Furnace Repair Checklist
1. Examine the Thermostat
To start, ensure your thermostat is instructing your furnace to turn on.
- Change the batteries if the screen is not displaying anything. If the digital display is messed up, the thermostat could need to be replaced.
- Ensure the control is set to “heat” instead of “off” or “cool.”
- Make sure the program is showing the appropriate day and time and is programmed to “run.” If you’re having a hard time overriding the program, set the temperature by utilizing the up/down arrows and holding the “hold” button. This will cause the furnace to start if thermostat is causing a problem.
- Set the temperature setting to 5 degrees hotter than what the room temperature currently is.
If your heating hasn’t started within a few minutes, make sure it has electricity by changing the fan switch from “auto” to “on.” If the fan doesn’t start, your heating system could be without power.
If you have a smart thermostat—for example one manufactured by Nest, Ecobee, Lux, Honeywell or Bosch—troubleshooting will depend on your model. Check the manufacturer’s website for support. If you aren’t able to get your Wi-Fi thermostat to function, reach us at 507-218-0088 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 aren’t sure where it is, search for a gray metal box in your basement, garage or closet.
- Make sure your hands and feet are dry in advance of opening the panel or breakers.
- Look for the breaker titled “furnace” or “heat,” and make sure it’s turned “on.” If you find that the breaker tripped, it will be in the middle or “off” position.
- With one hand, steadily switch the breaker to the “on” position. If the breaker trips right away and pops back to “off,” don't try to reset it and get in touch with a team member from Brogan Heating & AC Inc at 507-218-0088 immediately.
No matter your furnace’s age or brand, it has no less than one ordinary wall switch located on or near it.
- Make certain the switch is flipped up in the “on” spot. If it was shut off, anticipate your furnace could take up to five minutes to turn on. (If you’re unsure where to find your furnace, check your basement, garage or utility closet. It can also be in a crawl space or attic.)
3. Buy a New Air Filter
When we consider heater problems, a filthy, full air filter is often to blame.
If your filter is too dusty:
- Your heat won’t keep heating your home, or it may overheat from restricted airflow.
- Your gas costs could go up because your furnace is turning on too often.
- Your heater might break down prematurely due to the fact a filthy filter triggers it to overwork.
- Your furnace might be cut off from power if an excessively filthy filter is the cause of a tripped breaker.
Based on what make of heater you use, your air filter will be within the blower compartment of your heating system, an attached filter case or wall-mounted return air grille.
To swap out your filter:
- Turn off your heating system.
- Take out the filter and angle it toward the light. If you can’t see light through it, replace it.
- Put in the new filter with the arrow pointing toward the furnace to keep damage from happening.
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 often.
To make the procedure smoother in the future, write with a permanent pen on your furnace exterior or ductwork to indicate the airflow direction and filter size.
4. Check the Condensate Pan
Also known as drain pans, condensate pans catch moisture your heating system draws from the air.
If moisture is leaking from your heating system or its pan has standing water in it, use these steps.
- If your pan includes a drain (look for a PVC pipe), double-check that it’s clear. If it should be drained, drop in a special pan-cleaning tablet you can purchase at home improvement or hardware retailers.
- If your pan uses a pump, take a look at the float switch. If the lever is jammed “up” with standing water in the pan, call us at 507-218-0088, because you will likely have to buy a new pump.
5. Look for Furnace Error Codes
If malfunctions keep on happening, peek at your heater’s plastic window to confirm the blower motor’s status. Depending on the brand, the light may also be mounted on the outside of your furnace.
If you note anything except a steady, colored light or twinkling green light, contact us at 507-218-0088 for HVAC service. Your heating system could be emitting an error code that requires expert assistance.
6. Brush off the Flame Sensor
If your heating system attempts to start but shuts off without blowing heated air, a grimy flame sensor might be at fault. When this takes place, your heater will attempt to turn on three times before a safety mechanism powers it down for about an hour.
If you feel confident with removing the panels from your furnace, brushing off your flame sensor is work you are able to do on your own. Or, one of our heating service professionals can do it for you.
If you are fine with cleaning the sensor yourself, you should have:
- A 1/4” hex screwdriver or wrench
- Portion 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 your furnace’s gas valve isn’t electric, you must switch off the gas in addition.
- Lift off the heating system’s front panel and trace the wire to the flame sensor.
- Take off the rod and use your sandpaper, steel wool or emery cloth to carefully rub the metal rod.
- Wipe off the rod with a paper towel.
- Screw the sensor back in.
- Secure the furnace doors.
- Restore power to the furnace. It may run through a series of tests before continuing regular operation. If your furnace doesn’t start, the sensor may have to be replaced or something else might be causing a problem. If this occurs, call us at 507-218-0088 for heating and cooling repair support.
7. Relight the Pilot Light
If you are using an aging heater, the pilot light could be extinguished. To light it, find the instructions on a label on your furnace, or follow these steps.
- Look for the switch below your heater that says “pilot,” “on” and “off.”
- Turn the switch to the “off” position.
- Wait at least five minutes to avoid sparking a fire.
- Turn the dial to “pilot.”
- Press the “reset” lever as you push the flame of a long lighter to the pilot light opening.
- Depress the “reset” switch once the pilot light is burning.
If you have followed the guide twice and the pilot light still won’t ignite or stay burning, get in touch with us at 507-218-0088 for furnace service.
Inspect Your Gas Source
Try turning on another gas appliance. If it doesn’t function, your natural gas delivery might be switched off, or you may have run out of propane.