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The INTERNATIONAL COMFORT PRODUCTS 1191553 is a genuine OEM vent pressure switch assembly designed to monitor and respond to pressure changes within a gas furnace venting system. When system pressure falls outside the rated operating range of -0.41 to -0.78 inches water column, the switch opens or closes to control equipment operation. This part is a direct OEM replacement, ensuring accurate calibration and reliable fit without adjustment. It is typically installed by licensed HVAC technicians during routine maintenance or when diagnosing ignition or inducer-related fault codes. The assembly measures 4 inches in length, 3.2 inches wide, and 3.2 inches tall, and weighs 0.2 pounds.
This pressure switch assembly is intended for use in residential gas furnace applications where draft inducer proving is required before ignition can proceed. It serves as a safety interlock, confirming that the venting system is operating within acceptable pressure limits before allowing the gas valve to open. It is suited for replacement in systems where the original switch has failed open, failed closed, or is reading outside calibrated range. Installers should verify the pressure rating matches the original switch before installation.
Designed as an OEM-style replacement vent pressure switch assembly for residential gas furnace systems requiring a -0.41 to -0.78 inches water column rated switch.
Installation should be performed by a licensed HVAC technician. Disconnect power to the furnace at the disconnect switch or breaker before removing the existing pressure switch. Confirm the replacement switch pressure rating matches the original unit before making connections. Refer to the furnace manufacturer wiring diagram and applicable local mechanical codes when reinstalling hose connections and wiring leads.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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