Furnace Repair Checklist
1. Inspect the Thermostat
To begin, ensure your thermostat is telling your heater to start.
- Swap out the batteries if the screen is blank. If the digital screen is jumbled, the thermostat might need to be replaced.
- Make certain that the button is switched to “heat” as opposed to “off” or “cool.”
- Make sure the program is showing the right day and time and is programmed to “run.” If you’re having problems turning off the setting, adjust the temperature with the up/down arrows and pressing the “hold” button. This will cause the furnace to turn on if thermostat is causing trouble.
- Turn the temperature setting to 5 degrees above the room temperature.
If your heat hasn’t started within a couple minutes, make certain that it has juice by changing the fan switch from “auto” to “on.” If the fan doesn’t begin to run, your heating system 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 support. If you aren’t able to get your Wi-Fi thermostat to function, reach us at 704-233-7363 for heating and cooling service.
2. Check Breakers and Switches
Next, check if your breaker and furnace switch are on.
- Locate your main electrical panel. If you don’t know where it is, search for a metallic metal box in your basement, garage or closet.
- Ensure your hands and feet aren’t wet prior to opening the panel or breakers.
- Look for the breaker titled “furnace” or “heat,” and ensure it’s moved to “on.” If you discover a tripped breaker, it will be in the middle or “off” area.
- With one hand, quickly turn the breaker to the “on” position. If the breaker instantly trips and pops back to “off,” don't try to reset it and get in touch with a professional from Hopper Heating and Air at 704-233-7363 immediately.
Regardless of your furnace’s age or brand, it has at least one standard wall switch set on or close to it.
- Make certain the lever is facing up in the “on” spot. If it was turned off, anticipate your furnace could take up to five minutes to start. (If you’re unsure where to locate your furnace, check your basement, garage or utility closet. It can also be in a crawl space or attic.)
3. Replace the Air Filter
When it comes to furnace problems, a dirty, full air filter is often to blame.
If your filter is too dusty:
- Your furnace won’t stay on, or it could overheat from restricted airflow.
- Your heating costs may go up because your furnace is operating more often.
- Your heating system might stop working prematurely due to the fact a dusty filter triggers it to work harder.
- Your heater may be cut off from power if an overly filthy filter results in a tripped breaker.
Based on what make of furnace you have, your air filter will be in the interior of the blower compartment of your heating system, an attached filter case or wall-mounted return air grille.
To replace your filter:
- Switch off your heating system.
- Take out the filter and tilt it toward the light. If you can’t view light through it, get a new one.
- Install the new filter with the arrow facing toward the furnace to keep damage from happening.
Flat filters ought to be replaced every month, while pleated filters should last about three months. If you have children or pets, you could have to change your filter more frequently.
To make changing your filter easier in the future, write with a permanent marker on your furnace housing or ductwork to list the airflow direction and filter size.
4. Look at the Condensate Pan
Also known as drain pans, condensate pans capture water your heater removes from the air.
If liquid is dripping out of your heater or its pan has standing water in it, use these steps.
- If your pan has a drain (look for a PVC pipe), make sure that it isn’t clogged. If it requires draining, drop in a special pan-cleaning tablet you can buy at home improvement or hardware shops.
- If your pan contains a pump, take a look at the float switch. If the lever is jammed “up” with standing water in the pan, contact us at 704-233-7363, because you will likely need a new pump.
5. Watch for Heater Error Codes
If faults keep on happening, look inside your furnace’s plastic window to check the blower motor’s status. Dependent on the model, the light may also be mounted on the outside of your furnace.
If you note anything other than a solid, colored light or blinking green light, contact us at 704-233-7363 for HVAC service. Your heater could be emitting an error code that requires professional help.
6. Clean the Flame Sensor
If your heater tries to work but switches off without blowing heat, a filthy flame sensor might be at fault. When this takes place, your heating system will attempt to ignite three times before a safety device turns it off for about an hour.
If you feel comfortable with taking the panels off your heating system, brushing off your flame sensor is something you have the ability to do on your own. Or, one of our heating service professionals has the ability to complete it for you.
If you want to clean the sensor on your own, you need:
- A 1/4” hex screwdriver or wrench
- Section of light grit sandpaper, steel wool or emery cloth
- A dry, clean paper towel
As the next step:
- Disable the heating system’s power with its wall switch or breaker. If your gas valve isn’t electric, you must turn off the gas as well.
- Take off the heater’s front panel and track the wire to the flame sensor.
- Remove the rod and use your sandpaper, steel wool or emery cloth to gently clean the metal rod.
- Clear the rod with a paper towel.
- Remount the sensor.
- Replace the furnace doors.
- Switch the furnace’s power back on. It may go through a sequence of examinations before proceeding with normal heating. If your furnace doesn’t start, the sensor may need to be replaced or something else may be causing a problem. If this takes place, contact us at 704-233-7363 for heating and cooling repair help.
7. Light the Pilot Light
If you have an aging heating system, the pilot light could be turned off. To light it, look for the guide on a label on your heating system, or try these recommendations.
- Locate the toggle on the bottom of your furnace labeled “pilot,” “on” and “off.”
- Push the switch to the “off” position.
- Take a break for at least five minutes to limit the possibility for starting a fire.
- Move the dial to “pilot.”
- Press the “reset” switch as you push the flame of a long lighter to the pilot light opening.
- Release the “reset” lever once the pilot light is lit.
If you have followed the instructions twice and the pilot light still won’t light or keep lit, get in touch with us at 704-233-7363 for furnace service.
Double-Check Your Fuel Delivery System
Try switching on an additional gas appliance. If it doesn’t operate, your natural gas delivery may be turned off, or you might have run out of propane.