Furnace Repair Cost in Nashville, TN
Lennox 4-Ton 20 SEER

The average cost of furnace repair in Nashville, TN with a Lennox 4.0-ton 20 SEER system is $900, with most homeowners paying between $820 and $970 depending on home conditions, permit fees, and labor availability. The Lennox 4.0-ton unit is a premium, energy-efficient unit engineered for long-term reliability, sized for homes with 1,600-2,100 sq ft of conditioned space. At 20 SEER, this unit qualifies for federal energy tax credits and delivers exceptional long-term savings.

Cost Breakdown - Nashville, TN

* Estimates based on Nashville area labor rates ($109.95-$178.45/hr, BLS-sourced). Actual costs vary by home conditions and contractor. Get 3 quotes.

About Furnace Repair

Diagnosis and repair of furnace failures including igniter, heat exchanger, blower motor, control board, and gas valve issues. In Nashville, TN, licensed HVAC contractors typically charge $110–$178 per hour for installation labor, with this job averaging 2.0 hours.

The equipment cost for the Lennox 4.0-ton 20 SEER system represents approximately $490 of your total. Installation labor in Nashville adds $290, with permit fees, refrigerant, and disposal bringing the full estimate to $900. Prices in TN vary by contractor — always collect 3 quotes before scheduling a major HVAC installation.

Signs You Need Furnace Repair

Consider scheduling furnace repair in Nashville, TN if you notice furnace not producing heat or loud banging, rattling, or squealing or short cycling (turns on and off rapidly). Early action prevents the costly emergency service premiums common in the South region during peak seasons.

• -Furnace not producing heat
• -Loud banging, rattling, or squealing
• -Short cycling (turns on and off rapidly)
• -CO detector alarm near furnace
• -Pilot light repeatedly going out

What's Included

• -Safety and diagnostic inspection
• -Combustion analysis
• -Component repair or replacement
• -Heat exchanger crack inspection
• -Carbon monoxide test
• -Final system performance check

Hiring an HVAC Contractor in Nashville

• 1.Verify the contractor holds a current TN HVAC license and carries liability insurance.
• 2.Request an itemized quote that separates equipment, labor, and permit costs.
• 3.Ask specifically about Lennox dealer status — authorized dealers in Nashville, TN often offer extended warranties.
• 4.Confirm the quote includes refrigerant, line set, and startup commissioning — not just the equipment.
• 5.Check for manufacturer rebates and utility company incentives before signing.

Frequently Asked Questions