If your furnace won’t ignite, the source of the issue may be a broken flame sensor. The sensor is responsible for turning off the gas burners to avoid gas buildup. Once this component starts to malfunction, it may stop the burners from igniting altogether.
Why is my furnace running but not igniting?
If your gas furnace initiates the start cycle but does not fire up, it’s likely because of a faulty, damaged, or dirty ignitor/sensor. This is a very common furnace problem—you can try to clean the sensor and replace the ignitor.
How do I get my furnace to ignite?
Once the gas has had time to dissipate, turn the knob to “Pilot.” Then, hold down the “Reset” button and bring the flame of a long lighter close to the pilot light opening. This should light the furnace pilot light. Once you are sure the pilot light is on, release your pressure on the reset button.
How do I know if my ignitor is bad on my furnace?
Here are a few indications that you have a faulty ignitor.
- No Cold Air. …
- The Furnace Won’t Come On. …
- The Furnace Suddenly Stops Blowing. …
- Starts, Then Stops, Then Starts Again. …
- Tripping the Breaker More Than Once. …
- I Hear the Click, But Nothing Happens. …
- Flame Sensor Problems. …
- Short Circuit.
How do you reset a furnace ignitor?
To reset the ignition control module on an electronic-ignition furnace, turn down the thermostat or turn off the power switch. Listen for the sound of the spark or watch for the hot surface ignitor to glow. Next, make sure the furnace’s flame sensor is clean.
Can hear your furnace click on but it does not fire up?
You Have a Faulty Ignition Sensor (Pilot Light)
The pilot light or ignition sensor is usually the most common issue when your furnace will not ignite. This is typically the problem if you can hear your furnace click on but it does not fire up.
Can I manually ignite my furnace?
Never attempt to light a furnace by a flame manually, especially if the furnace has an electronic igniter. A furnace equipped with an electronic igniter cannot be lit manually. Call for the services of a professional heating and cooling technician when the igniter is not working properly.
How much does it cost to replace furnace ignitor?
A ballpark figure is approximately $75 to $100. This cost covers only labor. At times, parts and services can go up to $250 to $300. Remember that your unit will not turn on if your furnace igniter malfunctions, despite having just replaced the part.
Can a furnace ignitor be cleaned?
If your furnace has a spark ignitor and it’s working haphazardly, it too could be covered with soot, and a blast of compressed air may be enough to clean it. Compressed air can also clean a blocked pilot tube that is causing the pilot flame to burn weakly or not at all.
How long should it take for a furnace to ignite?
A furnace should take around five minutes to start once you’ve turned on your thermostat. That said, you might end up waiting closer to ten minutes to see your furnace kick on if it’s older or has an issue with its pilot light. If this is the case, it may need to be checked out by a professional.
Why is my furnace not responding to thermostat?
When a furnace is not responding to a thermostat, there is either a problem with the heating unit or the actual thermostat. Lack of power to the thermostat, wrong settings, and outdated software might be to blame, as well as faulty wiring, a tripped breaker, and a dirty furnace filter.
How do you manually reset a furnace?
How to Reset an Electric Furnace
- First, turn off the power supply to the furnace by turning off the breaker in the circuit box.
- Locate the reset button on the furnace and press it to reset the furnace. …
- If the button is popped up, press it down.
- Return the cover to the blower compartment and turn the power on.
How many times can I hit the reset button on my furnace?
twice
Don’t hit “reset” more than twice. The process pumps oil into the burner chamber, where it can accumulate if you have no ignition. Then when the furnace finally does start, it can do so explosively. So if the button won’t reset, or quickly pops up again, it’s time to call a professional repair service.
Why does furnace need to be reset?
The basic purpose of a reset button is to serve as a safety feature. It helps shut down the furnace when the furnace is too hot. This essentially prevents the overheated furnace from triggering the circuit breaker. As noted above, a furnace may need to be reset sometimes, such as when it is too hot.
