Furnace Repair Checklist
1. Check the Thermostat
First, make sure your thermostat is signaling your furnace to ignite.
- Swap out the batteries if the display is blank. If the digital screen is mixed up, the thermostat could need to be swapped out.
- Make sure the button is set to “heat” as opposed to “off” or “cool.”
- Ensure the program is displaying the right day and time and is set to “run.” If you’re having trouble overriding the program, adjust the temperature by using 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 warmer than what the room temperature currently is.
If your heat hasn’t turned on within several minutes, ensure it has juice by toggling the fan switch from “auto” to “on.” If the fan doesn’t begin to run, your heater might not have power.
If you use a smart thermostat—like one made by Nest, Ecobee, Lux, Honeywell or Bosch—troubleshooting will be determined by the model you have. Refer to the manufacturer’s website for support. If you’re still unable to get your Wi-Fi thermostat to work, reach us at 432-237-0168 for heating and cooling service.
2. Inspect Breakers and Switches
Next, confirm your breaker and furnace switch are on.
- Look for your main electrical panel. If you don’t know where it is, search for a gray metal box in your basement, garage or closet.
- Make certain that your hands and feet aren’t wet prior to opening the panel or breakers.
- Locate the breaker titled “furnace” or “heat,” and make sure it’s switched “on.” If you discover a tripped breaker, it will be in the middle or “off” area.
- Using 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 Redhawk Heating & Air Conditioning at 432-237-0168 right away.
It doesn’t matter how old your furnace is or what brand it is, it has at minimum one ordinary wall switch positioned on or near it.
- Make sure the switch is moved up in the “on” position. If it was shut off, anticipate your furnace could take up to five minutes to ignite. (If you’re unsure where to locate your furnace, check your basement, garage or utility closet. It may also be in a crawl space or attic.)
3. Replace the Air Filter
When it comes to heater breakdowns, a dirty, blocked air filter is often the top offender.
If your filter is too grungy:
- Your heating system won’t stay on, or it might get too warm from restricted airflow.
- Your energy bills could increase because your heat is working more often.
- Your heater could break down too soon since a dusty filter causes it to overwork.
- Your heating system may lose power if an excessively clogged filter results in a tripped breaker.
Depending on what model of furnace you own, your air filter will be inside the blower compartment of your heater, an attached filter case or wall-mounted return air grille.
To put in a new filter:
- Turn off your furnace.
- Remove the filter and angle it toward the light. If you can’t see light through it, get a new one.
- Install the new filter with the arrow facing toward the heater to prevent damage.
Flat filters should be replaced once a month, while pleated filters should last about three months. If you have children or pets, you could have to put in a new 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. Examine the Condensate Pan
Otherwise known as drain pans, condensate pans hold water your heating system draws from the air.
If water is leaking from within your furnace or its pan is overflowing, follow these recommendations.
- If your pan contains a drain (look for a PVC pipe), double-check that it’s clear. If it needs to be drained, drop in a special pan-cleaning tablet you can get at home improvement or hardware retailers.
- If your pan has a pump, check the float switch. If the lever can’t be moved from the “up” position with standing water in the pan, reach us at 432-237-0168, because you will possibly need a new pump.
5. Look for Heater Error Codes
If faults keep on happening, look within your heater’s plastic window to confirm the blower motor’s status. Depending on the model, the light may also be mounted on the exterior of your heating system.
If you notice anything else besides a steady, colored light or twinkling green light, call us at 432-237-0168 for HVAC service. Your heater might be emitting an error code that requires specialized help.
6. Scrub the Flame Sensor
If your heating system tries to run but turns off without distributing heated air, a dirty flame sensor might be responsible. When this happens, your heating system will attempt to turn on three times before a safety feature powers it down for about an hour.
If you feel confident with removing the panels from your heater, cleaning your flame sensor is work you are able to do yourself. Or, one of our heating service specialists can do it for you.
If you are confident cleaning the sensor personally, you require:
- A 1/4” hex screwdriver or wrench
- Section of light grit sandpaper, steel wool or emery cloth
- An unused paper towel
- Disable the heater’s power with its wall switch or breaker. If you don’t have an electric gas valve, you must shut off the gas along with it.
- Remove the heater’s front panel and trace the wire to the flame sensor.
- Remove the rod and use your sandpaper, steel wool or emery cloth to carefully rub the metal rod.
- Clear the rod with a paper towel.
- Put the sensor back in.
- Put the furnace doors back on.
- Restore power to the furnace. It could go through a sequence of inspections before continuing usual heating. If your heater doesn’t start, the sensor could require replacement or something else might be causing a problem. If this takes place, contact us at 432-237-0168 for heating and cooling repair assistance.
7. Relight the Pilot Light
If you own an aging furnace, the pilot light could be turned off. To relight it, find the guide on a sticker on your heater, or use these recommendations.
- Look for the toggle beneath your heater marked “pilot,” “on” and “off.”
- Push the switch to the “off” position.
- Take a break for at least five minutes to prevent starting a fire.
- Push the dial to “pilot.”
- Press the “reset” button as you bring the flame of a long lighter to the pilot light opening.
- Depress the “reset” button once the pilot light is burning.
If you have tried the list twice and the pilot light still won’t ignite or stay ignited, call us at 432-237-0168 for furnace service.
Double-Check Your Gas Delivery System
Try using another gas appliance. If it doesn’t work, your natural gas source may be turned off, or you may have run out of propane.