Why is my furnace running but not producing heat?

Common causes: dirty air filter, failed igniter or flame sensor, tripped limit switch, gas supply issue, or failed inducer motor. A technician isolates the cause quickly with diagnostic testing.

How much does heating repair cost?

Minor repairs (igniter, flame sensor): $150–$500. Blower or inducer motor: $400–$1,500. Heat exchanger: $1,500–$3,500+. Full system: $3,500–$12,000.

Should I repair or replace a system over 15 years old?

If repair exceeds 30–40% of a new system's cost, replacement often makes financial sense — especially given modern efficiency improvements. A 96% AFUE furnace can reduce heating bills 20–30% versus an older 80% unit.

Is it safe to run my furnace if it makes a loud noise?

Banging at startup (delayed ignition — potentially dangerous, call immediately). Grinding or squealing (mechanical — likely blower). Rumbling during operation (possible heat exchanger issue — CO risk, get immediate inspection). When in doubt, shut it off and call a technician.

Heating System Repair — Find Trusted HVAC Services Professionals

What Is Heating System Repair?

Heating repair covers gas furnaces, heat pumps, boilers, and electric systems — restoring heat quickly with proper safety verification for gas-fired equipment.

Common Furnace Problems

Ignition failure ($200–$600): failed igniter or flame sensor. Heat exchanger cracks ($1,500–$3,500): allows combustion gases including CO into living space — serious, requires immediate action. Blower motor failure ($400–$1,500). Inducer motor failure ($400–$800): furnace won't fire when this fails.

Heat Pump Heating Issues

Heat pumps lose efficiency below 35–40°F and should switch to backup heat — check that backup is functioning. Refrigerant leaks affect both heating and cooling. Reversing valve failure ($300–$800) prevents mode switching. Defrost cycle issues cause ice buildup.

Carbon Monoxide Safety

Gas appliance repair always involves CO risk. A licensed HVAC contractor will inspect the heat exchanger and gas connections. Install CO detectors on every floor, especially near sleeping areas and gas appliances. If your CO detector alarms, evacuate immediately and call 911.

Boiler Systems

Boilers require specialized technicians — not all HVAC contractors know hydronic systems. Common issues: pressure loss, zone valve failures, circulator pump failure, and kettling from scale buildup. Annual boiler maintenance is essential.

What to Look for in a HVAC Provider

State HVAC contractor license (required in most states) and EPA 608 certification for refrigerant handling
NATE (North American Technician Excellence) certification — the industry's highest technical standard
Experience with your specific equipment brand (ask about their top manufacturer relationships)
Transparent flat-rate or hourly pricing disclosed before the technician arrives
Manufacturer-authorized for warranty repairs on your brand
Maintenance plan options that include priority emergency scheduling

Professional Heating System Repair