Reznor 196388 Pressure Switch

The Reznor 196388 Pressure Switch is a critical safety component calibrated to a 0.50" WC setpoint, identifiable by its orange color-coded housing. Designed for precision draft monitoring, this OEM Reznor replacement part ensures the inducer motor establishes proper static pressure before allowing the ignition sequence to proceed. It is specifically engineered for high-altitude applications and is compatible with a wide range of Reznor unit heaters, including the UDAP, UDAS, UDBP, and UDBS series, as well as UBX, UBZ, and UDX models. When a furnace short cycles or fails to trigger the igniter, testing the differential pressure across this switch is a standard diagnostic step for any technician. This factory-spec sensing switch maintains HVAC system safety by preventing operation during vent blockages or inducer assembly failures. Standardizing on genuine Reznor components ensures mounting bracket alignment and electrical terminal compatibility for fast, reliable field swaps.

• Precise 0.5" WC Calibration: Ensures accurate combustion air verification to prevent nuisance tripping and lockout codes.
• High-Altitude Compatibility: Pre-configured for thinner air densities, making it the correct service part for specific UDAP60, UDAP75, and UDAP100 installations.
• Nortek OEM Quality: Guarantees structural integrity of the diaphragm and continuity of electrical contacts compared to generic aftermarket alternatives.
• Color-Coded Identification: The orange label allows for immediate field verification of the water column rating, reducing installation errors.

What does the orange label signify on this switch?
In the Reznor parts ecosystem, the orange housing or label indicates a 0.50" WC trip point. Always match the color code and the part number 196388 to ensure the safety circuit operates within the burner's original design parameters.

Why is my Reznor unit heater throwing a pressure switch error?
Common culprits include a cracked inducer hose, a blocked flue vent, or moisture accumulation in the pressure switch tubing. If the manometer confirms the inducer is pulling sufficient vacuum but the switch fails to close, the internal diaphragm may be compromised.

Can I use this 196388 switch on a standard altitude unit?
While this is labeled as a high-altitude pressure switch, compatibility is determined by the specific model number and BTU rating of the heater. Always reference the unit's wiring diagram or technical data sheet to confirm the required WC rating before replacement.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.