our Clients Are Saying about us

Our HVAC Company Reviews

Certified Mechanical

4.5Out of 5 stars

Overall rating out of 151 Google reviews

Amazing! Professional and quick service!

Fleming Viegas
3 weeks ago

a great job done on time

Brian Edwards
3 weeks ago

Great service and helpful technician.

David Duncan
3 weeks ago

Very reliable

Raul was very personable and professional. He called in advance to confirm and came back as promised the next day to fix our dryer after his initial diagnosis.

Jason Chan
2 months ago

Price was the highest of all contractors I asked for a quote from. Not at all competitive with other companies for the same product and service. Definitely recommend getting multiple quotes from different contractors before selecting a company. Edit: to answer below, the reason for one star is because the job was not to repair something. It was to replace. All the other contractors were quoting for the same replacement. The actual price will not be lower than your quote will it? Price gouging is not a good business model

Opulent Kitchen
2 months ago

Technician was very helpful and gave all the options to best help me

Mark McDonald
2 months ago

Had a great experience with the technician that came to my laundromat. Very hard working and professional and went out of his way to deliver amazing service for me. Ronaldo is great. Thanks guys. Will definitely use them again.

Sol Omon
2 years ago

Our washing machine was rattling and making a lot of noice so we did a google search for repair service. We found out during this search that Certified Mechanical has the designation of Google Guarantee which means (Businesses with the 'Google guaranteed' badge are screened, and are guaranteed to get the job done right or your money back with a lifetime cap of $2,000. ) Anthony the owner of the establishment sent a repair technician and the charged us for $99 to see visit out place and diagnose the problem. The repair was going to be costly so we decided to purchase a new washer and dryer. We called Anthony to provide us with quotes of 3 brands and see which one was in stock and we decided to proceed with the brand that was available and in stock. (This was not our 1st choice but we had did not want to wait 2 weeks plus) We understand the supply chain issues and low inventory and wanted the delivery and install to be done within 3 days. The only thing that I would say is that Certified Mechanical had to outsource the installation of the machines to another trade but we are happy with Certified Mechanical that the trades assigned to install the machines did a good job. Thank you Google for screening the vendors as it sure helps in make a decision and thank you for the $2000 guarantee.

Amory Erheim
3 years ago

I own a triplex home in Toronto that I rent. Anthony visits the property annually to inspect the system. My experience he is honest, don’t pull your leg or wallet, he is professional & don’t waste your time. Proficient & knows his trade.

Emilio Farouse
9 months ago

Ronnie's definitely a magician, in the best way possible. I work in the property management field and had an issue with a high end commercial dishwasher. Ronnie was on time, professional and informative. He was able to not only fix our machine but leave it functioning better than it was pre breakdown. Keep guys like this around, your sanity and your wallet will thank you.

Ella Lightstone
5 months ago

Our Mechanic showed up on time, patiently explained the issues. fixed it quickly, and even helped move things back into place. Kind and thorough, went above and beyond!

Anita Kumari
8 months ago

Mr Omari went over and above helping me fix my fridge. He was helpful and provided amazing guidance and advice for an easy fix on my fridge. It's hard finding honest and knowledgeable repair people. Thank you again!

Leila Aquino
a year ago

I called Certified Mechanical and they sent Anthony to fix our broken furnace. It was too cold and we can't sleep. Thanks to Certified Mechanical, they repair our furnace right away. Anthony is really knowledgeable, and reliable. Sincere and explains the necessary work. Highly recommended!!!!

Tana Turner
2 months ago

Thank you for your excellent service as always. Ronnie is so knowledgeable and good to work with. Always a pleasure!

2 years ago

Absolutely happy with the service that was provided. It was professional, quick, and honest. Anthony was able to come and access the problem with my fridge and was able to fix it within 15 min. Whoever requires any kind of repair, Anthony and his company is the company you need to contact. Unfortunately I previously had hired another company and they simply scammed me and didn't fix anything. Disappointed that I didn't find Anthony sooner. I would give more than 5 stars if I could.

Michelle Jamieson
6 months ago

Responsive, professional service. Anthony did a great job on our beverage fridge repair.

Melanie Minshull
2 years ago

Raul was Amazing!! He was able to identify the problem easily and then let me know the plan to correct. He was on time and communicated everything clearly. The repair was completed and saved me replacing the dryer!!! I will definitely be calling back if I ever need help again.

Our Comprehensive AC Repair Services

Finding a leaky air conditioner or one that isn’t keeping your home cool during the summer is terrible, especially when you don’t have time to search for an AC repair service near you. At CM Experts, we understand that homeowners in Ajax want straightforward solutions to their AC repair needs without wasting time. 

As a specialized team of experienced technicians, we are committed to providing excellent appliance repair services that solve AC problems quickly. Our comprehensive services include repairs, maintenance and installation services to keep your air conditioner performing efficiently.

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We Will Deal With All Your AC Issues

Our experts can fix any air conditioner problems


Ajax Reliable Air Conditioner Repair

When hot summer weather arrives, you depend on your air conditioning system to keep your home cool and comfortable. Unfortunately, AC units can develop problems that need professional fixing. At CM Experts, we are committed to handling all of your air conditioning repair needs quickly and efficiently. As an AC repair company you can rely on, we provide the following comprehensive services to get your system up and running again

air conditioner repair in Ajax
Ajax and searching for “AC Repairs near me”?
Our service vehicles are strategically stationed to achieve rapid response all across the city to residential, commercial and industrial locations. This ensures even those in outlying areas have ready access to skilled technicians.
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We Cover all of the Greater Toronto Area

Emergency AC Repair

When an issue arises with your home air conditioning unit and you need repairs right away, CM Experts is here to help. We understand the importance of a functioning AC system during hot summer weather. That’s why we offer emergency AC repair services in Ajax to resolve any urgent AC problems. Whether your AC suddenly stops cooling or you discover a refrigerant leak, our technicians have the expertise to arrive the same day and diagnose the issue.

AC Unit Repairs & Maintenance

Regular maintenance is key to keeping your air conditioning system operating at peak performance throughout the summer season. The experienced technicians at CM Experts offer thorough AC unit repairs and maintenance services to prevent small issues from becoming costly breakdowns. Our professional maintenance program can extend the life of your equipment and improve efficiency.

AC Compressor Repair Services

The AC compressor is the heart of your air conditioning system, circulating refrigerant to remove heat from the air. When a compressor fails, your entire cooling system will stop working properly until repaired. As a leading provider of HVAC services in Ajax, our technicians are fully equipped to handle all types of AC compressor repairs. We can diagnose compressor issues quickly and replace failed compressors with high-quality, energy-efficient models.

AC repair in Ajax

Fixing refrigerant leaks

Over time, refrigerant leaks can develop in an air conditioner system, causing the unit to run inefficiently and place increased strain on its compressor. A leak must be repaired quickly to prevent costly damage and refrigerant loss. Our professional AC technicians in Ajax are certified to precisely locate and repair all types of refrigerant leaks. We have the proper leak sealer equipment and expertise to fix the problem safely and effectively.

We will repair all your AC Issues

When heat waves arrive, you need fast solutions to AC problems so your home remains cool and comfortable. At CM Experts, we strive to deliver the responsive, reliable maintenance and repair services that every customer deserves. Our technicians are fully equipped and trained to diagnose and handle any issues with your air conditioning system. 

Whether you require annual maintenance, emergency repairs or a full system upgrade, we’re committed to serving all your HVAC needs. With over 15 years of industry experience resolving AC issues quickly, you can count on our team for consistently fast service that keeps your equipment performing at its best. Rely on CM Experts – we’ll get your air conditioner working efficiently once again.

Weak airflow

Nothing is more frustrating than an air conditioner that no longer feels cool throughout the home. Weak airflow from vents could be a sign of problems with your system that require fast repair. Common unit issues like dirty coils, closed dampers or restricted ducts can severely inhibit proper airflow. The specialist technicians at CM Experts have extensive experience identifying and solving reduced airflow issues of all types. 

We’ll arrive prepared with the tools and expertise needed to determine the root cause through inspection and diagnostics. Customers appreciate that we swiftly resolve the problem, whether it’s a simple filter change or more involved cleaning or adjustments. You’ll feel the difference immediately as your AC unit functions at full forced cooling again. Rely on us to address weak airflow concerns and restore powerful ventilation throughout your living spaces.

Electrical Problems

The electrical components of an air conditioning system are vital to proper operation. But over time, issues such as loose wires or defective components can arise, rendering your HVAC repair in need of our skilled services. Common electrical faults we regularly repair include malfunctioning contactors, blown fuses, faulty capacitors and more. Rather than troubleshoot electrical problems yourself, rely on the diagnostics expertise of CM Experts. 

As Ajax’s most trusted technicians, we have the specialized training and tools required to quickly identify even challenging electrical faults. From optimizing 24V and 120V circuits to replacing worn wiring, our team ensures your entire AC system is up and running safely. You’ll appreciate regaining a smoothly functioning HVAC system sooner rather than later thanks to our prompt electrical repairs. Trust the professionals at CM Experts to resolve any electrical problems for a fully revived cooling system.

Thermostat Issues

The thermostat acts as the control center for regulating your home or building’s temperature. However, thermostats are susceptible to developing faulty operation over time like any component. A thermostat malfunctioning could keep your AC system from engaging despite settings. At CM Experts, we have vast experience solving quality thermostat issues with our licensed technicians in Ajax. From replacing worn-out units to addressing control board problems, we can quickly determine the root of thermostat troubles. 

Customers appreciate our expertise in installations too – we expertly setup new programmable or smart thermostats. Don’t remain stuck in uncomfortable conditions – rely on our professionals to service faulty thermostats preventing your HVAC system from maintaining the temperature you select. We’ll have your thermostat, and your cooling, working properly again fast.

Clogged drain lines

When your air conditioner stops properly removing condensation from cooling, it can affect the unit’s efficiency and functionality. One common culprit is clogged drain lines preventing drainage outside. Here at CM Experts, drain line clearing is a specialty service of our highly experienced AC Repair in Ajax team. Our technicians are equipped with drain snake devices and expertise to unblock even severely impacted drains. 

We investigated line routes, identified blockages like mud dauber nests or plant debris, and extracted full drainage restoration. Customers appreciate how quickly their units are up and running at full capacity again post-repair. If condensation disposal is concerned, leave complicated drain cleaning to our licensed professionals. We bring drained lines and optimized cooling system performance back fast through our skilled services.

How much does it cost to repair an air conditioner in Ajax?

There is no single answer to the question of pricing as the costs for AC repairs can vary depending on multiple factors. At CM Experts, our goal is transparency so customers understand what to expect for any needed services on their unit.

  1. Repair expenses are influenced primarily by the nature of the issue – a small diagnostics fee versus more extensive replacement parts. Diagnosis is required first to accurately determine the repair scope.
  2. Brand, age and size of the system also impact costs as they affect available replacement components and technician labor time.
  3. Our licensed professionals will provide a free estimate once the problem is identified. As an established company serving the Ajax area, we strive for fair rates that balance quality work with affordability for homeowners and businesses.
  4. Payment plans are available for more substantial repairs or installations to spread expenses over time. Seasonal maintenance agreements also offer budget protection with lower total yearly costs.

Trust CM Expert to assess your unit, explain all options thoroughly and develop the most cost-effective solution for restoring reliable cooling. Contact us today to discuss your AC repair needs.


There are a few common reasons why your air conditioner may be running but not cooling effectively:


  • Dirty or clogged air filter: A dirty air filter can restrict airflow and reduce cooling efficiency. We recommend checking and cleaning or replacing your filter monthly during peak cooling season.
  • Low refrigerant: Over time, refrigerant levels naturally decrease which affects the AC’s ability to cool. If your unit is more than 10 years old, it may need to be recharged by a licensed technician.
  • Faulty thermostat: Thermostats can fail in a way that tricks the AC into running constantly without actually cooling. Our technicians at CM Expert are trained to diagnose thermostat issues.
  • Bad capacitor or fan motor: These internal components help power air circulation. If either fails, air won’t circulate properly through vents. We can test and replace as needed.


If changing your filter doesn’t help, it’s a good idea to have a local AC company like CM Expert inspect your unit. As trusted air conditioner repair experts serving Ajax for over 15 years, we can quickly identify the source of the problem and get your cooling back in action.

Deciding whether to repair or replace your air conditioner in Ajax depends on factors like its age, repair costs, and ongoing energy efficiency. Generally, it’s worth repairing if:


  • The unit is less than 10 years old. AC systems have a long lifespan when well-maintained, so younger units are often repairable.
  • Repair costs are less than half the cost of a new unit. Get quotes from CM Expert and other local companies to compare.
  • Only a component like a capacitor or fan motor needs replacing. These targeted repairs tend to be cheaper than a full system overhaul.
  • The unit cools well after the repair. If it still struggles, replacement may be the better long-term solution.


It’s not worth repairing an older AC that has developed multiple issues over time. Replacing with an Energy Star model can lower your bills. Our technicians can assess the extent of problems and recommend the best financial option.

While many minor AC issues can be DIY projects, we generally don’t recommend trying to repair central air conditioners yourself unless you’re a trained technician. The electrical and refrigerant components require specialized equipment and expertise to work on safely. However, here are a few simple checks you can do:


Replace the air filter – A dirty filter is one of the most common causes of reduced airflow. Make sure to use filters rated for your specific system.

Check thermostat settings – Confirm the thermostat is set properly and not stuck on constant cooling mode. You can also clean it with a damp cloth.

Inspect outdoor unit – Look for overgrown plants or debris blocking airflow. Clear away anything obstructing the fan and coils.

Tighten electrical connections – Over time, loose wires can cause intermittent issues. Check that all connections are secure.


If the problem persists after these basic checks, it’s best to schedule an appointment with an AC pro like us. Homeowners could risk damaging the system or voiding the manufacturer’s warranty by attempting repairs they aren’t trained for.

When trying to diagnose why your AC isn’t working properly, one thing our technicians check for is low refrigerant levels. The refrigerant is a gas that flows through the air conditioner and allows it to cool efficiently.


Over time, the refrigerant may leak out of your system through small cracks or loose fittings. This is one of the leading causes of air conditioners in Ajax failing to reach or maintain the temperature you select on the thermostat.


With less refrigerant flowing through the coils and pipes, the unit has to work much harder but can’t keep up with demands. It may ice up or freeze over on warm days. In severe cases, no cold air will come through vents at all.


If low refrigerant is diagnosed, a recharge is needed to replenish what has depleted. But a licensed technician like ours must perform the service. We have special equipment and follow EPA guidelines for the safe handling of refrigerants.

Here are some key things homeowners in Ajax can check if their air conditioner isn’t working properly:


  • Thermostat setting – Confirm it’s calling for cooling mode and the temperature is set below the room’s actual temperature.
  • Circuit breakers/fuses – If tripped or blown, these can cut power to the unit and need to be reset.
  • Air filter – Ensure it’s clean and installed correctly. A dirty filter impedes airflow and efficiency.
  • Outdoor unit – Look for obstructions, debris or overgrown plants blocking air intake and outtake vents. Clear the area.
  • Refrigerant level – Low refrigerant prevents proper cooling. This check requires gauges that technicians like ours have.
  • Wiring connections – Loose or corroded wires may cause power interruptions; tighten access points.
  • Thermostat batteries – Weak batteries can cause malfunctions; replace them if needed.


If issues persist after checking these areas, it’s best to contact a pro. As the experts servicing Ajax for over 15 years, we can thoroughly inspect your entire AC system and diagnose the root problem.

Here are some signs that indicate your air conditioner in Ajax may need freon (refrigerant):


  • Inconsistent cooling – The unit may work fine some hours and struggle to keep the home cool at other times. Low refrigerant causes unstable performance.
  • Freezing or icing over – On warm days, frost or ice may form prematurely on the outdoor coils. This happens when refrigerant levels are too low to properly extract heat.
  • Higher than normal operating pressures – The compressor has to work overtime to circulate insufficient refrigerant, putting undue strain on the system.
  • Prolonged run times – With less refrigerant, it takes longer for the AC to reach and maintain the temperature set on your thermostat.
  • Unusual noises from the compressor – Low refrigerant alters how the compressor functions and may cause new vibrations or sounds.
  • Dirty coils – Low airflow due to low refrigerant leads to dirt and debris accumulating more quickly on indoor and outdoor coils.


Our technicians use specialized gauges and tools to check refrigerant levels and diagnose the exact issue. An evacuation and recharge is typically needed if levels are low, restoring your AC’s ability to efficiently cool your Ajax home.

There’s no definitive lifespan for air conditioners, as proper maintenance and repairs can help extend their use well beyond 15-20 years in many cases. Some factors that influence an AC’s longevity include:


  • Unit size: Larger commercial units tend to last longer than smaller residential systems.
  • Climate: Units in very hot or humid areas like Ajax face increased stress that can shorten the life span.
  • Filtration: Changing filters monthly traps dirt and extends the life of internal components.
  • Maintenance: Annual pro cleaning and tune-ups catch small issues before they become expensive repairs.
  • Usage: Heavier use during peak seasons contributes to more operating hours over the years.

Manufacturer quality: More reputable brands often use longer-lasting materials.

The decision to repair or replace an AC in Ajax depends on individual unit factors and the extent of the needed work. Some general guidelines:


  • Units under 10 years old are usually better candidates for repair if a component like the fan or capacitor needs replacing.
  • If a system is 10-15 years old but has been well-maintained, repair may still be more cost-effective than full replacement.
  • Extensive repairs exceeding 50% of the replacement cost usually indicate it’s more economical to upgrade to a newer, more efficient model.
  • Replacing is recommended for units consistently requiring repairs each year or with multiple component failures.
  • Repairs are worthwhile for properly functioning units just need a refrigerant recharge or safety inspection.
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