Description
The Copeland White-Rodgers 5D51-78 is a fan and limit control designed for use in warm air furnace systems. This control regulates blower fan operation and provides high-temperature limit protection by monitoring plenum temperature. Featuring an 11-inch insertion length, it is installed directly into the furnace plenum to accurately sense air temperature. The control automatically starts and stops the blower at preset temperatures while shutting down the burner in the event of overheating, ensuring safe and efficient furnace operation.
Key Features
- Combination fan and limit control for furnace applications
- 11" insertion length for plenum temperature sensing
- Controls blower operation based on temperature settings
- Provides high-limit safety shutdown to prevent overheating
- Suitable for residential warm air furnace systems
- Designed for reliable temperature-based control and protection






