When the summer heat hits London, Ontario, the last thing you want is for your air conditioner to break down unexpectedly. Unfortunately, air conditioning failures tend to happen at the worst possible times—usually during a heatwave or in the middle of the night. That’s why AC repairs in London are one of the most urgent services we provide at Constant Home Comfort.
As one of the city’s most trusted HVAC providers, we offer 24/7 emergency air conditioner repair services to ensure your home stays cool and comfortable, no matter what time it is. Whether your AC is blowing warm air, leaking, or simply not turning on, our technicians are ready to respond fast.
We’ll cover the five most common air conditioner emergencies we encounter in London homes and explain how our team fixes them quickly and effectively. We’ll also provide some helpful prevention tips so you can avoid future issues and reduce the need for emergency repairs.
1. AC Is Running But Not Cooling Your Home
One of the most common reasons homeowners call us for AC repairs in London is because their system is running, but the air coming out is warm or not cool enough to make a difference. This can be frustrating and even dangerous in extreme heat, especially for seniors or households with small children.
Common Causes:
- Incorrect thermostat setting (“On” instead of “Auto”)
- Low refrigerant levels
- Clogged or dirty air filters
- A failing compressor
- A dirty or blocked condenser unit
Our licensed technicians will arrive to diagnose the issue. In many cases, the fix may be as simple as replacing a filter or resetting your thermostat. If the problem is more complex, such as a refrigerant leak or a faulty compressor, we come prepared to handle these repairs immediately.
Have your system professionally maintained every spring to check refrigerant levels, clean filters and coils, and ensure your AC is cooling efficiently before the summer heat arrives.
2. No Airflow or Weak Air Circulation
You turn on your air conditioner, but nothing happens—or the airflow is so weak it barely cools one room. Poor circulation is a sign that something is seriously wrong and needs attention.
Common Causes:
- A tripped circuit breaker
- A malfunctioning blower motor
- Frozen evaporator coils
- Blocked ductwork
- Electrical problems in the system
As specialists in AC repairs in London, we know how to trace electrical faults, fix blower issues, and thaw frozen coils. We also inspect your ductwork to ensure there are no blockages restricting airflow. Once the cause is found, we make fast, effective repairs to restore your home’s cooling.
Avoid running your AC at extremely low temperatures for long periods. Regular maintenance can prevent freezing and ensure your blower components stay in working condition.
3. Leaking Water or Moisture Around the Unit
You notice water pooling around your indoor unit or dripping from the ceiling. While not always a sign of total failure, leaks can cause mold, water damage, and costly repairs if not addressed quickly.
Common Causes:
- Clogged condensate drain line
- Broken or rusted drain pan
- Frozen evaporator coil
- Improper installation or insulation
Our technicians will clear clogged drain lines, repair or replace broken drain pans, and ensure proper insulation is in place. If the evaporator coil is frozen, we resolve the underlying issue, whether it’s dirty filters or low refrigerant levels.
Check for signs of moisture during the cooling season. If you notice damp smells or minor leaks, book a service call before it turns into a bigger problem.
4. Loud or Unusual Noises from an AC Unit
Any sudden buzzing, hissing, chirping or screeching from your AC unit is a clear indicator that something has gone awry; such noises could indicate loose parts, debris accumulation or electrical problems within its components.
Common Causes:
- Wonky fan blades or broken fan arms
- Worn belts or motor bearings
- Debris in the condenser fan and refrigerant leakage
We conduct a detailed inspection to identify the source of noise. Depending on its cause, we may tighten parts, replace worn components, or safely clear away debris. Furthermore, we look out for refrigerant leaks or electrical hazards which could impede performance.
If you hear strange noises, don’t ignore them! Call Constant Home Comfort immediately, as early intervention could prevent more extensive damage.
5. Bad Smells From AC Vents
If your air conditioning unit emits musty, burning or chemical odours that indicate mold growth or electrical malfunction, that should be taken seriously as an immediate safety risk.
Common Causes:
- Moderately warm ac conditioned space
- Mold in ductwork or evaporator coil
- Burnt wiring or overheated parts
- Blocked drain lines that stagnate water
- Stagnant drain lines resulting in stagnated water accumulation, as well as pest infestation in the duct system.
Our technicians will sanitize and clean coils on your AC system before inspecting electrical components for safety. UV lights may also be installed to help prevent mold growth and improve indoor air quality.
For optimal air quality in your home, regularly change air filters and make sure they remain well ventilated. If any unusual smells persist after running the system again, schedule an inspection appointment as soon as possible before restarting it.
Constant Home Comfort Is London’s Premier Provider of AC Repair Solutions
When your air conditioner fails, you need a team you can trust to respond fast and fix the issue right the first time. Constant Home Comfort is proud to be one of the top-rated providers of AC repairs in London and the surrounding area.
Here’s why homeowners trust us with their emergency and routine HVAC needs:
- 24/7 emergency service — We’re available anytime, day or night.
- Certified technicians — Our team is fully licensed, insured, and experienced.
- Fast response times — Same-day service is always available.
- Affordable pricing — We offer competitive rates and transparent quotes.
- Rebate assistance — We help you apply for HVAC rebates and grants in Ontario.
- Trusted reputation — Top ratings on BBB, HomeStars, and Google Reviews.
We don’t just fix your AC, we give you peace of mind with quality service and dependable support, no matter the time or temperature.
Book Emergency AC Repairs in London Today
If you’re facing an AC breakdown, don’t wait. The sooner you call Constant Home Comfort, the sooner we can restore cool, comfortable air to your home. Our 24/7 AC repairs in London are just a phone call away. We guarantee fast, affordable service by trained professionals.
Call us now at (226) 240-3219 or book your emergency repair online. Same-day appointments available.