When the temperature drops and you're relying on your furnace to keep your home warm and cozy, discovering that it's not kicking on can be quite frustrating. A malfunctioning furnace can disrupt your comfort and leave you searching for answers. Our experts at One Hour Heating & Air Conditioning of Delmarva want to make sure you know the common reasons why your furnace might fail to turn on–and what to do when you find yourself out or in(side) the cold.

1. Check the Thermostat

The first place to start when your furnace fails to kick on is the thermostat. Ensure that the thermostat is set to the desired temperature and that it is set to "heat" mode. Sometimes, simple settings adjustments can resolve the issue. If you have a programmable thermostat, check the batteries and make sure the program is correctly set. If necessary, try replacing the batteries or resetting the thermostat to its factory default settings.

2. Verify the Power Supply

Next, check the power supply to your furnace. Ensure that the power switch, usually located near the unit, is turned on. Additionally, check the circuit breaker or fuse box to make sure the circuit supplying power to the furnace is not tripped or blown. If you find any issues, contact a professional immediately to diagnose and fix electrical problems safely.

3. Replace the Air Filter

A clogged or dirty air filter can restrict airflow and cause the furnace to shut down as a safety precaution. Check your furnace's air filter and replace it if it appears dirty or clogged. Regularly replacing the air filter, usually every one to three months, is essential for optimal furnace performance.

4. Inspect the Pilot Light or Ignition System

For furnaces with a pilot light, check if the flame is lit. If not, follow the manufacturer's instructions to relight it. However, if you have an electronic ignition system, listen for a clicking sound that indicates the ignition is attempting to light the furnace. If there is no clicking sound or the ignition system is malfunctioning, contact an electrical professional to inspect and repair the issue safely.

5. Address Gas Supply Issues

If your furnace runs on natural gas, ensure that the gas supply valve to the furnace is fully open. If you suspect a gas leak or smell gas, immediately evacuate your home and contact your gas company or emergency services. Gas leaks are hazardous and require immediate professional assistance.

6. Call One Hour Heating & Air Conditioning

When all else fails and your furnace still refuses to turn on, it's time to reach out to the experts at One Hour Heating & Air Conditioning. Our team of highly skilled technicians will help get your furnace up and running efficiently, ensuring your home remains comfortable during the colder months.

Contact Us For Furnace Services Today!

A furnace that fails to turn on during chilly weather can be a major inconvenience, not to mention potentially dangerous. By following certain troubleshooting tips, you can identify and address common issues that may prevent your furnace from kicking on. Remember, if you're unable to diagnose or fix the problem on your own, don't hesitate to contact One Hour Heating & Air Conditioning.