When your furnace won’t start, doing your own furnace repair in Chadron, Nebraska, can feel pretty overwhelming.
Troubleshooting your furnace might feel like an overwhelming job when your heat won’t start. But it doesn’t have to be like that.
There are a number of time-saving, 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 contacting an HVAC professional.
If you find you need help from a heating and cooling pro and live in Chadron, MPC Heating & Cooling can provide assistance to you. We can repair most makes of heating systems and also provide emergency furnace repair.
If you’re ready for a new heating system, we also do furnace installation.
While you’re talking with us, consider an annual furnace maintenance plan that may help you avoid breakdowns in the future. We can tell you how regularly your furnace should be checked by one of our certified professionals.
Follow our easy guide below to get started on troubleshooting your furnace. Most of these steps don’t require mechanical know-how.
Furnace Repair Checklist
1. Check the Thermostat
First, make sure your thermostat is telling your furnace to start.
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” instead of “off” or “cool.”
Ensure the program is set to the right day and time and is set to “run.” If you’re having trouble 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 a problem.
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. Refer to the manufacturer’s website for help. If you still can’t get your Wi-Fi thermostat to work, call us at 308-832-4321 for heating and cooling service.
2. 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 touch it and get in touch with a professional from MPC Heating & Cooling at 308-832-4321 right away.
Regardless of your furnace’s age or brand, it has at least one standard wall switch located on or close to 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.)
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 reduced airflow.
- Your energy bills could go up because your furnace is turning on too often.
- Your furnace could fail too soon because a dirty filter causes it to work harder.
- 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.
- Take out the filter and tilt it toward the light. If you can’t see light through it, use a new one.
- Add 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 buy 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 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
Otherwise known as drain pans, condensate pans capture water your furnace removes 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’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 has a pump, inspect the float switch. If the switch is stuck “up” with standing water in the pan, contact us at 308-832-4321, because you will possibly need a new pump.
5. Check for Furnace Error Codes
If malfunctions continue, peek inside your furnace’s plastic window to verify the status of the blower motor. Depending on the model, the light could also be fixed on the outside of your furnace.
If you see anything else besides a steady, colored light or blinking green light, call us at 308-832-4321 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 switches off without distributing heat, a dirty flame sensor could be at fault. When this occurs, your furnace will try to turn on three times before a safety feature shuts it down 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:
- Shut 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.
- Remove 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 might run through a sequence of checks before resuming usual operation. If your furnace doesn’t turn on, the sensor may need to be replaced or something else may be wrong. If this happens, get in touch with us at 308-832-4321 for heating and cooling repair assistance.
7. Relight the Pilot Light
If you are using 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.
- 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 us at 308-832-4321 for furnace service.
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.
We Can Help with HVAC Repair
Followed our troubleshooting guide but your furnace still won’t work?
Call us today at 308-832-4321 or contact us online. We’ll come out and figure out the problem.