The Nordyne 904820 is constructed from high-grade materials to withstand thermal cycling

This 400F thermal switch is a direct replacement for various Lennox HVAC safety switches where high-limit thermal protection is required to prevent equipment damage and ensure a safe combustion environment

The NBR (Buna-N) seals in this kit are rated for a maximum temperature of 180°F

The 14D89 is rated for 208/230V

verifying the run capacitor (typically 5 MFD at 370 VAC) is essential to prevent premature winding failure

Reznor 195077 Outlet Collar 30067439-890 The Nordyne 904820 is constructedThe Reznor 195077 is a precision engineered 4" outlet collar designed for seamless integration with Reznor unit heaters. As a genuine OEM Reznor replacement part, this 4 inch diameter collar serves as the critical transition point between the heaters air outlet and the facility's ductwork. It is specifically manufactured to facilitate a secure, airtight seal, which is essential for maintaining proper HVAC airflow and maximizing system energy