although technicians should always verify dip switch settings or jumper configurations against the original board's setup

this model features an adjustable switch point

meaning it closes the circuit to trigger the fan at 190°F and opens the circuit to cut power at 30°F

corroded blades

improper expansion valve hunting

Markel ET9STS Stat 323055-751 although technicians should always verifyThe Markel ET9STS is a heavy duty line voltage thermostat engineered specifically for high capacity heat only applications. Built with a single pole single throw (SPST) snap action switch, this industrial heating control is rated for 22 Amps at 120 277V resistive loads, making it a reliable choice for direct connection to baseboard heaters, fan forced unit heaters, and radiant heating elements. The bimetal actuator provides a consistent 2 degree