When your furnace stops working in the middle of a cold Markham winter, it can quickly become an emergency. Before you call a technician, there are a few troubleshooting steps you can take to determine whether the issue can be resolved on your own or if you need emergency furnace repair in Markham. Here's what you need to know to stay warm and safe while handling furnace issues.

1. Check Your Thermostat Settings

One of the most common reasons a furnace won't turn on is incorrect thermostat settings. Ensure that:

  • The thermostat is set to “HEAT” mode.

  • The temperature is set higher than the current room temperature.

  • The batteries (if applicable) are fresh and not depleted.

  • The fan is set to “AUTO” instead of “ON” to prevent unnecessary air circulation.

2. Inspect the Furnace Power Supply

If your furnace isn't responding at all, check for a power issue:

  • Ensure the furnace switch is turned on. It's usually located near the unit.

  • Check your home's circuit breaker for a tripped fuse and reset it if necessary.

  • If your furnace runs on gas, ensure the gas valve is open and supplying fuel.

If your furnace still won't start, it might be time for 24-hour furnace repair near me in Markham to restore your home's warmth.

3. Change or Clean the Air Filter

A clogged air filter can cause your furnace to overheat and shut down as a safety measure. To avoid this:

  • Check your filter for dirt buildup and replace it if necessary.

  • Make sure you replace filters every 1-3 months to maintain airflow.

4. Check for Pilot Light or Ignition Issues

Older furnaces may have a pilot light that needs to stay lit, while newer models have an electronic ignition system. If your furnace isn't igniting:

  • For pilot light systems, relight it according to the manufacturer's instructions.

  • If you hear clicking but the furnace doesn't start, there may be an issue with the ignition sensor.

If the problem persists, it's best to call a professional for repair.

5. Ensure Vents and Registers Are Open

Blocked or closed vents can cause pressure buildup, forcing the furnace to shut off. Make sure all supply and return vents are fully open and unobstructed by furniture or rugs.

When to Call a Professional for Emergency Furnace Repair

If you've tried these steps and your furnace is still not working, it's time to call in an expert. Contacting a 24-hour furnace repair service in Markham ensures that you get fast, professional assistance to restore warmth to your home.

A professional technician can:

✔️ Diagnose complex electrical or gas issues.

✔️ Repair a broken heat exchanger or blower motor.

✔️ Address carbon monoxide or gas leak concerns.

Final Thoughts

A broken furnace can be stressful, but by following these troubleshooting steps, you may be able to resolve minor issues on your own. However, for major repairs, don't hesitate to contact an emergency furnace repair in Markham service to ensure your home stays warm and safe.

Need immediate help? Call a trusted HVAC technician today for 24-hour furnace repair near me in Markham and get your heating system back in working order.