Description
The Nordyne 632499R is an OEM replacement SPST (Single-Pole, Single-Throw) pressure switch engineered to deliver reliable draft-proving protection in Nordyne-brand heating systems. Designed to monitor negative pressure within the venting and inducer circuit, this switch helps safeguard the heat exchanger and combustion system by confirming proper airflow before allowing ignition to proceed.
Key Features
- Set point: -0.60″ w.c. (inches water column) — factory-calibrated for precise draft sensing
- SPST switching action for straightforward open/close circuit control
- 1/4″ barb port connection for secure, leak-free hose attachment
- Direct OEM replacement for compatible Nordyne furnace models
- Helps prevent unsafe furnace operation when adequate draft is not established
How It Works
The pressure switch monitors the negative pressure (vacuum) generated by the draft inducer motor. When the inducer creates the correct level of negative pressure — at or beyond the -0.60″ w.c. threshold — the switch closes, signaling the control board that safe venting conditions exist and allowing the ignition sequence to continue. If adequate draft is not sensed, the switch remains open and locks out ignition, protecting the system and occupants.
Application
- Designed for use in Nordyne gas furnaces requiring an SPST pressure switch
- Consult your equipment’s service manual or parts list to confirm compatibility before installation
- Intended for installation by qualified HVAC technicians
Specifications
- SKU: 632499R
- Brand: Nordyne
- Switch Type: SPST (Single-Pole, Single-Throw)
- Set Point: -0.60″ w.c.
- Port Connection: 1/4″ barb
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