Resideo L4006E1042 Aquastat Controller 321894-708 this SP12189 assembly provides the

this SP12189 assembly provides the exact static pressure requirements specified by the manufacturer for optimal combustion efficiency and system reliability

Avoid touching the element with bare hands

Precision Calibration: Factory-set O80 C30 thermal limits ensure the defrost cycle initiates and terminates at the exact temperature required for the specific cabinet design

What causes a "Flame Signal Low" reading on this module

Resideo L4006E1042 Aquastat Controller 321894-708 this SP12189 assembly provides theThe Resideo L4006E1042 Aquastat Controller is a professional grade high limit aquastat engineered for precision temperature regulation in hydronic systems, including boilers and storage tanks. This immersion type device features a manual reset mechanism, ensuring system safety by requiring a physical intervention if temperatures exceed the designated setpoint. Designed with a 130F to 270F operating range, it utilizes SPST contacts that break on