When your furnace quits on a cold winter’s day, it can go from inconvenient to dangerous pretty quickly. Knowing what to do (and who to call) can make all the difference. Here’s your guide from John Lock AC & Heating to stay safe, warm, and prepared.
1. Stay Calm & Assess the Situation
- Check your thermostat first, make sure it’s set to heat, not cool, and that the temperature setting is above the current room temperature.
- Look at the furnace switch (often near the unit or in a hallway), someone may have accidentally turned it off.
- Confirm the furnace filter isn’t clogged. Restricted airflow from a dirty filter can often cause a shutdown.
2. Do Basic Checks You Can Handle
If you’re comfortable, try these simple troubleshooting steps:
- Power source: Ensure the furnace is getting power. Check breakers or fuses to confirm they haven’t tripped or blown.
- Pilot light / ignition: If your unit has a pilot light, make sure it’s burning. If not, follow the manufacturer’s instructions for relighting (or call a pro).
- Gas supply (if applicable): If it’s a gas furnace, ensure your gas line valve is open. Never tamper with gas lines beyond checking the valve, leave repairs and adjustments to licensed technicians.
- Check vents and registers: Blocked or closed vents can strain the system. Make sure all vents are open, unblocked, and allow air to flow.
3. Maintain Safety
- Keep combustible materials (paint cans, boxes, fabric, etc.) away from the furnace.
- If you smell gas, leave your home immediately, and call your gas provider and 911. Don’t turn on switches or use phones inside the house if there’s a gas leak.
- Use safe alternative heating (space heaters, wood stove) only if they are properly maintained, placed on stable surfaces, away from flammables, and with proper ventilation.
4. Keep Warm While Waiting for Help
- Close off unused rooms to retain heat where people are.
- Use extra layers: sweaters, blankets, hats.
- Let sunlight in during the day by opening curtains and blinds. Close them before night to reduce heat loss.
- If you have ceiling fans, run them in reverse (clockwise) on low speed to redistribute warm air from the ceiling.
5. Call the Pros: John Lock AC & Heating’s Emergency Support
If none of those fixes work, or if your furnace is making unusual noises, emitting smells, or showing warning codes, don’t wait. John Lock AC & Heating offers:
- Fast-response furnace repair for Western New York homes.
- Licensed, experienced technicians who can diagnose and resolve common and complex issues.
- 55+ years of heating system know-how, fair pricing, and respectful, punctual service.
6. Preventive Measures to Avoid Future Failures
Once your furnace is back up, these tips can help prevent future emergencies:
- Schedule regular maintenance: filter changes, inspections, and cleanings, it saves headaches down the road.
- Replace old furnaces before they become unreliable (age, parts wear, and efficiency drop are good indicators).
- Install smart thermostats or programmable timers to reduce stress on the system.
- Keep combustion air vents and furnace area clean, clear, and unobstructed.
If your furnace fails, don’t wait in the cold. Call John Lock AC & Heating at 716-894-6400. We’re here to help you stay safe, warm, and comfortable, 24/7 when it matters.
Stay warm.
