When the Heat Doesn’t Kick In
Few things are more frustrating than a furnace that won’t start on a cold morning. Before you panic, check the basics:
- Make sure the thermostat is set to “heat” and the temperature is higher than the current room temperature.
- Confirm the furnace switch and breaker are on.
- Replace or clean the air filter — a clogged one can restrict airflow and trigger safety shutoffs.
If the system still won’t respond, the issue could involve the ignitor, flame sensor, or gas valve — components best left to a qualified technician.
Uneven Heating Throughout the Home
If one room feels like a sauna while another feels like a fridge, it might not be the furnace itself. Check for:
- Blocked vents or furniture obstructing airflow
- Dirty ductwork or leaks
- Thermostat placement is too close to heat sources
Persistent uneven heating can indicate duct imbalances or blower issues, which require a professional’s attention.
Strange Noises or Odours
A healthy furnace should run quietly. Banging, rattling, or squealing often signals a mechanical problem — like a loose belt or motor issue.
If you ever smell gas, turn off the furnace immediately, leave the house, and call your gas provider or a licensed HVAC technician. Never try to investigate gas leaks yourself.
Short Cycling or Constant Running
If your furnace turns on and off too often, or runs endlessly without reaching temperature, it may be:
- Oversized or undersized for your home
- Experiencing a dirty flame sensor
- Suffering from a malfunctioning thermostat or limit switch
Short cycling wastes energy and can wear out components faster — a clear sign it’s time for a professional inspection.
When to Call a Pro
DIY fixes can handle dirty filters or thermostat settings, but anything involving gas lines, electrical wiring, or internal components should be handled by a certified HVAC technician.
In the Comox Valley, calling a trusted local expert ensures your furnace is serviced safely, efficiently, and in compliance with BC regulations.
A professional can:
- Diagnose complex issues quickly
- Optimize performance and energy use
- Extend your system’s lifespan
Final Thoughts
Knowing what you can safely handle — and when to call in expert help — is key to keeping your furnace running reliably. Regular maintenance and timely repairs not only prevent costly breakdowns but also protect your family’s comfort all winter long.
For homeowners in the Comox Valley, professional service isn’t just convenience — it’s peace of mind.