Description
The Rheem-Ruud 42-24166-81 is an OEM dual pressure switch engineered for use in Rheem and Ruud gas furnaces and air handlers. This switch monitors negative draft pressure at two distinct setpoints — (-)0.15 inches water column and (-)0.30 inches water column — to verify proper inducer motor operation before allowing ignition to proceed. By confirming adequate combustion airflow at both thresholds, the switch provides a critical layer of safety protection against flue gas spillage and heat exchanger overheat conditions.
Key Features
- Dual setpoint design: (-)0.15 w.c. and (-)0.30 w.c. negative pressure sensing
- OEM Rheem-Ruud replacement part — direct drop-in fit for compatible models
- Monitors inducer/draft blower operation to confirm adequate combustion airflow
- Prevents ignition sequence from initiating if proper draft pressure is not established
- Protects against flue gas spillage and unsafe furnace operating conditions
- Durable construction for long-term reliability in residential and light commercial applications
Product Specifications
- SKU: 42-24166-81
- Brand: Rheem-Ruud
- Type: Dual Pressure Switch
- Setpoint 1: (-)0.15 inches water column
- Setpoint 2: (-)0.30 inches water column
- Pressure Type: Negative (vacuum/draft sensing)
- Application: Gas furnace inducer/draft pressure proving
Application
This dual pressure switch is a direct OEM replacement designed to restore safe, code-compliant operation to Rheem and Ruud furnaces. It is typically located on the inducer housing or flue assembly and is wired into the furnace control board’s safety circuit. Always verify compatibility with your specific furnace model number before installation. Consult the equipment service manual for proper wiring and pressure tap connections.
Reviews
There are no reviews yet.