When a Wolf gas or dual-fuel oven takes an unusually long time to preheat, exceeding standard 15 to 20 minute windows, the delay is typically caused by a degrading silicon-carbide igniter failing to draw sufficient electrical current to fully open the safety gas valve. Other contributing factors include calibration drift in the internal temperature sensor probe, degraded door gasket seals leaking heat, or running frequent self-clean cycles that stress internal thermal insulation.
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