Furnace Repair Checklist
1. Examine the Thermostat
To begin, make sure your thermostat is signaling your heater to start.
- Change the batteries if the display is empty. If the digital display is messed up, the thermostat might need to be replaced.
- Ensure the switch is switched to “heat” rather than “off” or “cool.”
- Ensure the program is showing the right day and time and is scheduled to “run.” If you’re having trouble turning off the program, adjust the temperature by using the up/down arrows and holding the “hold” button. This will cause the furnace to turn on if thermostat is causing trouble.
- Increase the temperature setting to 5 degrees above the temperature of the room.
If your heat hasn’t kicked on within a couple minutes, make sure it has juice by moving 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 will be determined by the model you have. Take a look at the manufacturer’s website for help. If you aren’t able to get your Wi-Fi thermostat to function, reach us at 724-425-5852 for heating and cooling service.
2. Check Breakers and Switches
Next, confirm your breaker and furnace switch are on.
- Locate your main electrical panel. If you aren’t sure where it is, keep an eye out for a metallic metal box in your basement, garage or closet.
- Ensure your hands and feet are dry before opening the panel or breakers.
- Look for the breaker titled “furnace” or “heat,” and make sure it’s turned “on.” If the breaker has tripped, it will be in the middle or “off” area.
- With one hand, steadily switch the breaker to the “on” position. If the breaker immediately trips and pops back to “off,” don't try to reset it and get in touch with a professional from Knoechel Heating Company at 724-425-5852 quickly.
It doesn’t matter how old your furnace is or what brand it is, it has at least one standard wall switch situated on or close to it.
- Make certain the switch is moved up in the “on” placement. If it was turned off, expect your furnace to take up to five minutes to turn on. (If you’re unaware of where to find your furnace, look in your basement, garage or utility closet. It may also be in a crawl space or attic.)
3. Buy a New Air Filter
When we consider heating issues, a dirty, clogged air filter is frequently to blame.
If your filter is too dirty:
- Your heating system won’t stay on, or it may get too warm from restricted airflow.
- Your heating expenses could be higher because your heater is working more often.
- Your heater might fail too soon since a dirty filter causes it to work harder.
- Your furnace might be disconnected from power if an overly dirty filter results in a tripped breaker.
While it depends on what model of furnace you use, your air filter can be found in the interior of the blower compartment of your heater, an attached filter case or wall-mounted return air grille.
To replace your filter:
- Switch off your heater.
- Take out the filter and angle it toward the light. If you can’t see light through it, get a new one.
- Put in the new filter with the arrow motioning toward the furnace to prevent damage.
Flat filters ought to be replaced monthly, 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 go more quickly down the road, draw with a permanent pen on your furnace housing or ductwork to list the airflow direction and filter size.
4. Inspect the Condensate Pan
Also known as drain pans, condensate pans hold water your heating system draws from the air.
If liquid is dripping from within your heater or its pan has too much water in it, follow these recommendations.
- If your pan has a drain (look for a PVC pipe), make sure that it isn’t clogged. If it needs to be drained, use a special pan-cleaning tablet you can get at home improvement or hardware shops.
- If your pan has a pump, take a look at the float switch. If the button is stuck “up” with water in the pan, reach us at 724-425-5852, because you will possibly have to buy a new pump.
5. Check for Heater Error Codes
If malfunctions persist, look at your heater’s plastic window to confirm the blower motor’s status. Dependent on the model, the light might also be mounted on the surface of your heating system.
If you notice anything except a solid, colored light or flickering green light, contact us at 724-425-5852 for HVAC service. Your heater may be giving an error code that is calling for specialized service.
6. Clean the Flame Sensor
If your heating system attempts to start but turns off without blowing heated air, a dusty flame sensor can be at fault. When this happens, your heater will try to start three times before a safety device turns it off for about an hour.
If you feel okay with opening up your furnace, gently scrubbing your flame sensor is a job you can do yourself. Or, one of our heating service professionals can do it for you.
If you are fine with cleaning the sensor on your own, you need:
- A 1/4” hex screwdriver or wrench
- Portion of light grit sandpaper, steel wool or emery cloth
- An unused paper towel
- Shut off the heater’s power by using its wall switch or breaker. If your gas valve isn’t electric, you have to shut off the gas along with it.
- Take off the heater’s front panel and follow the wire to the flame sensor.
- Remove the rod and use your sandpaper, steel wool or emery cloth to gently rub the metal rod.
- Clear the rod with a paper towel.
- Put the sensor back in.
- Replace the furnace doors.
- Switch the furnace’s power back on. It might run through a series of examinations before continuing usual running. If your heating system doesn’t start, the sensor may need to be replaced or something else may be wrong. If this occurs, get in touch with us at 724-425-5852 for heating and cooling repair support.
7. Reignite the Pilot Light
If you are using an older heater, the pilot light could be turned off. To light it, look for the steps on a sheet on your furnace, or follow these steps.
- Locate the switch on the bottom of your heater that says “pilot,” “on” and “off.”
- Move the switch to the “off” position.
- Don’t do anything for at least five minutes to prevent starting a fire.
- Turn the switch to “pilot.”
- Hold down the “reset” switch as you push the flame of a long lighter to the pilot light opening.
- Let go of the “reset” button once the pilot light is burning.
If you have followed the guide twice and the pilot light still won’t ignite or stay lit, get in touch with us at 724-425-5852 for furnace service.
Check Your Gas Delivery System
Try using a second gas appliance. If it doesn’t function, your natural gas service could be turned off, or you might have run out of propane.