furnace repair

Booneville is Getting Cold, but My Furnace Wont Turn On

Fixing your furnace might feel like a daunting chore when your heat won’t work. But it doesn’t have to be like that.

There are a few quick, low-cost fixes you can do by yourself to prevent a furnace repair call.

If your furnace won’t turn on, won’t stay on or won’t ignite, try the troubleshooting list below before contacting an HVAC professional.

If you find you need help from someone who is experienced and live in Booneville, Booneville Heating & Cooling LLC can provide assistance to you. We work on most types of heating systems.

If you’re ready for a new heating system, we also do furnace replacement in Booneville.

While you’re in touch with us, think over an annual furnace maintenance plan from Booneville Heating & Cooling LLC that may help you avoid problems in the future. We can tell you how frequently your furnace should be inspected by one of our NATE-certified experts.

Use our easy guide below to get to work on troubleshooting your furnace. Most of these steps don’t require mechanical abilities.

Steps for Furnace Troubleshooting

Check the Thermostat

To start, make sure your thermostat is telling your furnace to turn on.

If you have a digital thermostat:

  • Swap out the batteries if the screen is blank. If the digital screen is jumbled, the thermostat may need to be replaced.
  • Make sure the switch is set to “heat” rather than “off” or “cool.”
  • Ensure the program is set to the appropriate day and time and is set to “run.” If you’re having problems overriding the program, set the temperature by using the up/down arrows and press the “hold” button. This will force the furnace to start if thermostat programming is causing trouble.
  • Increase the temperature setting to 5 degrees warmer than the room temperature.
Digital Thermostat

If your furnace hasn’t kicked on within several minutes, make sure it has power by toggling the fan switch from “auto” to “on.” If the fan doesn’t run, your furnace may not have power.

If you have a smart thermostat—like one made by Nest, Ecobee, Lux, Honeywell or Bosch—troubleshooting is very model-specific. Refer to the manufacturer’s website for help. If you still can’t get your Wi-Fi thermostat to work, contact us for assistance.

Lennox Smart Thermostat

Examine Breakers and Switches

Next, you will need to check if your breaker and furnace switch are on.

  • Look for your house’s main electrical panel. If you don’t know where it is, look for a gray metal box in your basement, garage or closet.
  • Make sure your hands and feet are dry before touching the panel or breakers.
  • Find the breaker labeled “furnace” or “heat,” and make sure it’s switched “on.” If the breaker has tripped, it will be in the middle or “off” position.
  • Using one hand, firmly switch the breaker to the “on” position. If the breaker immediately trips and pops back to “off,” don’t try to reset it and call a professional from Booneville Heating & Cooling LLC at 662-269-8716 right away.

It doesn’t matter how old your furnace is or what brand it is, it has at least one standard wall switch located on or near it.

  • Make sure the switch is flipped up in the “on” position. If it was turned off, anticipate your furnace could take up to five minutes to start. (If you don’t know where to find your furnace, look in your basement, garage or utility closet. It could also be in a crawl space or attic.)

Replace Your Furnace’s Air Filter

When it comes to furnace breakdowns, a dirty, clogged air filter is often to blame.

If your filter is too dirty:

  • Your furnace won’t be able to stay on, or it could overheat from restricted airflow.
  • Your energy bills could go up because your furnace is turning on more often.
  • Your furnace could fail prematurely because a dirty filter causes it to work overtime.
  • Your furnace can lose power if an excessively dirty filter causes the breaker to trip.

Depending on what type of furnace you have, your air filter will be inside the blower compartment of your furnace, an attached filter case or wall-mounted return air grille.

Replacing a furnace filter

To replace your filter:

  • Turn off your furnace.
  • Pull out the filter and tilt it toward the light. If you can’t see light through it, use a new one.
  • Insert the new filter with the arrow pointing toward the furnace to avoid damage.

Flat filters should be replaced monthly, while pleated filters should last about three months. You can also use a washable filter that will last about 10 years. If you have children or pets, you may have to change your filter more frequently.

To make the process easier in the future, use a permanent marker on your furnace housing or ductwork to indicate the airflow direction and filter size.

Examine the Condensate Pan

Otherwise known as drain pans, condensate pans capture water your furnace pulls from the air.

If water is dripping out of your furnace or its pan has standing water in it, follow these steps.

  • If your pan has a drain (look for a PVC pipe), check that it isn’t clogged. If it needs to be drained, use a special pan-cleaning tablet you can buy at home improvement or hardware stores.
  • If your pan uses a pump, check the float switch. If the switch is stuck “up” with water in the pan, contact Booneville Heating & Cooling LLC at 662-269-8716, because you will possibly need a new pump.

Peek Inside Your Furnace

If malfunctions persist, peek inside your furnace’s plastic window to confirm the status of the blower motor. Depending on the model, the light could also be attached on the outside of your furnace.

If you see anything except a steady, colored light or blinking green light, call Booneville Heating & Cooling LLC at 662-269-8716. Your furnace may be giving an error code that needs professional help.

Clean the Flame Sensor

If your furnace tries to start but switches off without putting out heat, a dirty flame sensor could be at fault. When this takes place, your furnace will make an attempt to start three times before a safety feature powers it down for about an hour.

If you feel comfortable with opening up your furnace, cleaning your flame sensor is something you can do yourself. Or, one of our HVAC professionals at Booneville Heating & Cooling LLC can do it for you.

If you want to clean the sensor yourself, you’ll need:

  • A 1/4” hex screwdriver or wrench
  • Piece of light grit sandpaper, steel wool or emery cloth
  • A dry, clean paper towel

Next:

  • Disable the furnace’s power by using its wall switch or breaker. If your gas valve is not electric, you will need to shut off the gas as well.
  • Take off the furnace’s front panel and track the wire to the flame sensor.
  • Unscrew the rod and use your sandpaper, steel wool or emery cloth to gently rub the metal rod.
  • Wipe off the rod with a paper towel.
  • Remount the sensor.
  • Replace the furnace doors.
  • Turn the furnace’s power back on. It could proceed through a series of checks before continuing normal operation. If your furnace doesn’t start, the sensor may need to be replaced or something else may be wrong. If this happens, call Booneville Heating & Cooling LLC at 662-269-8716 for assistance.

Relight the Pilot Light

If you have an older furnace, the pilot light could be turned off. To relight it, find the instructions on a label on your furnace, or follow these steps.

  • Look for the switch on the bottom of your furnace labeled “pilot,” “on” and “off.”
  • Turn the switch to the “off” position.
  • Wait at least five minutes to avoid possibly sparking a fire.
  • Turn the knob to “pilot.”
  • Hold down the “reset” button as you bring the flame of a long lighter to the pilot light opening.
  • Release the “reset” button once the pilot light is lit.

If you have followed the instructions twice and the pilot light still won’t light or stay lit, contact Booneville Heating & Cooling LLC at 662-269-8716.

Check Your Fuel Source

Try turning on another gas appliance. If it doesn’t work, your natural gas service could be turned off, or you could be out of propane.

Booneville Heating & Cooling LLC Can Help with Furnace Problems

Followed our troubleshooting guide but your furnace still won’t work?

Call us today at 662-269-8716 or use our online scheduler. We’ll come out and pinpoint the problem.

*Required fields