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WP3390291 Dryer High Limit Thermostat – The essential fix for a Whirlpool dryer that won't heat, overheats and shuts off, has intermittent heat, stops mid-cycle, or runs but produces no heat.
The high limit thermostat is a safety device mounted on the heater housing that monitors dryer temperature. If the temperature exceeds a safe limit (around 250°F), it cuts power to the heating element to prevent overheating and fire. When it fails — either stuck open (no heat) or stuck closed (overheating) — your dryer won't function properly.
A thermostat stuck in the open position causes a no-heat condition because it permanently interrupts power to the element. A thermostat that's cycling too frequently (due to a clogged vent) causes the dryer to heat intermittently or shut off mid-cycle. If your dryer runs but won't heat, or heats for a while then stops, the high limit thermostat is a common cause — especially if the vent system is restricted.
This genuine OEM Whirlpool part directly replaces 3390291, 696397, XPT198, and AP6008306. Works with Whirlpool, Maytag, KitchenAid, Kenmore, Amana, Roper, Crosley, Estate, and Admiral electric and gas dryers. All compatible model numbers are tagged for easy verification.
20–30 minute installation that restores safe, consistent heating. No special tools required beyond basic hand tools.
With over 30 years of experience in appliance parts, we provide authentic OEM components backed by expert support. Our team is available by phone to help ensure you get the right part for your repair.
OEM Whirlpool quality. Guaranteed fit. Expert support. Fast Canadian shipping.

Item #41 in in diagram.
Part number WP3390291 replaces 3390291, 696397, XPT198, AP6008306
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What's the difference between the high limit thermostat and the thermal fuse?
The high limit thermostat and thermal fuse are both safety devices that protect your dryer from overheating, but they work differently. The high limit thermostat (like the WP3390291) is a resettable bi-metal switch — when the temperature gets too high, it opens the circuit to cut power to the heater, but once the temperature drops, it automatically resets and allows heating to resume. It's designed to cycle as needed during normal operation if temperatures spike. The thermal fuse is a one-time safety device — when it blows due to excessive heat, it permanently breaks the circuit and must be replaced. It's the last line of defense and only activates if the high limit thermostat fails to control the temperature. If your dryer has no heat, test both components: the high limit thermostat should show continuity at room temperature (if it doesn't, it's failed open); the thermal fuse should also show continuity (if it doesn't, it's blown). Both components failing often indicates a clogged vent that caused severe overheating — always clean the vent system when replacing either part.
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Whirlpool
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