I used to live in a house built in 1990 that had a Whirlpool oven that used a piezo ignition. It would click for about a minute, wait another minute to prove the flame, then the burner came on. Worked well for about 20 years and eventually it's mechanical clock went haywire and the flame sensor for the oven kept getting fouled. I'd prefer an intermittent pilot like this to be on my oven though to save the power. ..at least the glow bar isn't wasted heat, it's in the oven after all. It's a bigger factor if electricity is much more expensive than gas or electricity is scarce(off-grid).
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