Orifice sizing depends on the altitude and the specific BTU requirements of the appliance

it monitors the burner area for escaping flames or "rollout" caused by heat exchanger failure

and black terminals to match standard wiring harnesses

This spring is designed exclusively for the Maxitrol RV81 and RV210D series gas pressure regulators

Heil Quaker ICP 1320364 Limit Switch Orifice sizing depends on theThe Heil Quaker ICP 1320364 Limit Switch is a critical OEM furnace safety control engineered specifically for International Comfort Products (ICP) equipment. As an auto reset temperature switch, this component monitors high side plenum temperatures to prevent thermal runaway and heat exchanger damage. It is calibrated to open the electrical circuit when temperatures reach the 110F to 130F threshold, providing essential protection for residential and