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HVAC Decision Tool · Free Calculator

Repair or Replace
Your HVAC System?

Should you fix your current AC/furnace or invest in a new system? Enter your details for a data-driven recommendation based on age, repair costs, and efficiency.

When to Repair vs Replace Your HVAC

The decision to repair or replace comes down to four factors: system age, repair cost relative to replacement cost, energy efficiency, and reliability history. Our calculator weighs all four to give you a data-driven recommendation.

The $5,000 Rule

A common industry guideline: multiply the system's age by the repair cost. If the result exceeds $5,000, replace. For example, a 12-year-old system needing a $500 repair (12 × $500 = $6,000) leans toward replacement.

Energy Savings Add Up

Upgrading from a 10 SEER system to a 16 SEER system reduces cooling costs by 37%. On a $300/month summer bill, that's over $1,300/year in savings. Over 10-15 years, efficiency gains alone can pay for the new system.

Common Expensive Repairs

Some repairs are clear replacement triggers: compressor failure ($2,000-$3,500), refrigerant leak in the evaporator coil ($1,500-$2,500), or heat exchanger crack ($2,000-$3,000). Smaller repairs like a capacitor ($50-$150), contactor ($80-$200), or fan motor ($150-$400) are usually worth fixing.

Frequently Asked Questions

How long does an HVAC system last?
Central AC units typically last 15-20 years, furnaces 15-25 years, and heat pumps 10-15 years. Regular maintenance extends lifespan significantly. Systems in harsh climates (coastal salt air, extreme heat) may have shorter lives.
Is it worth repairing a 15-year-old AC?
It depends on the repair cost. A $200 capacitor replacement is worth it. A $2,500 compressor replacement on a 15-year-old unit is generally not — you're better off putting that money toward a new, efficient system.
How much does a new HVAC system cost?
A complete residential HVAC system (AC + furnace or heat pump) typically costs $5,000-$12,000 installed, depending on size, efficiency, and brand. High-efficiency systems and heat pumps are on the higher end but qualify for tax credits and rebates.

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