Description
The Armstrong Furnace R45694-007 is an OEM replacement pressure switch designed for use in Armstrong Furnace heating systems. This single-pole, single-throw (SPST) pressure switch monitors draft pressure within the furnace venting system to ensure safe and efficient operation. When the sensed pressure deviates from the calibrated setpoint, the switch opens or closes the circuit to protect the heat exchanger and combustion components from damage.
Key Features
- OEM Armstrong Furnace replacement part — ensures proper fit and function
- Calibrated setpoint: .35″ water column (w.c.)
- Switch type: SPST (Single-Pole, Single-Throw)
- Port connection: 1/4″ barb fitting for secure hose attachment
- Monitors inducer/draft pressure to protect furnace operation
- Helps prevent furnace operation under unsafe venting conditions
How It Works
The pressure switch is connected via a rubber hose to the inducer motor housing or collector box. As the inducer motor runs, it creates a negative pressure that the switch detects. If the pressure does not reach the required .35″ w.c. threshold — indicating a blocked flue, failed inducer, or cracked hose — the switch remains open and prevents the furnace from firing, protecting the system and occupants.
Application
- Direct OEM replacement for compatible Armstrong Furnace models
- Suitable for residential gas furnace applications
- Recommended for use by qualified HVAC technicians
Specifications
- Brand: Armstrong Furnace
- Part Number: R45694-007
- Setpoint: .35″ w.c.
- Switch Configuration: SPST
- Connection Type: 1/4″ barb
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