When your furnace stops working properly, the big question arises “should you repair it or replace it?” Making the wrong choice can cost you more money, stress, and even comfort in the long run. Understanding when a repair will be the better option and when replacement is the smarter investment, the is key to keeping your home warm and your budget in check. Monterey Peninsula Sheet Metal & Heating would like to break down the main factors to help you decide whether to repair or replace your furnace.
Age of the Furnace
Furnace age is the single biggest factor. Most furnaces last 15 to 20 years with proper maintenance.
• Under 10 years old: Repairs are often worthwhile unless the issue is severe.
• 10 to 15 years old: Evaluate repair costs versus replacement.
• Over 15 years old: Replacement is usually the better long-term option because breakdowns and inefficiency become more common.
Cost of Repairs
If the repair costs more than 50% of the price of a new furnace, replacement typically makes sense. Even if repairs are cheaper, multiple small repairs can quickly add up, especially on an older system.
Energy Efficiency
Older furnaces use more fuel to produce the same heat. If your energy bills are steadily rising and your home still feels chilly, a new high-efficiency furnace can reduce heating costs by up to 30% or more. Replacement also helps reduce your home’s carbon footprint.
Frequent Breakdowns
If you are calling an HVAC technician every winter or multiple times per season it is time to rethink. Frequent breakdowns not only cost money but also risk leaving you without heat on the coldest days.
Comfort & Performance
Are some rooms always colder than others? Does the furnace struggle to reach your thermostat’s setting? Are you noticing more dust or dry air? These are signs your system is wearing out and can no longer meet your comfort needs. A new furnace will restore even heating and improve indoor air quality.
Safety Concerns
A cracked heat exchanger, gas leaks, or frequent electrical issues are serious hazards. In these cases, replacement is almost always the safest and most responsible option.
Manufacturer Warranties
If your furnace is still under warranty, repairing it might be cost-effective. However, if the warranty has expired, the cost of major parts or labor may justify an upgrade.
Emergency Heating Repair, Maintenance, Installation & More in Carmel, Pebble Beach, Seaside & Greater Monterey, California
Repairs are often more ideal when the furnace is under 10 years old, the repair cost is minimal, and the system has been reliable otherwise. Consider replacement if the furnace is 15 years old or more, the repair cost is high, efficiency is poor, or safety is a concern. It is best not to wait for a complete breakdown in the middle of a cold snap. Have a trusted HVAC professional inspect your furnace each year. They can provide an honest assessment of your system’s condition and give you a clear comparison of repair versus replacement costs. Repairing or replacing your furnace isn’t just about upfront cost. It is about long-term savings, comfort, and safety. A newer, more efficient system may pay for itself in lower bills and fewer headaches. For help determining if you need to repair or replace your furnace, contact Monterey Peninsula Sheet Metal & Heating and schedule our services today!


