To know if your furnace is safe, test your carbon monoxide (CO) detectors, check that your burner flame is steady and blue (not yellow), and listen for unusual banging or scraping noises. If you ever smell gas or your CO alarm goes off, evacuate immediately and call emergency services.
Pressure Switch Errors (Codes 31-33 on Carrier/Bryant, 2-3 flashes on Goodman) Despite being the most common furnace error, actual pressure switch failure remains uncommon. Most stem from venting restrictions or drainage issues.
To reset a Goodman furnace safely, turn your thermostat to "OFF". Next, locate the furnace's exterior power switch (looks like a regular light switch on or beside the unit) and flip it off for 30–60 seconds, then back on. If it locks out again, you may need to press a manual limit switch.
Furnaces typically last 15 to 20 years, but well-maintained units can often operate longer. If your furnace is 25 years old, it likely means you've been maintaining it properly by scheduling annual maintenance and routine care. However, its age puts it at a higher risk for increased repairs and a complete breakdown.
The $5,000 rule is a guideline to help homeowners decide whether to repair or replace their HVAC system. You multiply the age of your unit by the cost of the needed repair. If that number exceeds $5,000, replacing your HVAC system is often more cost-effective.
A standard furnace lasts between 15 and 20 years on average, though electric furnaces can stretch up to 20 to 30 years. Regular maintenance, such as annual tune-ups and changing your filters every 1 to 3 months, is the most important factor in reaching or exceeding this lifespan.
The heat exchanger is often considered the most costly part of a furnace to repair or replace. It is a critical component that transfers heat from the combustion process to the air that circulates throughout your home. Over time, heat exchangers can crack due to the constant heating and cooling cycles they undergo.
Average Cost to Replace a Furnace
However, the cost of furnaces can range widely depending on their size, type, and efficiency, and homeowners can generally expect a new furnace to cost anywhere between $3,800 and $10,000. If efficiency is important to you, high-efficiency models can reach up to $12,000.
5 Warning Signs It's Time for Furnace Replacement
Yes HVAC prices have steadily increased over the past few years, and 2026 is no exception. These increases are affecting everything from entry-level systems to high-efficiency units, making it more expensive than ever to install or replace HVAC systems.
Press the reset button and hold it for 5-10 seconds. When you see a solid red light, it means you have successfully reset your Goodman Furnace!
A furnace requires two types of maintenance: routine tasks you can handle yourself (like replacing filters) and annual tune-ups performed by a certified HVAC technician. Keeping up with these prevents unexpected breakdowns, lowers energy costs, and ensures your home stays safe from carbon monoxide leaks.
To get your furnace to kick on, first verify your thermostat is set to "Heat" and raised at least 5 degrees above room temperature. Next, check that the furnace power switch (usually resembling a standard light switch on or near the unit) is toggled "ON".
If it doesn't start at all, you can press the button one more time. But, if you press the reset button and your furnace goes on and turns off again, don't press the button again. Continuing to press the reset button can damage your system. Doing so will pump more oil into the furnace and worsen any existing issues.
Short cycling
This is one of the most common furnace problems, and it can stress important furnace components such as the blower motor, limit switch, or flame sensor. There are several potential causes of short cycling, including some that are related to your furnace's built-in safety systems.
A furnace blinking 3 times generally indicates a Pressure Switch Fault (often "stuck open"). This safety mechanism prevents the furnace from igniting if there isn't proper airflow, venting, or vacuum pressure within the system.
No, a standard gas furnace will not work without electricity. Even though they use natural gas or propane for heat, they rely entirely on electricity to power the ignition, safety sensors, control board, and blower motor.
The pilot light on your furnace should have a steady blue flame. If this turns yellow or starts to flicker, this is a sign there's not enough oxygen and carbon monoxide is being released into the air. Turn your furnace off and call your heating professional right away to diagnose and repair the problem.
Scraping Sounds
Ask an expert, “What does a failing furnace sound like?” and they'll tell you to pay attention to any scraping or grinding noises. This distinct sound might indicate loose parts or issues with your blower motor.
If you make qualified energy-efficient improvements to your home after Jan. 1, 2023, you may qualify for a tax credit up to $3,200. You can claim the credit for improvements made through December 31, 2025. For improvements installed in 2022 or earlier: Use previous versions of Form 5695.
The most reliable furnace brands are generally Trane, Rheem (and its sister brand Ruud), and Carrier. However, HVAC professionals agree that installation quality matters more than the brand itself. A poorly installed high-end unit will break down faster than a basic model installed correctly.
Furnace replacement may be covered by homeowners insurance if it was damaged by a covered peril. For example, fire, storm damage, or water from a burst pipe could qualify as sudden and accidental events that trigger coverage up to your policy's limits.
What fails first on a furnace? The most common early failures are the furnace ignitor or flame sensor, as they experience regular wear and tear and are critical to starting the heating cycle.
Try the Salvation Army, a local church, or a community action agency. Their rules may be different. Ask About Payment Plans: Many local HVAC contractors, including Smart Climate Solutions, offer payment plans for urgent repairs because we believe everyone deserves a warm home.
No heat is considered an emergency, even on a mild day, because the loss of heat could indicate severe HVAC problems that could threaten the safety of your home. Gas leak – A gas, propane, or fuel-oil furnace leak is a life-threatening emergency.