Most replacements are necessitated by heavy oxidation

The Armstrong Series 811 is typically rated for temperatures up to 450°F (232°C) in standard configurations

providing a durable solution for high-traffic air handling units and zone control systems

2 Cv rating and a 500:1 rangeability

Robust Electromagnetic Force: Delivers high-torque response to ensure positive opening and closing of the solenoid valve under pressure

Lennox 75M31 Limit Control 30067439-890 Most replacements are necessitated byThe Lennox 75M31 Limit Control is a critical OEM replacement part designed to maintain safe thermal operating parameters within residential and commercial HVAC systems. As a primary high limit switch, this component utilizes a precise L170 40F calibration, meaning the normally closed contacts are engineered to open when the heat exchanger surface temperature reaches 170F. Once the circuit is interrupted, the burner ignition or heating source is