Four Things to Check When Your Furnace Stops Working

A functioning furnace is never more important than it is in the winter. So when your furnace stops working, it can be stressful. Before you reach for the phone to call for repairs, there are a few simple things you can check yourself that might be causing the issue.

Here’s what you can check:

Common Reasons a Furnace Stops Working & The Solutions

If your furnace suddenly stops running, it may be due to one of these common issues:

Power supply problems
If your furnace is not receiving power, it will not turn on. Check for tripped breakers, unplugged cords, or blown fuses.

Solution: Check the power supply: Ensure the furnace is securely plugged in and that the circuit breaker has not tripped. Reset the breaker if needed.

Thermostat malfunctions
A faulty or incorrectly set thermostat can prevent your furnace from starting or staying on.

Solution: Inspect the thermostat: Make sure it is set to “heat” and that the temperature is higher than the current room temperature. Replace the batteries if your thermostat uses them.

Filter blockages
A dirty air filter restricts airflow, lowers efficiency, and can eventually cause your furnace to shut down.

Solution: Replace or clean the filter: A clean air filter is essential for proper airflow. Replace it if it looks dusty or clogged, or clean it if it is reusable.

Mechanical wear and tear
Belts, motors, and sensors can wear out over time. These parts may need repair or replacement to keep your furnace running properly.

Solution: Look for visible issues: Listen for unusual noises and check the furnace for visible damage. If anything seems unusual, contact a professional technician.

When to Call a Professional

Some furnace problems should always be handled by a certified HVAC technician. Contact Able Air immediately if you notice:

Strange smells such as gas or burning odours
Electrical problems, including sparks or frequent breaker trips
Persistent shutdowns even after basic troubleshooting
Visible damage to wiring, belts, or mechanical components

Attempting to fix complex issues on your own can be dangerous and may cause more damage to your furnace.

Preventive Maintenance Tips

Regular maintenance helps prevent unexpected furnace breakdowns. Keep your system running efficiently with these tips:

Schedule a professional furnace tune-up / maintenance service each year
Replace air filters every one to three months
Keep air vents clear of dust, debris, and furniture
Vacuum or wipe around the furnace to reduce dirt buildup

Trust Able Air Conditioning & Heating for Reliable Furnace Repair

With proper care and timely service, your furnace can keep your home warm and comfortable all winter long. If you’re experiencing furnace troubles, we’re ready to help!

Need furnace repair?

Contact Able Air Conditioning & Heating today!

With over 20 years of experience in the HVAC industry, Able Air Conditioning & Heating proudly serves homeowners and businesses in Kitchener, Waterloo, Cambridge, Guelph, and nearby areas. Our award-winning team of licensed technicians is dedicated to providing reliable equipment and service our clients can trust.