5 Signs Your Furnace Needs Repair This Winter

North Carolina winters may not be as harsh as up north, but when temperatures drop into the 20s and 30s, a working furnace isn't optional — it's essential. Here are five warning signs that your furnace needs professional attention.

1. Strange Noises

Your furnace should run relatively quietly. If you're hearing banging, rattling, squealing, or popping, something is wrong.

• Banging: Delayed ignition or expanding/contracting ductwork
• Squealing: Worn blower motor belt or bearing
• Rattling: Loose components or panels
• Clicking: Ignition problems or cracked heat exchanger

2. Yellow or Flickering Pilot Light

A healthy furnace flame should be steady and blue. A yellow, orange, or flickering pilot light could indicate incomplete combustion, carbon monoxide production, or ventilation problems. This is a safety concern — call a professional immediately.

3. Rising Energy Bills

If your heating bills are climbing but your usage hasn't changed, your furnace is likely losing efficiency. Check your air filter first — a dirty filter is the most common cause. If that's not it, you may have worn components, ductwork leaks, or an aging system.

4. Uneven Heating

Some rooms toasty while others stay cold? This could indicate ductwork problems, a failing blower motor, thermostat issues, or an undersized system.

5. Frequent Cycling

If your furnace turns on and off frequently (short cycling), it's working harder than it should. Causes include a clogged air filter, overheating due to airflow restriction, thermostat malfunction, or flame sensor issues.

Don't Wait for a Complete Breakdown

Catching furnace problems early saves money and prevents emergency situations. If you notice any of these signs, schedule a furnace inspection with Frost Fire Heating and Cooling.