When your furnace won’t start, doing your own furnace repair in Temple/Belton , Texas, can feel pretty overwhelming.
Fixing your furnace might feel like an overwhelming undertaking when your heat won’t power on. But it doesn’t have to be like that.
There are a number of speedy, low-cost fixes you can do yourself to skip 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 getting in touch with an HVAC professional.
If you find you need help from a heating and cooling pro and live in Temple/Belton , Bell Air Conditioning Inc can provide assistance to you. We can repair most brands of heating systems and also provide emergency furnace repair.
If it’s time for a new heating system, we also provide furnace installation.
While you’re in touch with us, consider a routine furnace maintenance plan that might help you avoid repairs in the future. We can tell you how regularly your furnace should be examined by one of our certified professionals.
Follow our easy guide below to get to work on troubleshooting your furnace. Most of these steps don’t require mechanical skills.
Furnace Repair Checklist
1. Check the Thermostat
To begin, make sure your thermostat is instructing your furnace to turn on.
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” as opposed to “off” or “cool.”
Ensure the program is set to the right day and time and is set to “run.” If you’re having a hard time 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.
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 begin to run, your furnace could be without power.
Smart Thermostat
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, call us at 254-307-9572 for heating and cooling service.
2. Examine Breakers and Switches
Next, you will need to check if your breaker and furnace switch are on.
Find your house’s main electrical panel. If you have no idea 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.
Locate 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 touch it and contact a professional from Bell Air Conditioning Inc at 254-307-9572 right away.
Regardless of your furnace’s age or brand, it has at least one standard wall switch located on or by it.
Make sure the switch is flipped up in the “on” position. If it was turned off, expect your furnace to take up to five minutes to turn on. (If you don’t know where to find your furnace, take a look at your basement, garage or utility closet. It could also be in a crawl space or attic.)
3. Replace the Air Filter
When it comes to furnace problems, a filthy, clogged air filter is regularly the top culprit.
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 be higher because your furnace is turning on too often.
- Your furnace could stop working too soon because a dirty filter causes it to overwork.
- Your furnace can be cut off from power if an excessively dirty filter causes the breaker to trip.
Depending on what model of furnace you use, your air filter is located inside the blower compartment of your furnace, an attached filter case or wall-mounted return air grille.
To replace your filter:
- Turn off your furnace.
- Remove the filter and hold it up to the light. If you can’t see light through it, get a new one.
- Put in the new filter with the arrow pointing toward the furnace to avoid damage.
Flat filters should be replaced once a month, while pleated filters should last about three months. You can also buy 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 indicate the airflow direction and filter size.
4. Inspect the Condensate Pan
Also known as drain pans, condensate pans catch water your furnace pulls from the air.
If water is leaking 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’s clear. If it needs to be drained, use a special pan-cleaning tablet you can purchase 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 us at 254-307-9572, because you will probably need a new pump.
5. Check for Furnace Error Codes
If malfunctions keep on happening, 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 except a steady, colored light or blinking green light, call us at 254-307-9572 for HVAC service. Your furnace may be communicating an error code that requires professional help.
6. Clean the Flame Sensor
If your furnace tries to start but shuts off without putting out heat, a dirty flame sensor could be responsible. When this occurs, your furnace will try to ignite 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 by yourself. Or, one of our heating service specialists 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 follow the wire to the flame sensor.
- Unscrew the rod and use your sandpaper, steel wool or emery cloth to lightly 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 run through a sequence of checks before continuing usual operation. If your furnace doesn’t start, the sensor may need to be replaced or something else may be wrong. If this happens, contact us at 254-307-9572 for heating and cooling repair assistance.
7. Relight the Pilot Light
If you are using an older furnace, the pilot light could be extinguished. 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 creating 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, call us at 254-307-9572 for furnace service.
Check Your Fuel Source
Try using another gas appliance. If it doesn’t work, your natural gas service could be turned off, or you could be out of propane.
We Can Help with HVAC Repair
Followed our troubleshooting guide but your furnace still won’t work?
Call us today at 254-307-9572 or contact us online. We’ll come out and figure out the problem.