Kenmore Oven makes a flush sound - How Can I fix?

You obviously mustn’t ignore any weird sound your Kenmore oven makes. This sound may indicate that the oven has a loose part or warped fan blade, which will both require repair. Unfortunately, replacing the bearings or fan only is not usually an option, but you can replace the motor to restore the convection oven back to a functional, less noisy state. You can hear clicking when the igniter lights your gas-powered oven. However, loud clicks, bangs, or pops may mean you have an underlying issue with the oven's components or gas lines. Contractors may need to inspect and clean igniters to reduce the noise and ensure the gas lights the oven effectively. Be sure to power down the oven and shut off the gas supply before addressing any issues with the igniters or gas lines. When gas lines, tanks, or appliances give you a pinging or knocking sound, it’s likely due to problems with the air/gas mixture.  When this mixture is uneven flow in the gas lines will not move evenly (similar to the water hammer noise you can get when there’s air in the plumbing).  One way to check this is by looking at your furnace or a gas stove.  If the flames are mostly yellow or white-blue instead of being blue with a yellow tip, then there’s an air-mix problem and you should call a professional to repair the line. Even if you purchased the top-of-the-line model and have maintained it well over the years, your oven won't last forever. On average, you can expect an oven to last between 13 and 15 years. Repairs are possible in many instances, especially if your oven is younger. On the other hand, if your oven is at or approaching its expected lifespan, a new oven may be a better investment. Fortunately, you have a great chance to use your appliance longer if you maintain it properly and clean the unit regularly.