The most obvious sign that your furnace ignitor is bad is that it won't ignite, and this generally manifests itself in your furnace failing to run when you activate it.
Unplug the ignitor, and pull it out of your furnace. Leave it out for about five minutes, and test it using a multimeter to make sure it has continuity. After five minutes, plug the ignitor back in and turn the power to the furnace back on. If you still have an issue, call in a furnace repair technician.
Defective Igniter or Pilot Light
If it clicks but your furnace won't ignite after the combustion cycle, the electronic ignition systems probably need to be replaced. In cases where the furnace ignition starts normally but only stays on for a few minutes and then goes out, a new pilot light likely needs to be installed.
The igniter glows red and then lights the burners in the gas furnace. Over time, the igniter is continually getting red hot and then cooling, creating stress on the element. Because of this, igniters have a 3-5 year life expectancy. They will eventually crack and need to be replaced.
You can reset the ignition on your furnace simply. To do this you must cut the power to the furnace first by turning off the circuit that powers it. Once the power is off you can remove the burner door to reveal the ignitor. Turn this to “off” and leave it off for at least 5 minutes.
Can you DIY a furnace ignitor replacement? In short, yes, you can DIY a hot-surface ignitor replacement. It shouldn't be too difficult if you have experience fixing things around the house. However, if you typically feel clueless about troubleshooting household appliances, this may not be the right job for you.
Checking your thermostat is the best place to start. Make sure it's set to “heat” and that you've set the temperature higher than the current room temperature. If that doesn't resolve the problem, try switching your fan to “on” to force the furnace to start working.
Furnace ignitor cost
A furnace ignitor replacement costs $100 to $250 on average. Most universal hot-surface ignitor prices are $15 to $35 for the part alone. Gas furnace ignitor prices are $20 to $100 for parts from the original manufacturer (OEM). The labor cost to replace a heater ignitor is $80 to $200.
Most likely, your furnace is making a clicking noise and not providing heat because your furnace's spark igniter is trying to ignite your pilot light or burners but is failing to do so. In other words, there's an ignition system malfunction that needs to be fixed. Otherwise, your furnace won't start.
Remove the ignitor carefully by holding only the base. Avoid touching the ignitor surface with bare hands. Use compressed air to remove carbon deposits. Gently wipe the surface with a soft cloth or scuff pad until shiny.
For instance, the flame sensor is on the left side, while the ignitor is located on the right side of the burners. When the burners produce a flame, the rod-shaped protrusion detects it and sends an electrical signal to the furnace's control board, signifying that everything is functioning correctly.
The confusion regarding their usage arises from regional spelling preferences and variations. In contemporary usage, “igniter” is generally the preferred and more widely accepted term, particularly in American English. Conversely, “ignitor” may still be found in older literature or specific regional contexts.
So, if your furnace is failing to ignite, it's a good idea to check the air filter. If it looks clogged up, then this is probably the source of the problem. Change the air filter and see if your ignitor will then begin to work again. If not, then this isn't the cause of the issue.
The Short Answer Is: Warning signs of a bad furnace ignitor include the furnace not starting or heating, a noticeable clicking sound without ignition, or frequent short cycling where the furnace turns on and off rapidly. Additionally, if the ignitor appears cracked or discolored, it may need replacement.
Several factors can lead to ignitor troubleshooting and potential replacement. Understanding these causes can help you prevent future issues and extend the life of your ignitor. Common causes of ignitor failure include: Age and wear: Ignitors typically last three to five years before needing replacement.
You might not think that a dirty filter could cause an issue, but it's often the culprit for furnace ignition failure.
Follow these steps to fix a gas furnace that won't ignite: Ensure the furnace filter is clean — if not, replace the dirty filter with a clean one. Also, check that the power to the furnace is on. Last, make sure the gas supply to the furnace is open.
The first motor to come on will be the inducer motor.
Not a large motor by any means, but it's the one that gets rid of the fumes spent by the flame that warms your home. The control board and a pressure switch acknowledge that the inducer has come on and is working properly.
Most modern gas furnaces can be reset by turning off the power, waiting around 20 seconds, then switching the power back on. Other furnace models may exit lockout after 1-2 hours and attempt to power on again.
Take an old part, as well as its mounting holes and electrical connector, with you. This part should cost between $25 and $50, which is still much less than a maintenance contract. We can agree that a furnace ignitor replacement is a tricky task and can take up an entire day if you are a novice.
Electronic ignition makes furnaces more efficient
Electronic ignition is a device that replaces conventional pilot lights in almost all newly manufactured furnaces. There are two types of electronic ignitions: a hot surface ignition and an intermittent pilot.
Today's furnaces rely on electronic ignitors. These systems can be divided into two groups: pilot systems that are intermittent or ignition systems that rely on a hot surface. A spark in the intermittent pilot system turns on the pilot light, as opposed to the old pilot light that burned continually.