Keeping Warm: How to Troubleshoot Your HVAC System During a Cold Streak

January 21, 2025

As Northeast Ohio experiences a harsh cold streak, residents are relying heavily on their HVAC systems to keep their homes warm. However, increased usage can sometimes lead to system malfunctions, leaving homeowners in the cold. Here are practical tips to troubleshoot your HVAC system and stay comfortable during frigid weather.

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Common HVAC Issues and How to Fix Them

1. Furnace Not Turning On
   • Check the Thermostat: Ensure it’s set to “heat” and the temperature is higher than the current room temperature.
   • Inspect the Power Supply: Verify that the furnace is plugged in and that the circuit breaker hasn’t tripped.
   • Replace the Air Filter: A clogged filter can restrict airflow, causing the system to shut down.
2. Blowing Cold Air Instead of Heat
   • Check the Pilot Light: For gas furnaces, the pilot light should be lit. If it’s out, follow the manufacturer’s instructions to relight it.
   • Inspect the Gas Supply: Ensure the gas valve is open. If you suspect a gas issue, contact your utility company immediately.
   • Inspect the Air Filter: A dirty filter can cause overheating, triggering the system to shut down and blow cold air.
3. Uneven Heating in Rooms
   • Open All Vents: Make sure vents aren’t blocked by furniture or closed.
   • Inspect Ductwork: Look for gaps or leaks in ducts, which can cause uneven airflow.
   • Consider Zoning Options: A zoning system can help balance temperatures in multi-level homes.
4. HVAC System Running Constantly
   • Check for Drafts: Inspect doors and windows for air leaks that make the system work harder. Seal any gaps with weatherstripping or caulking.
   • Replace the Filter: A clogged filter forces the system to run longer to maintain the set temperature.
   • Inspect the Blower Motor: If it’s not functioning properly, the system may struggle to maintain consistent heating.

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Preventative Measures

1. Schedule Regular Maintenance
   • An annual tune-up by an HVAC professional can identify and fix issues before they escalate.
2. Keep Outdoor Units Clear
   • For heat pumps, ensure the outdoor unit is free of snow, ice, and debris to maintain efficiency.
3. Monitor Humidity Levels
   • Low humidity can make the air feel colder. Use a humidifier to maintain indoor comfort.

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When to Call a Professional

If your HVAC system still isn’t functioning after troubleshooting, or if you notice unusual sounds, odors, or performance issues, it’s time to contact a licensed HVAC technician. Attempting complex repairs on your own can be dangerous and may void warranties.

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Stay Safe During Extreme Cold

• Use Space Heaters Safely: Keep them away from flammable materials and never leave them unattended.
• Layer Up: Wear warm clothing and use extra blankets while waiting for repairs.
• Emergency Help: If your system fails completely and the indoor temperature drops to unsafe levels, consider visiting a warming center or contacting local emergency services.

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Your HVAC system is a crucial part of staying warm and safe during the winter. By troubleshooting common issues and knowing when to call for help, you can ensure comfort and peace of mind even during the coldest stretches.