It's 11 PM, it's -25°C outside, and your furnace just stopped working. Your house is getting cold fast and your family is counting on you. Don't panic. Here's a step-by-step guide on what to do when you need emergency furnace repair in Ottawa—including some troubleshooting steps that might get your heat back on before you even make a call.
Step 1: Check the Obvious Things First
Before calling for emergency service, check these common issues that homeowners can resolve themselves:
- Thermostat settings: Make sure it's set to "Heat" and the temperature is set above the current room temperature. If it's a battery-powered thermostat, try fresh batteries.
- Furnace switch: There's usually a light switch on or near the furnace. Make sure it hasn't been accidentally turned off.
- Circuit breaker: Check your electrical panel. A tripped breaker can shut your furnace down. Reset it once—if it trips again, don't keep resetting it.
- Furnace filter: A severely clogged filter can cause the furnace to overheat and shut down as a safety measure. If your filter is packed with dust, replace it and try restarting the furnace.
- Gas supply: If you have other gas appliances (stove, water heater), check if they're working. If nothing gas-powered is working, the issue may be with your gas supply, not the furnace.
Step 2: Know the Safety Red Flags
Some situations require immediate action beyond calling an HVAC technician:
- Smell of gas: If you smell rotten eggs or sulfur, leave the house immediately, don't flip any switches, and call Enbridge Gas (1-866-763-5427) and 911 from outside.
- Carbon monoxide alarm: If your CO detector is beeping, evacuate immediately and call 911. Do not re-enter until emergency services clear the home.
- Visible damage or sparking: If you see scorching, melting, or sparking near your furnace, shut off the power at the breaker and call for service.
Step 3: Protect Your Home from Freezing
While waiting for emergency repair, take steps to prevent frozen pipes and maintain some warmth:
- Open cabinet doors under sinks to expose pipes to warmer indoor air.
- Let faucets drip slowly to prevent pipe freezing.
- Use electric space heaters in occupied rooms (never leave them unattended or near flammable materials).
- Close off unused rooms and gather the family in one area to conserve body heat.
- If you have a fireplace or wood stove, use it—but ensure the flue is open.
Step 4: Call for Emergency Furnace Repair
When you call Dtech Services for emergency furnace repair, here's what to have ready:
- Your furnace brand and model (usually on a label on the front panel)
- Any error codes displayed on the furnace (flashing LED lights or digital readout)
- What happened before it stopped (strange noises, smells, gradual decline, or sudden shutdown)
- Your address and a phone number where you can be reached
Common Emergency Furnace Problems
The most common reasons for emergency furnace failures in Ottawa include:
- Ignition failure: The furnace tries to start but can't light. This could be a faulty igniter, flame sensor, or gas valve issue.
- Blower motor failure: The furnace lights but no air comes through the vents. The blower motor or capacitor may have failed.
- Limit switch lockout: The furnace overheated and locked out as a safety measure, often caused by restricted airflow from a dirty filter.
- Thermostat malfunction: A failing thermostat can send incorrect signals or no signals at all.
- Circuit board failure: The electronic control board can fail, especially during power surges.
Dtech Services: Emergency HVAC Repair in Ottawa
We understand that furnace emergencies don't wait for business hours. Dtech Services provides emergency furnace repair across Ottawa and surrounding areas. Our licensed technicians arrive equipped to diagnose and repair most furnace problems on the first visit. Call (613) 909-8801 for emergency service.


