Furnace Repair Checklist
1. Look at the Thermostat
To start, ensure your thermostat is telling your heater to turn on.
- Change the batteries if the screen is empty. If the digital screen is jumbled, the thermostat could need to be swapped out.
- Ensure the control is set to “heat” as opposed to “off” or “cool.”
- Make sure the program is showing the appropriate day and time and is programmed to “run.” If you’re having problems turning off the program, adjust the temperature by utilizing the up/down arrows and holding the “hold” button. This will cause the furnace to ignite if thermostat is causing trouble.
- Set the temperature setting to 5 degrees above the room temperature.
If your furnace hasn’t kicked on within a couple minutes, make certain that it has juice by switching the fan switch from “auto” to “on.” If the fan doesn’t start, your furnace could be without power.
If you have a smart thermostat—for example one manufactured by Nest, Ecobee, Lux, Honeywell or Bosch—troubleshooting is very model-specific. Check the manufacturer’s website for support. If you aren’t able to get your Wi-Fi thermostat to function, contact us at 262-358-9468 for heating and cooling service.
2. Examine 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, look for a gray metal box in your basement, garage or closet.
- Make sure your hands and feet aren’t moist before opening the panel or breakers.
- Look for the breaker marked “furnace” or “heat,” and ensure it’s reading “on.” If the breaker has tripped, it will be in the middle or “off” spot.
- Using one hand, steadily turn 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 team member from Keystone Heating & Air Conditioning Co., Inc at 262-358-9468 immediately.
It doesn’t matter how old your furnace is or what brand it is, it has no less than one ordinary wall switch located on or close to it.
- Make sure the lever is facing up in the “on” spot. If it was shut off, it could take your furnace up to five minutes to ignite. (If you’re unaware of where to locate your furnace, take a look at your basement, garage or utility closet. It could also be in a crawl space or attic.)
3. Get a New Air Filter
When we consider heating issues, a grungy, blocked air filter is regularly the top culprit.
If your filter is too dirty:
- Your heat won’t keep heating your home, or it may overheat from reduced airflow.
- Your heating costs may go up because your heat is operating more often.
- Your heater could fail sooner than it should because a filthy filter forces it to work harder.
- Your heater might be cut off from power if an excessively filthy filter results in a tripped breaker.
Based on what make of heating system you have, your air filter can be found inside the blower compartment of your furnace, an attached filter case or wall-mounted return air grille.
To put in a new filter:
- Switch off your heater.
- Pull out the filter and tilt it toward the light. If you can’t view light through it, use a new one.
- Insert the new filter with the arrow facing toward the heater to prevent damage.
Flat filters ought to be replaced once a month, while pleated filters should last about three months. If you have children or pets, you might have to change your filter sooner.
To make changing your filter smoother down the road, use a permanent writing tool on your heating system exterior or ductwork to list the airflow direction and filter size.
4. Examine the Condensate Pan
Commonly known as drain pans, condensate pans capture moisture your heating system draws from the air.
If moisture is leaking from within your heating system or its pan has too much water in it, follow these recommendations.
- If your pan includes 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 get at home improvement or hardware shops.
- If your pan contains a pump, take a look at the float switch. If the switch can’t be moved from the “up” position with liquid in the pan, contact us at 262-358-9468, because you will possibly have to install a new pump.
5. Look for Heating Error Codes
If failures persist, take a look at your furnace’s plastic window to check the blower motor’s status. Dependent on the brand, the light may also be attached on the outside of your furnace.
If you see anything else besides a solid, colored light or twinkling green light, contact us at 262-358-9468 for HVAC service. Your furnace might be giving an error code that requires specialized service.
6. Scrub the Flame Sensor
If your heater tries to run but switches off without blowing heated air, a filthy flame sensor can be at fault. When this occurs, your heater will attempt to turn on three times before a safety feature powers it down for about an hour.
If you feel okay with taking the panels off your heater, gently scrubbing your flame sensor is work you are able to do personally. Or, one of our heating service experts has the ability to do it for you.
If you want to clean the sensor on your own, you require:
- A 1/4” hex screwdriver or wrench
- Bit of light grit sandpaper, steel wool or emery cloth
- A fresh paper towel
As the next step:
- Disable the furnace’s power by using its wall switch or breaker. If you don’t have an electric gas valve, you have to turn off the gas along with it.
- Lift off the furnace’s front panel and track the wire to the flame sensor.
- Take off the rod and use your sandpaper, steel wool or emery cloth to gently rub the metal rod.
- Clear the rod with a paper towel.
- Screw the sensor back in.
- Put the furnace doors back on.
- Switch the furnace’s power back on. It might go through a set of inspections before resuming regular operation. If your heating system doesn’t start, the sensor could need to be replaced or something else might be causing a problem. If this occurs, call us at 262-358-9468 for heating and cooling repair assistance.
7. Light the Pilot Light
If you have an aging heater, the pilot light could be out. To reignite it, locate the directions on a sheet on your furnace, or use these steps.
- Look for the toggle on the bottom of your heating system marked “pilot,” “on” and “off.”
- Push the switch to the “off” position.
- Don’t do anything for at least five minutes to avoid creating a fire.
- Turn the knob to “pilot.”
- Push the “reset” lever as you bring the flame of a long lighter to the pilot light opening.
- Release the “reset” switch once the pilot light is ignited.
If you have followed the guide twice and the pilot light still won’t light or stay lit, contact us at 262-358-9468 for furnace service.
Examine Your Fuel Supply
Try using a second gas appliance. If it doesn’t work, your natural gas service may be shut off, or you could be out of propane.