Heating
Signs Your Furnace Needs Replacement
January 10, 2025
4 min read
If your furnace is over 15 years old or showing these warning signs, it may be time for a replacement.
By Energy Solutions — Family-run in Antioch since 1998
Warning Signs
Age over 15 years. Efficiency and reliability both fall off a cliff.
Rising gas bills despite similar weather and thermostat settings.
Uneven heating — some rooms hot, others cold.
Frequent repairs — two or more in the last two years.
Yellow burner flame instead of blue. Combustion problem.
Rust on the flue or heat exchanger.
Any CO alarm activation. Stop using the furnace and call.
What Replacement Buys You
Modern 96% AFUE furnaces cut gas use 20–30% versus a 20-year-old 80% unit. Two-stage and modulating models deliver quieter, more even heat. Rebates and the federal 25C credit typically offset $500–$2,000 of the upgrade cost.
Frequently Asked Questions
How long do gas furnaces last in the East Bay?
15–20 years on average. Mild winters mean less runtime than a Midwest furnace, so East Bay systems often push toward the upper end — if they've been maintained.
Is a cracked heat exchanger repairable?
No. A cracked heat exchanger requires furnace replacement — it's a carbon monoxide safety issue and the part cost plus labor almost always exceeds the value of the furnace.
Free In-Home Estimates — Even in July
Family-run HVAC in Antioch since 1998. EPA-certified technicians. BBB-accredited. Authorized Bryant dealer. 10-year manufacturer warranty on every install. We'll come out, look at your system, and tell you straight what's going on — repair, service, or replacement. No pressure, no upsell.
CA Lic. #1132058
More from the blog
Seasonal
Mid-Summer HVAC Playbook: How to Get Your AC Through August in the East Bay
Your AC has been running non-stop for six weeks. Here's how to keep it alive through August in the East Bay — warning signs, PG&E fixes, and honest replace-or-repair advice.
Seasonal
Winter to Spring Temperature Swings: How Fast Weather Changes Stress Your HVAC System
When East Bay weather swings from 50°F mornings to 80°F afternoons, your HVAC works overtime. Here's how to protect your system.
Heating
How Much Does Furnace Replacement Cost in the East Bay?
Furnace replacement in the East Bay typically costs $4,500 to $12,000 depending on efficiency, brand, and installation complexity.
Company
Service Areas
Contact
Mon–Fri 7:30AM–4:30PM · Sat–Sun Closed
CSLB License #1132058
Accredited
© 2026 Energy Solutions Heating & Air Conditioning. All rights reserved.
Antioch, CA · Serving the East Bay