1. Check the Thermostat
To begin, ensure your thermostat is instructing your furnace to turn on.
- Change the batteries if the screen is empty. If the digital display is messed up, the thermostat could need to be swapped out.
- Make certain that the switch is set to “heat” rather than “off” or “cool.”
- Ensure the program is set to the right day and time and is programmed to “run.” If you’re having trouble getting out of the program, adjust the temperature by utilizing the up/down arrows and holding the “hold” button. This will make the heating to start if thermostat scheduling is a problem.
- Set the temperature setting to 5 degrees warmer than the room temperature.
If your heat hasn’t kicked on within a couple minutes, make sure it has power by toggling the fan switch from “auto” to “on.” If the fan doesn’t begin to run, your heating system may not have power.
If you use a smart thermostat—like one manufactured by Nest, Ecobee, Lux, Honeywell or Bosch—troubleshooting will depend on your model. Check the manufacturer’s website for assistance. If you still can’t get your Wi-Fi thermostat to operate, calll us at 850-250-0335 for heating and cooling service.
2. Inspect Breakers and Switches
Next, you will need to verify your breaker and furnace switch are on.
- Locate your house’s main electrical panel. If you have no idea where it is, look for a silver metal box in your basement, garage or closet.
- Ensure your hands and feet aren’t moist prior to touching the panel or breakers.
- Locate the breaker marked “furnace” or “heat,” and ensure it’s reading “on.” If you discover a tripped breaker, it will be in the middle or “off” position.
- Moving one hand, firmly flip the breaker to the “on” location. If the breaker trips right away and pops back to “off,” leave it alone and contact an expert from Gordon Air Conditioning at 850-250-0335 right away.
No matter your furnace’s age or brand, it has no less than one standard wall switch located on or close to it.
- Make sure the switch is flipped up in the “on” placement. If it was turned off, anticipate your furnace could take up to five minutes to ignite. (If you’re unsure where to locate your furnace, check your basement, garage or utility closet. It may also be in a crawl space or attic.)
3. Replace the Air Filter
When we think about heater problems, a grungy, blocked air filter is often the top offender.
If your filter is too dirty:
- Your furnace won’t stay on, or it may get too hot from reduced airflow.
- Your heating bills might increase because your furnace is turning on too often.
- Your heater might stop working prematurely since a dusty filter causes it to work overtime.
- Your heating system may be cut off from power if an excessively clogged filter is the cause of a tripped breaker.
Depending on what model of heating system you own, your air filter will be inside the blower compartment of your furnace, an attached filter case or wall-mounted return air grille.
To swap out your filter:
- Cut the power to your heating system.
- Remove the filter and angle it toward the light. If you can’t see light through it, get a new one.
- Insert the new filter with the arrow motioning toward the heating system to avoid damage.
Flat filters should be replaced every month, while pleated filters should be used for about three months. You can also buy a washable filter that will last about 10 years. If you have children or pets, you could have to change your filter sooner.
To make the procedure go more quickly in the future, write with a permanent pen on your furnace exterior or ductwork to indicate the airflow direction and filter size.
4. Look at the Condensate Pan
Also known as drain pans, condensate pans hold liquid your heater draws from the air.
If water is seeping from your heater or its pan has standing water in it, follow these recommendations.
- If your pan contains a drain (look for a PVC pipe), check that it isn’t full. If it requires draining, get a special pan-cleaning tablet you can buy at home improvement or hardware retailers.
- If your pan has a pump, check the float switch. If the button is jammed “up” with liquid in the pan, contact us at 850-250-0335, because you will probably have to buy a new pump.
5. Look for Heating Error Codes
If faults continue, look within your furnace’s plastic window to verify the blower motor’s status. Depending on the brand, the light could also be attached on the surface of your heater.
If you see anything except a solid, colored light or blinking green light, call us at 850-250-0335 for HVAC service. Your heater might be emitting an error code that needs specialized service.
6. Clean the Flame Sensor
If your heating system attempts to work but turns off without blowing heat, a grimy flame sensor could be responsible. When this occurs, your heating system will attempt to turn on three times before a safety feature shuts it down for approximately an hour.
If you feel okay with removing the panels from your heater, gently scrubbing your flame sensor is a job you are able to do yourself. Or, one of our heating service professionals has the ability to do it for you.
If you are fine with cleaning the sensor yourself, you need:
- A 1/4” hex screwdriver or wrench
- Bit of light grit sandpaper, steel wool or emery cloth
- A fresh paper towel
- Disable the heating system’s power through its wall switch or breaker. If your gas valve isn’t electric, you will need to shut off the gas in addition.
- Lift off the furnace’s front panel and track the wire to the flame sensor.
- Take off the rod and use your sandpaper, steel wool or emery cloth to carefully scrub the metal rod.
- Clear the rod with a paper towel.
- Remount the sensor.
- Put the furnace doors back on.
- Switch the furnace’s power back on. It may go through a sequence of examinations before proceeding with regular heating. If your furnace doesn’t ignite, the sensor may have to be replaced or something else might be wrong. If this happens, contact us at 850-250-0335 for heating and cooling repair help.
7. Relight the Pilot Light
If you are using an older heater, the pilot light could be out. To light it, locate the directions on a sticker on your heating system, or follow these recommendations.
- Find the lever beneath your heating system marked “pilot,” “on” and “off.”
- Turn the switch to the “off” position.
- Wait at least five minutes to prevent sparking a fire.
- Move the knob to “pilot.”
- Push the “reset” lever as you move the flame of a long lighter to the pilot light opening.
- Release the “reset” button once the pilot light is ignited.
If you have tried the instructions twice and the pilot light still won’t light or stay burning, get in touch with us at 850-250-0335 for furnace service.
Double-Check Your Gas Supply
Try switching on another gas appliance. If it doesn’t function, your natural gas delivery might be shut off, or you could be out of propane.