What’s Wrong With My Air Conditioner? AC Repair & Troubleshooting in Whitby

When your air conditioner isn’t cooling properly, makes loud noises, or starts leaking water, it can quickly make your home uncomfortable, especially during hot summer days in Whitby and the Durham Region. Below, Walchuk Heating and Cooling answers the most common air conditioning questions homeowners search for and explains when it’s time to call a Whitby & Durham AC repair expert.


Why Is My Air Conditioner Not Cooling?


If your air conditioner is running but not cooling your home, common causes include:

  • Dirty or clogged air filters
  • Low refrigerant levels
  • Frozen evaporator coils
  • Dirty outdoor condenser unit
  • Thermostat or sensor issues

In many Whitby homes, airflow restrictions or refrigerant problems are the most common reasons an AC stops cooling properly.


Why Is My AC Making a Loud Noise?


Unusual AC noises are often a sign of mechanical trouble, such as:

  • Banging or clanking: Loose or broken internal parts
  • Grinding: Motor or bearing failure
  • Squealing: Belt or motor issues
  • Hissing: Possible refrigerant leak

Any loud or new noise should be checked quickly to prevent further damage.


Why Does My AC Keep Turning On and Off?


This issue, called short cycling, is common and can be caused by:

  • Dirty air filters restricting airflow
  • An oversized AC system
  • Thermostat placement issues
  • Low refrigerant levels
  • Electrical or control board problems

Short cycling reduces efficiency and increases wear on your system.


Why Is There Water Leaking From My AC?


Water leaking from an air conditioner is usually caused by:

  • A clogged condensate drain line
  • Frozen evaporator coils melting
  • A broken condensate pump
  • Improper installation

Water leaks can lead to property damage and should be repaired promptly.


Why Is My AC Freezing Up?


Ice buildup on your AC system often points to:

  • Restricted airflow from dirty filters
  • Low refrigerant levels
  • Blower motor problems
  • Dirty evaporator coils

If your AC freezes up, it should be turned off and inspected to avoid compressor damage.


Is It Worth Repairing My Air Conditioner?


Repairing your AC may be worth it if:

  • The system is under 10–12 years old
  • Repairs are minor or infrequent
  • The unit is otherwise efficient and reliable

A professional assessment can help determine whether repair or replacement is the better option.


How Long Should an AC Unit Last?


Most central air conditioners in the Durham Region last 12 to 15 years, depending on:

  • Regular maintenance
  • Usage and local climate
  • Installation quality

Annual servicing helps extend system life and improve efficiency

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Is It Cheaper to Repair or Replace My AC?


As a general guideline:

  • If repairs exceed 30–40% of replacement cost, replacement may be more cost-effective
  • Older systems often cost more to run and repair
  • Newer systems offer improved energy efficiency and comfort

Walchuk Heating and Cooling provides honest recommendations so homeowners can make informed decisions.


What Does It Mean If My AC Smells Musty?


A musty smell from your AC usually indicates:

  • Mold or mildew buildup
  • Moisture in ductwork
  • Dirty evaporator coils

This can affect indoor air quality and should be addressed by a professional.


Is It Safe to Run the AC If It’s Making Noise?


No. Continuing to run a noisy air conditioner can:

  • Cause further damage
  • Increase repair costs
  • Lead to complete system failure

If your AC suddenly becomes loud, turn it off and schedule service.


How Do I Know If My AC Capacitor Is Bad?


Signs of a failing AC capacitor include:

  • The system struggles to start
  • Humming sounds from the outdoor unit
  • AC shuts off unexpectedly
  • Warm air blowing even though the system is running

Capacitors are critical electrical components and should be replaced promptly when failing.


Why Is My AC Running but Not Cooling the House?


If your AC runs constantly but doesn’t cool effectively, it may be due to:

  • Low refrigerant
  • Poor airflow or duct issues
  • Dirty coils
  • An undersized system
  • Extreme outdoor heat

This issue should be inspected early to prevent compressor damage.


When to Call a Local AC Repair Expert in Whitby


Contact Walchuk Heating and Cooling if you notice:

  • Warm air or weak airflow
  • Loud or unusual noises
  • Water leaks or ice buildup
  • Frequent on-and-off cycling
  • Musty or electrical smells
  • Rising energy bills

Prompt service helps prevent breakdowns, improves comfort, and reduces long-term costs.


Trusted Air Conditioner Repair in Whitby & Durham Region


If your air conditioner isn’t working properly, don’t wait. Walchuk Heating and Cooling proudly serves Whitby, the Durham Region, and surrounding areas with fast, reliable AC repair and air conditioning service.


📍 Whitby • Durham Region • Surrounding Areas
📞 Call today to schedule your local AC service - 905-622-5435

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