Soak the sealed burner base in vinegar or warm water and use a stiff brush to remove any debris. Finally, clean any remaining debris out of the burner holes with a toothpick, sewing needle or compressed air. Reinstall the burner, cover and the grill, and try igniting the burner once more.
Usually the igniter sparks across a gap between the igniter and another metal part like the metal ring. If the gap is too big, the spark will be too weak to ignite or won't spark at all. Often the igniter slips down into the stove making the gap too wide. Try pulling up and fiddling with the igniter placement.
Use a toothbrush and clean the burner bases completely and dry them if they are wet with a hair dryer until they are completely drain. Next, sand the tip of the spark igniter with fine sand paper until it shines again. Now place the cap back on the burner and make sure it's seated flush. Try the burner again.
If it doesn't click, then the wires may not be connected properly, the battery may be dead or installed incorrectly, or the igniter module may have failed.
Loose or Faulty Electrodes
Another reason why your burners won't turn on is because of the electrodes or igniters. They produce a spark that ignites the gas, leading to that familiar blue flame. If the electrodes are loose, damaged, or covered in debris, they might not produce a spark, and your burner won't light.
If you're experiencing this, it's likely due to a bad connection or a malfunctioning switch. You can try replacing the burner or calling a technician to check out the problem.
Reset The Furnace Ignitor
Find the burner door on the furnace and look behind it to find the ignitor. Turn it to “OFF” and wait for five minutes. After you wait, turn it back on and return the door to the burner. It is important to make sure the switch on the door is properly engaged.
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.
Common causes include gas leaks, faulty ignition systems, clogged burner ports, or issues with the gas supply. To resolve the problem, you'll need to identify the specific cause and take appropriate action, such as repairing the ignition system or cleaning the burner ports.
On sealed burner gas ranges, it is normal for all four burners to spark when one is turned on. Although each burner has its own igniter, all four burners operate off one spark control module, and will all spark even though only one burner is selected for gas to flow through it.
If the burners will not light up, it is because natural gas has not been delivered to the burner for some reason or because safety measures will not allow the burner to become lit. If the ignition process fails, it may be due to the thermocouple or flame sensor.
If the ignition coil does not have spark, it's time to check its wires. Use a test light to check the continuity on the signal wire and power wire on the ignition coil. If both wires are functional but the coil fails to produce spark, the ignition coil or the ignition control module is bad.
The problem with your ignition could be as simple as the burner, valves and ignition being clogged with food and grease that may have built up over time. Before inspecting, make sure that the gas supply is switched off, then inspect the areas which could be impacting your ignition.
Test your spark plugs wires.
If you have a good spark on all wires look for timing problems or other issues. If you do not have a good spark in all wires then you may have an electrical problem in your ignition system.
Igniter Cost: The igniter costs no more than $30 to $50. Check with your furnace manufacture for the model number of your furnace so you can find the right igniter for your unit. Furnaces can last for several years, and hence it is not hard to find the right replacement part.
The most common reason a gas stove won't light is that the igniter is clogged with debris. Over time, dirt and dust can accumulate on the igniter and prevent it from sparking. If this is the case, you'll need to clean it off in order for the stove to work properly.
First, find the reset button on your car's ignition. This is usually located near the steering column. Once you've located the reset button, press and hold it for a few seconds. Next, insert your new key into the ignition and turn it to the “on” position.
For hot surface ignitors, gently clean the ignitor with a soft brush or cloth to remove any dirt and debris buildup. Be careful not to apply too much pressure, as these ignitors are fragile. For spark ignitors, carefully clean the ignitor electrode and the surrounding area to ensure proper spark ignition.
Remove the grate and burner cap from the problematic burner. Remove the sealed burner base and look for loose connections or disconnected wires. Secure any loose connections and reconnect any disconnected wires, reinstall the burner base, cap and grate. Restore power to the stove and test the connection.
You can replace a bad burner block by disconnecting the terminal wires with a screwdriver and screwing in an oven burner replacement. See your unit's manufacturer's instructions for diagrams and additional instructions.