Ruud 42-106209-01 Furnace Pressure Switch Assembly 2-stage

Product Description

The RUUD 42-106209-01 is a two-stage gas furnace pressure switch assembly designed to monitor and verify inducer draft pressure during furnace operation. This assembly serves as a safety control: it confirms that the draft inducer has established proper negative pressure before allowing the gas valve to open, preventing unsafe ignition conditions. Rated for set points of -0.20 and -0.30 inches water column, this assembly matches the dual-stage pressure requirements of select RUUD residential gas furnace models. Installation is performed by licensed HVAC technicians during routine service or as part of a component-level repair on a failed pressure circuit.

This pressure switch assembly is used on two-stage residential gas furnaces in the RUUD R802PA product line. It is appropriate for upflow and multi-position furnace configurations listed below. Typical install scenarios include replacement of a failed or out-of-tolerance pressure switch causing lockout fault codes, nuisance trips, or no-heat calls. The assembly is a direct OEM-style replacement for the models listed in the compatibility section.

Key Features

• Dual set-point design rated at -0.20 and -0.30 inches water column for two-stage furnace operation
• OEM replacement assembly for multiple RUUD R802PA series gas furnaces
• Compact form factor at 9.35 inches length, 3.1 inches width, and 2.7 inches height
• Lightweight at 0.4 pounds for easy handling during service
• Functions as a draft-proving safety control to prevent unsafe ignition sequences

Compatibility

Designed for use on the following RUUD gas furnace models: R802PA050314MSA/MXA, R802PA075317MSA/MX, R802PA075417MSA/MXAA, R802PA100417MSA/MXA, R802PA100521MSA/MXA, R802PA25524MSA/MXA, and R802PA150524MSA/MXA.

Installation Notes

Installation should be performed by a qualified HVAC technician. Disconnect power to the furnace and shut off the gas supply before beginning any work on the pressure switch circuit. Verify that the replacement switch set points match the original assembly and inspect the rubber pressure tubing for cracks or blockages before reconnecting. Follow all applicable local mechanical codes and manufacturer service instructions when replacing draft-pressure safety controls.

Technical Specifications

• Type: Pressure Switch Assembly
• Set Points: -0.20 / -0.30 inches water column
• Stages: 2-Stage
• Length: 9.35 inches
• Width: 3.1 inches
• Height: 2.7 inches
• Weight: 0.4 pounds

Standard Information

• Brand: RUUD
• Manufacturer Part Number: 42-106209-01