York S1-024-35903-000 Pressure Switch
The York S1-024-35903-000 is a high-precision dual-stage pressure switch engineered for modern high-efficiency gas furnaces. This component is critical for monitoring the static pressure generated by the draft inducer blower, ensuring the combustion process only initiates under safe venting conditions. With factory-calibrated set points of .45" WC and .85" WC, this switch provides granular feedback to the integrated furnace control board regarding proper airflow through the heat exchanger. Utilizing a York S1-024-35903-000 pressure switch ensures the furnace safety circuit remains compliant with narrow operational tolerances, preventing the ignition of the main burners if the venting system is obstructed or the inducer performance degrades. This OEM replacement is essential for multi-stage heating systems where differential pressure verification is required for both low-fire and high-fire sequences, maintaining reliable HVAC system performance across varying demand cycles.
Key Benefits for Technicians
- Precise Set-Point Accuracy: Calibrated at .45" and .85" water column to match specific York, Luxaire, and Coleman furnace requirements.
- OEM Compatibility: Ensures direct fitment for furnace pressure switch replacements without the need for mounting bracket modifications or electrical adapters.
- Enhanced Safety Logic: Dual-port design allows for simultaneous monitoring of different atmospheric conditions within the combustion housing.
Common Technical Questions
How can I verify if the York S1-024-35903-000 is faulty? Use a digital manometer to measure the actual vacuum pressure from the inducer; if the WC readings meet the .45" or .85" thresholds but the switch contacts fail to close, the internal diaphragm or electrical contacts have likely failed.
What are the symptoms of a failing .45/.85 WC switch? The furnace will typically cycle through a 31 or 32 flash code on the control board, indicating the switch is either stuck open during the pre-purge or failing to close after the inducer reaches full RPM.
Are these switches interchangeable with universal models? In multi-stage furnaces, using a York dual-stage pressure switch is mandatory. Substituting with a single-stage universal switch will cause the control board to lockout, as it expects specific pressure signatures for different heating stages.
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.
Original: $105.74
-65%$105.74
$37.01York S1-024-35903-000 Pressure Switch
The York S1-024-35903-000 is a high-precision dual-stage pressure switch engineered for modern high-efficiency gas furnaces. This component is critical for monitoring the static pressure generated by the draft inducer blower, ensuring the combustion process only initiates under safe venting conditions. With factory-calibrated set points of .45" WC and .85" WC, this switch provides granular feedback to the integrated furnace control board regarding proper airflow through the heat exchanger. Utilizing a York S1-024-35903-000 pressure switch ensures the furnace safety circuit remains compliant with narrow operational tolerances, preventing the ignition of the main burners if the venting system is obstructed or the inducer performance degrades. This OEM replacement is essential for multi-stage heating systems where differential pressure verification is required for both low-fire and high-fire sequences, maintaining reliable HVAC system performance across varying demand cycles.
Key Benefits for Technicians
- Precise Set-Point Accuracy: Calibrated at .45" and .85" water column to match specific York, Luxaire, and Coleman furnace requirements.
- OEM Compatibility: Ensures direct fitment for furnace pressure switch replacements without the need for mounting bracket modifications or electrical adapters.
- Enhanced Safety Logic: Dual-port design allows for simultaneous monitoring of different atmospheric conditions within the combustion housing.
Common Technical Questions
How can I verify if the York S1-024-35903-000 is faulty? Use a digital manometer to measure the actual vacuum pressure from the inducer; if the WC readings meet the .45" or .85" thresholds but the switch contacts fail to close, the internal diaphragm or electrical contacts have likely failed.
What are the symptoms of a failing .45/.85 WC switch? The furnace will typically cycle through a 31 or 32 flash code on the control board, indicating the switch is either stuck open during the pre-purge or failing to close after the inducer reaches full RPM.
Are these switches interchangeable with universal models? In multi-stage furnaces, using a York dual-stage pressure switch is mandatory. Substituting with a single-stage universal switch will cause the control board to lockout, as it expects specific pressure signatures for different heating stages.
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.
Product Information
Product Information
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Description
The York S1-024-35903-000 is a high-precision dual-stage pressure switch engineered for modern high-efficiency gas furnaces. This component is critical for monitoring the static pressure generated by the draft inducer blower, ensuring the combustion process only initiates under safe venting conditions. With factory-calibrated set points of .45" WC and .85" WC, this switch provides granular feedback to the integrated furnace control board regarding proper airflow through the heat exchanger. Utilizing a York S1-024-35903-000 pressure switch ensures the furnace safety circuit remains compliant with narrow operational tolerances, preventing the ignition of the main burners if the venting system is obstructed or the inducer performance degrades. This OEM replacement is essential for multi-stage heating systems where differential pressure verification is required for both low-fire and high-fire sequences, maintaining reliable HVAC system performance across varying demand cycles.
Key Benefits for Technicians
- Precise Set-Point Accuracy: Calibrated at .45" and .85" water column to match specific York, Luxaire, and Coleman furnace requirements.
- OEM Compatibility: Ensures direct fitment for furnace pressure switch replacements without the need for mounting bracket modifications or electrical adapters.
- Enhanced Safety Logic: Dual-port design allows for simultaneous monitoring of different atmospheric conditions within the combustion housing.
Common Technical Questions
How can I verify if the York S1-024-35903-000 is faulty? Use a digital manometer to measure the actual vacuum pressure from the inducer; if the WC readings meet the .45" or .85" thresholds but the switch contacts fail to close, the internal diaphragm or electrical contacts have likely failed.
What are the symptoms of a failing .45/.85 WC switch? The furnace will typically cycle through a 31 or 32 flash code on the control board, indicating the switch is either stuck open during the pre-purge or failing to close after the inducer reaches full RPM.
Are these switches interchangeable with universal models? In multi-stage furnaces, using a York dual-stage pressure switch is mandatory. Substituting with a single-stage universal switch will cause the control board to lockout, as it expects specific pressure signatures for different heating stages.
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.
