furnace repair

Anaheim is Getting Cold, but My Furnace Wont Turn On

Troubleshooting your furnace might feel like a daunting task when your heat won’t turn on. But it doesn’t have to be like that.

There are a couple of quick, low-cost fixes you can do yourself to avoid 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 calling an HVAC professional.

If you find you need help from an expert and live in Anaheim, Eco Fresh HVAC Inc. can provide assistance to you. We repair most brands of heating systems.

If it’s time for a new heating system, we also provide furnace replacement in Anaheim.

While you’re chatting with us, think over an annual furnace maintenance plan from Eco Fresh HVAC Inc. that may help you avoid repairs in the future. We can tell you how frequently your furnace should be examined by one of our NATE-certified experts.

Follow our easy guide below to get to work on troubleshooting your furnace. Most of these steps don’t require mechanical know-how.

Steps for Furnace Troubleshooting

Check the Thermostat

To begin, make sure your thermostat is instructing your furnace to turn on.

If you have a digital thermostat:

  • Replace 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” as opposed to “off” or “cool.”
  • Ensure the program is displaying 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 started 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 furnace might not have power.

If you have a smart thermostat—like one made by Nest, Ecobee, Lux, Honeywell or Bosch—troubleshooting is very model-specific. Take a look at 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 aren’t sure 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.
  • Look for 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,” leave it alone and contact a professional from Eco Fresh HVAC Inc. at 714-855-1717 right away.

Regardless of your furnace’s age or brand, 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 turn on. (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 problems, a dirty, clogged air filter is often the top offender.

If your filter is too dirty:

  • Your furnace won’t keep heating your home, or it could overheat from limited airflow.
  • Your energy bills could go up because your furnace is turning on more than it should.
  • Your furnace could fail sooner than it should because a dirty filter causes it to work overtime.
  • Your furnace can lose power if an extremely dirty filter causes the breaker to trip.

Depending on what make of furnace you own, your air filter can be found 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 hold it up to the light. If you can’t see light through it, use a new one.
  • Put in the new filter with the arrow pointing toward the furnace to avoid damage.

Flat filters should be replaced every month, 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 often.

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

Examine the Condensate Pan

Also known as drain pans, condensate pans hold 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, inspect the float switch. If the switch is stuck “up” with liquid in the pan, contact Eco Fresh HVAC Inc. at 714-855-1717, because you will probably need a new pump.

Peek Inside Your Furnace

If malfunctions continue, peek inside your furnace’s plastic window to check 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 else besides a steady, colored light or blinking green light, call Eco Fresh HVAC Inc. at 714-855-1717. Your furnace may be giving an error code that requires professional assistance.

Clean the Flame Sensor

If your furnace tries to start but turns off without blowing heat, a dirty flame sensor could be responsible. When this occurs, your furnace will make an attempt to start three times before a safety feature turns it off 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 experts at Eco Fresh HVAC Inc. 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:

  • Turn off 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 sequence of checks before proceeding with regular operation. If your furnace doesn’t turn on, the sensor may need to be replaced or something else could be wrong. If this happens, contact Eco Fresh HVAC Inc. at 714-855-1717 for assistance.

Relight the Pilot Light

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

  • Locate 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 starting 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, get in touch with Eco Fresh HVAC Inc. at 714-855-1717.

Check Your Fuel Source

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

Eco Fresh HVAC Inc. Can Help with Furnace Problems

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

Call us today at 714-855-1717 or use our online scheduler. We’ll come out and pinpoint the problem.

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