10U66 | Lennox 103735-04, High Pressure Switch, Actuates at 640 PSI; Manual Reset | Lennox

670# M/R Hi Pressure SwitchThe Lennox 10U66 M/R Hi Pressure Switch is a replacement part for Lennox HVAC systems. It is a critical component that monitors and regulates the pressure in the system, ensuring optimal performance and safety. This switch is designed to withstand extreme temperatures and pressure fluctuations, making it a reliable choice for both residential and commercial applications. Made from high-quality materials, the 10U66 M/R Hi Pressure Switch is built to last. Its accurate and responsive design ensures that your system operates efficiently, preventing costly breakdowns and maintaining a comfortable indoor environment. Shop now at our HVAC supply store for the best prices and fast shipping on your Lennox HVAC parts!