While you can upgrade from 370V to 440V

adjustment window for low-pressure applications

determined by looking at the discharge side

including those sold under the Coleman and Luxaire labels that require a #41 orifice for LP gas

it ensures proper atmospheric isolation

Nordyne 626470R Limit Switch While you can upgrade fromThe Nordyne 626470R Limit Switch is a critical safety component designed for precise thermal regulation within Nordyne, Intertherm, and Miller gas furnaces. This 115 155F AUTO limit switch functions as a high limit safety control, monitoring the heat exchanger temperature to prevent overheating and potential equipment failure. As an L155 40F furnace limit switch, it is engineered to open the circuit at a fixed 155F set point and automatically reset