Always verify the model and serial number before installation as wiring harnesses may vary between production series

How do I know if the inducer motor or the pressure switch is failing

Industrial Durability: Rugged I-beam design manufactured from premium aluminum alloy for long-term field use

Robust Construction: Features a heavy-duty cast iron water valve body designed to withstand high-pressure water-cooled environments

automatically breaking the electrical circuit if the internal plenum temperature exceeds the 145°F safety threshold

Resideo L4006H1004 Aquastat Controller Refrigerant Always verify the model andThe Resideo L4006H1004 Aquastat Controller is a high limit immersion device engineered for precision temperature regulation in hydronic systems. Designed for professionals requiring a reliable manual reset boiler control, this unit features a 3 8" x 2 7 8" copper bulb sensing element and single pole single throw (SPST) contacts that break on temperature rise. This high limit aquastat provides critical safety for pressurized vessels and boilers,