International Comfort Products 1191554 Vent Pressure Switch

Description

The International Comfort Products 1191554 is a factory-specified vent pressure switch engineered as a direct OEM replacement for compatible ICP heating and cooling systems. This safety-critical component monitors the pressure differential generated by the draft inducer blower to confirm proper venting before allowing the ignition sequence to proceed, helping protect equipment and occupants from hazardous flue gas conditions.

How It Works

The vent pressure switch is a normally open (or normally closed, depending on application) diaphragm-actuated switch that senses negative pressure within the flue/vent system. When the inducer motor reaches the correct operating speed and establishes adequate draft, the switch closes (or opens), signaling the furnace control board to advance through the ignition sequence. If proper draft pressure is not achieved — due to a blocked flue, failed inducer, or restricted vent — the switch prevents ignition, locking out the system and triggering a diagnostic fault code.

Key Features

• OEM direct replacement for International Comfort Products (ICP) systems
• Monitors draft inducer pressure to verify safe venting conditions
• Prevents ignition sequence if adequate vent pressure is not established
• Diaphragm-actuated design for reliable, repeatable switching action
• Designed for precise pressure setpoint matching to original equipment specifications
• Helps protect against flue gas spillage and carbon monoxide risks
• Supports system diagnostic fault code generation on failure

Application

• Compatible with select International Comfort Products (ICP) gas furnaces and air handlers
• Intended as a like-for-like OEM replacement part — always verify compatibility with your unit’s model and serial number before installation

Installation Notes

Installation should be performed by a qualified HVAC technician. Verify the hose port connections, pressure tubing routing, and electrical harness connections match the original switch configuration. After replacement, confirm proper furnace operation through a complete ignition cycle test and check for any active fault codes on the control board.