Reznor 201158 Pressure Switch

The Reznor 201158 Pressure Switch is a critical safety component designed for precise combustion air monitoring in high-capacity gas-fired unit heaters. Engineered for a setpoint of 1.10" WC, this SPST (Single Pole Single Throw) vacuum switch verifies that the inducer motor is moving sufficient air to ensure safe venting and combustion before the ignition sequence initiates. This specific model features dual 1/4" barb connections, allowing for standard pneumatic tubing integration and reliable differential pressure sensing across the heat exchanger or vent system.

A veteran technician knows that a failing pressure switch often mimics symptoms of a blocked flue or a weak inducer. The Reznor 201158 serves as an exact OEM replacement for large-scale units, including the UDAP200, UDAS200, UDBP200, and UDBS200 series, as well as their 225k to 400k BTU counterparts. Its heavy-duty construction is built to withstand the rapid thermal cycling and high-demand environments typical of commercial HVAC applications. When your meter shows that the inducer is pulling appropriate vacuum but the circuit remains open, swapping in this genuine Reznor part ensures the system returns to factory-spec operation without the reliability risks associated with universal alternatives.

• Precise 1.10" WC Setpoint: Calibrated specifically for high-output Reznor heaters to prevent nuisance trips and ensure safety.
• OEM Compatibility: Drop-in replacement for UDAP, UDAS, UDBP, and UDBS models between 200,000 and 400,000 BTU.
• Secure Interfacing: Features dual 1/4" barb connections for a leak-free seal with standard silicone or aluminum tubing.
• Proven Safety Logic: Reliable SPST contact closure confirms proper draft before allowing the gas valve to energize.
• Versatile Application: Suitable for standard and high-altitude installations (up to 6,000 ft) in compatible unit heaters.

Which Reznor models use the 201158 pressure switch?
This switch is typically found in larger unit heaters, specifically the 200, 225, 250, 300, 350, and 400 series within the UDAP, UDAS, UDBP, and UDBS product lines.

Can this switch be used in high-altitude environments?
Yes, the Reznor 201158 is rated for use in specific units operating at altitudes between 0 and 6,000 feet, provided it matches the manufacturer's specification for that elevation.

What does a dark blue label on the switch indicate?
In the Reznor parts ecosystem, the dark blue label is a visual identifier confirming the 1.10" WC pressure rating, helping technicians differentiate it from lower-rated switches during field service.

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.