Thermostats (Mechanical)

Mechanical thermostats regulate hot tub water temperature through a physical bimetallic or capillary-tube sensing mechanism, operating independently of electronic control boards. These thermostats are commonly found in older spa designs and certain budget spa models that use analog temperature control. A failing mechanical thermostat causes erratic heating behavior or continuous heater operation. Spa Guy Parts carries replacement mechanical thermostats for legacy and basic hot tub heating systems. Free shipping over $75.