Not all gas furnaces have a traditional "reset button". Instead, most feature built-in safety devices (like manual-reset limit switches or flame roll-out switches) that trip to shut the unit down. If your furnace lacks a dedicated button, you can reset it using the power switch or circuit breaker.
Inside the blower compartment: The furnace reset button is most commonly found inside the air handler unit, which is usually located next to or above the furnace itself. You'll likely need to open a panel to access this area. The panel may pop off or require you to remove screws.
If the temperature in the furnace rises above a safe level, the limit switch will then trigger the reset button, shutting down the furnace to prevent further damage or unsafe conditions. This mechanism helps avoid more serious issues, including tripping your circuit breaker.
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".
To reset your furnace, start by turning off the circuit breaker and furnace power, wait about 30 seconds to a minute, then turn the power back on. If your furnace uses gas, you may also need to turn off the gas for a few minutes before turning it back on.
5 Warning Signs It's Time for Furnace Replacement
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.
To diagnose a furnace issue, start by checking the thermostat settings and ensuring it's set to "heat" and at the right temperature. Inspect the air filter for clogs and replace if dirty. Ensure the furnace switch and circuit breaker are on.
Yes, you can manually light a gas furnace, but the exact method depends on whether it has an old-school standing pilot or a newer electronic ignition.
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.
The average lifespan of a furnace is 15 to 20 years. However, exact longevity largely depends on the system type, how heavily it is used, and how consistently it is maintained.
The manual reset process takes only 30 seconds to 3 minutes to flip the power off and on. However, after power is restored, it takes the furnace about 5 to 15 minutes to complete its safety checks, ignite the burners, and start blowing warm air.
If pressing the reset button yields no response, this may result from a circuit breaker that has tripped or a blown fuse connected to the furnace's electrical circuit. It's essential to verify the status of the circuit breaker in your electrical panel and ensure that the furnace's circuit is active.
You can press the furnace reset button if your furnace has shut down unexpectedly and you suspect a temporary issue. However, it's important to follow safe guidelines: Press the reset button only once. Wait several minutes before attempting a restart.
As the filter becomes more clogged, it can cause other parts of the furnace, such as the blower motor or heat exchanger, to overwork and eventually fail. Replacing these components can be costly, and in severe cases, you might even need to replace the entire furnace.
When your furnace refuses to turn on with the thermostat, the most common culprits are incorrect settings, dead batteries, a tripped breaker, or a dirty air filter.
Ideally, you would have your furnace serviced at least once a year. To elaborate on that point, you should have your furnace serviced at least once a year to catch any problems early on and to keep your furnace in top condition. Professional maintenance and cleaning provide many benefits, which we'll cover next.
However, with the passage of the new budget, homeowners now have until the end of 2025 to take advantage of the HVAC tax credits, which include: $2,000 for a qualified heat pump. $600 for a qualified air conditioner. $600 for a qualified gas furnace.
The best time to buy a furnace is during the off-season, specifically late spring (April-May) or early autumn (September-October), when HVAC companies are less busy and offer lower prices, rebates, or promotions. Purchasing in these shoulder seasons ensures faster installation times and better negotiating power compared to winter peak season.
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".
Most furnace issues stem from a few common culprits. The easiest to check yourself are clogged air filters and thermostat errors, which usually cause the system to blow cold air, run inefficiently, or cycle on and off constantly. Other frequent problems include dirty flame sensors or failing blower motors.
However, most gas furnaces typically last between 15 to 20 years before efficiency declines and repair costs increase, so it's wise to consider replacement around the 15-year mark to ensure optimal performance and safety.
Subtle Signs Your Furnace Is Starting to Break Down
Here's what to watch for: Increased Utility Bill: A sudden spike in your utility bill can signal inefficiency in your furnace, often a sign it's working harder than usual. Strange Noises: Unusual sounds, like banging or whistling, might indicate internal issues.
Gas furnaces and oil furnaces often require more detailed checks than electric furnaces, which can affect the overall inspection cost. A furnace inspection typically costs between $50 and $300, with an average cost of $100. Scheduling a furnace inspection in the off-season, such as late summer, can save you money.