Air Conditioner Services

Why Choose us?

When you hire McKeever Heating and Air Conditioning, you don’t get the typical parts replacers or the sales technicians, you get the true, qualified, AC technician. We treat every air conditioner problem the same as a doctor on his patient. We find the root of the problem and eliminate it forever. No wack-a-mole part swaps, no unnecessary equipment up-sells, just the plain truth. We implement the most thorough AC diagnostics in Durham Region. For every diagnostic and maintenance, we check the following:

• Refrigerant Charge

  • Superheat - Superheat is the measure of how much heat is added to refrigerant vapour after it has fully evaporated in the AC’s evaporator coil. It’s calculated by subtracting the saturation temperature of the vapour line by the actual temperature of the refrigerant vapour (measure at the evaporator outlet pipe). This calculation tells us if the refrigerant is fully gaseous before reaching the compressor. It is important to measure superheat on every install, maintenance, and repair to ensure the system is properly charged and working efficiently. If superheat is too low, liquid refrigerant will flood the compressor, leading to failure. If superheat is too high, the system may be undercharged with refrigerant or there is low airflow over the condenser coil. Checking superheat on every call is crucial to ensure efficient AC operation and prevent costly breakdowns.

  • Subcool - Subcooling is the measure of how much heat is removed from the liquid refrigerant after it has condensed in the AC’s condenser coil. It’s calculated by subtracting the saturation temperature of the liquid discharge line, coming out of the condenser, from the actual temperature of the liquid discharge line. The resulting subcooling calculation lets us know if the refrigerant is fully liquid before entering the metering device. We measure subcooling for every service call, maintenance, and installation to ensure refrigerant charges are correct. If subcooling is too low, the unit is undercharged, causing inefficient cooling and compressor damage. If subcooling is too high, the unit is overcharged or there is a restriction in the liquid line, causing high head pressure, which leads to the compressor overheating and ineffective cooling. By checking subcooling on every call, we save you from high energy costs and unexpected failures.

• Compressor and Condenser Fan Amp Draw

  • Measuring the amperage of both the condenser fan motor and the compressor will allow us to see if they are overworking or underperforming. Over-amping usually indicates the motor’s are under more stress than the need to be and the underlying cause must be found to resolve the issue before the motor gives out. Under-amping motors indicate that the motor is failing and is not doing it’s job as well as it should. These motors should be replaced before they completely give out in the middle of a heat wave. Our routine amperage checks will ensure your AC’s critical components remain reliable when you need them the most.

• Capacitor Capacitance

  • The capacitor is an electrical component in your AC’s condenser unit that stores and releases voltage to help start and run the compressor and the condenser fan motor. Checking the microfarads (μF), or capacitance, on your capacitor is crucial to determine it’s health. We will be able to know over time if the capacitor is starting to fail, in which case we will need to replace it before it gives out completely. A bad capacitor will stop all AC functionality, leaving you with no cooling. Our detailed analysis of your AC’s capacitor will save you from this crisis.

• Condenser and Evaporator Coil Inspection

  • A condenser and evaporator coil inspection is critical for maintaining your AC’s efficiency and longevity. These coils rely on airflow to pass through them to transfer heat from inside your home to the outside. Any blockages from dirt, debris, or pet hair can restrict airflow, forcing the system to work harder and consume more energy, potentially increasing utility bills by 20-30%. Untreated blockages in the evaporator coil can cause freezing of the coil and the refrigerant lines, causing a big build-up of ice, while blockages in the condenser coil will overheat the compressor, leading to premature compressor failure, resulting in costly repairs. Our regular inspections of the evaporator and condenser coils ensure optimal performance and extend the life of your air conditioner.

• Airflow CFM and Total External Static Pressure

  • Airflow is perhaps the most important component in the function of your AC and your comfort level in you home. The furnace needs to output a specific quantity of air, measured in cubic feet per minute (CFM), to allow the evaporator coil to properly absorb the heat out of the air and remove the humidity. If too little airflow passes over the evaporator coil, the coil could potentially freeze up and not deliver enough cool air to the rest of the house. If too much airflow passes over the evaporator coil, the air does not have enough time to transfer its heat to the coil, and thus the air is not cool enough. Major factors that influence the CFM of air in the ducts are furnace fan speed and total external static pressure (TESP). TESP is the total resistance the blower fan must overcome to move air through the ductwork, filters, coils, and other components outside the furnace. It is calculated by taking the sum of the return duct static pressure and the supply duct static pressure. On every visit, it is important to check airflow and TESP, as one directly affects the other and both play a crucial role in the efficiency of your cooling.

Whether we are doing an AC installation or a maintenance, we treat your home as if it were our own; using quality parts and proper installation practices, keeping your AC system running efficiently and lowering energy costs. We stand behind out work with clear guarantees and no hidden fees. You know exactly what you are paying for: fast, professional, and honest AC service to cool your home when you need it most. Give your AC system the care it deserves, call us or book an appointment online today, and experience real results.