When to Repair vs. Replace Your Furnace

The repair-or-replace question

A furnace is one of the biggest investments in your home's comfort. Knowing when to repair and when to replace can save you thousands over the years.

The 50% rule

If a repair costs more than half the price of a new furnace — and your unit is over 15 years old — replacement is usually the better call.

Signs it's time to replace

• Your furnace is over 15 years old
• Rising energy bills despite regular maintenance
• Frequent repairs in a single season
• Uneven heating across rooms
• Yellow pilot light (a sign of carbon monoxide risk — call immediately)

Signs a repair is enough

• The unit is under 10 years old
• The issue is a single worn part (blower motor, igniter, thermocouple)
• Your energy bills have stayed steady

Get a professional assessment

The IAQ Pros offers honest, no-pressure furnace evaluations across Des Plaines and the northwest suburbs. We'll help you make the right call.