Ceramic Low Limit Snap Switch for Whitfield Pellet Stoves. Also known as the Exhaust Heat Sensor. This is a 3/4", 140 degree fan switch. Works with the following models:

Whitfield: Advantage I (WP2), Advantage II (WP2), Advantage II-T (WP2), Advantage II-T Classic (WP2), Advantage III (WP2), Advantage Plus (WP7), Explorer (WF2), Legend (WP1), Prodigy I (WP3), Prodigy II (WP3), Quest (WP4), Quest Plus (WP4)

Compatible with Whitfield/Lennox Part # 12057601 and 12027601