ensure you have a 35 MFD / 370V run capacitor on hand

This dual-purpose unit features a high-limit range of 5 to 28 inches W

It is typically used as an ambient air thermostat to prevent auxiliary electric heat from operating until the outdoor temperature drops below the balance point

Common Questions & Technical Support Is the Nordyne 917173C compatible with gas furnaces

Lennox 97J49 Limit Switch 320735-701 ensure you have a 35The Lennox 97J49 Limit Switch is a mission critical safety component engineered for precise thermal regulation in residential and light commercial HVAC systems. This OEM Lennox replacement part functions as a high limit safeguard, specifically calibrated for a 120 150F temperature range to protect the heat exchanger from catastrophic thermal stress. As a veteran grade furnace limit switch, the 97J49 features an automatic reset (AUTO) mechanism,