The Heil Quaker ICP IS203655708 Pressure Switch is a mission-critical safety component engineered for International Comfort Products (ICP) systems. This OEM furnace pressure switch is factory-calibrated to a precise .65-inch water column (WC) set point, ensuring the draft inducer motor maintains the correct negative pressure before ignition. Featuring a Single Pole Single Throw (SPST) configuration and a standard 1/4-inch barb connection, this switch provides reliable circuit closure when the vacuum threshold is met. As the direct replacement for R45695-009, it fits seamlessly into a wide range of brands under the ICP umbrella, including Heil, Tempstar, Comfortmaker, and Keeprite. For technicians troubleshooting inducer circuits, this part addresses common failure points like ruptured diaphragms or sticking contacts, restoring proper sequence of operation. Field-tested for high-cycle durability, the ICP IS203655708 ensures your furnace venting system operates safely and prevents hazardous gas buildup or inefficient combustion cycles.

• Precise .65" WC Calibration: Specifically tuned for exact pressure monitoring in high-efficiency ICP heating equipment.
• Universal 1/4" Barb Port: Simplifies installation and ensures a secure, leak-free connection to existing vacuum hoses.
• Direct OEM Replacement: replaces discontinued model R45695-009, eliminating the need for field modifications.
• Broad Brand Compatibility: Certified for use across all International Comfort Products sub-brands like Airquest and Day & Night.

How do I know if the IS203655708 pressure switch is failing?
Failure is typically indicated by an inducer motor that runs continuously without the burners igniting, or a specific flash code on the furnace control board. Use a manometer to verify the draft pull exceeds .65" WC; if the vacuum is sufficient but the SPST switch fails to show continuity, the component requires replacement.

Is this switch compatible with my older Armstrong or Lennox unit?
While the IS203655708 is the primary replacement for the R45695-009, it is critical to match the WC rating exactly. If your system requires a different set point (e.g., .20" WC), using this part could prevent the furnace from firing correctly. Always verify technical specifications against your model's data plate.

Why is my pressure switch sticking open despite a good inducer motor?
Ensure the 1/4" barb connection and the vacuum hose are clear of debris, moisture, or blockages. In condensing furnaces, water can often collect in the tubing, preventing the diaphragm from sensing the correct pressure. If the lines are clear, the internal diaphragm may be ruptured.

Item is Non Cancelable / Non Returnable

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.