Lochinvar & A.O. Smith 100208380 Pressure Switch
The Lochinvar & A.O. Smith 100208380 Pressure Switch is a critical safety component engineered for precise combustion air proving in high-efficiency boilers and water heaters. This OEM replacement part is factory-calibrated to a 1.05-inch water column (WC) set point, ensuring the integrated draft inducer or blower provides sufficient static pressure before the ignition sequence is initiated. Designed for compatibility with various Lochinvar Knight and A.O. Smith power-vented systems, it replaces obsolete part numbers such as PRS20009. This differential air pressure switch features a durable diaphragm and high-quality electrical contacts to prevent nuisance lockouts and "pressure switch failed open" error codes (typically a 3-flash signal on many residential units). As an essential HVAC safety switch, it monitors for restricted venting or failed blower motors, protecting the heat exchanger from hazardous operating conditions. For technicians, this 1.05" WC pressure switch offers a direct-fit solution that restores system reliability without the need for field modifications.
Key Benefits- Precise 1.05" WC Calibration: Factory-set to ensure accurate vent pressure monitoring and safe ignition cycles.
- Direct OEM Compatibility: Engineered as a drop-in replacement for Lochinvar and A.O. Smith models, including PBL1501-B9 and PBL2001 boilers.
- Enhanced Safety Logic: Prevents gas valve operation if the inducer fan fails or if there is a blocked exhaust obstruction.
- Rugged Construction: Built to withstand the temperature fluctuations and high-cycle demands of commercial heating systems.
- Simplifies Troubleshooting: Resolves common "3-flash" error codes related to pressure circuit failures.
How do I troubleshoot a 100208380 switch showing a "Failed Open" code?
Verify the continuity of the switch contacts using a multimeter while the draft inducer is running. Also, inspect the silicone tubing for cracks, moisture, or blockages at the barbed fittings on the blower housing.
Can I use this to replace a switch with a different water column rating?
No. Pressure switches must match the manufacturer's specified WC set point (1.05" for this model) to ensure the combustion process remains within safe parameters. Installing an incorrect rating can lead to incomplete combustion or delayed ignition.
What causes these switches to fail prematurely?
The most frequent causes are condensate buildup in the sensing tubes, debris in the blower wheel, or excessive vent pipe length creating backpressure that exceeds the switch's operating range.
This item is not eligible for free shipping.
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: $50.96
-65%$50.96
$17.84Lochinvar & A.O. Smith 100208380 Pressure Switch
The Lochinvar & A.O. Smith 100208380 Pressure Switch is a critical safety component engineered for precise combustion air proving in high-efficiency boilers and water heaters. This OEM replacement part is factory-calibrated to a 1.05-inch water column (WC) set point, ensuring the integrated draft inducer or blower provides sufficient static pressure before the ignition sequence is initiated. Designed for compatibility with various Lochinvar Knight and A.O. Smith power-vented systems, it replaces obsolete part numbers such as PRS20009. This differential air pressure switch features a durable diaphragm and high-quality electrical contacts to prevent nuisance lockouts and "pressure switch failed open" error codes (typically a 3-flash signal on many residential units). As an essential HVAC safety switch, it monitors for restricted venting or failed blower motors, protecting the heat exchanger from hazardous operating conditions. For technicians, this 1.05" WC pressure switch offers a direct-fit solution that restores system reliability without the need for field modifications.
Key Benefits- Precise 1.05" WC Calibration: Factory-set to ensure accurate vent pressure monitoring and safe ignition cycles.
- Direct OEM Compatibility: Engineered as a drop-in replacement for Lochinvar and A.O. Smith models, including PBL1501-B9 and PBL2001 boilers.
- Enhanced Safety Logic: Prevents gas valve operation if the inducer fan fails or if there is a blocked exhaust obstruction.
- Rugged Construction: Built to withstand the temperature fluctuations and high-cycle demands of commercial heating systems.
- Simplifies Troubleshooting: Resolves common "3-flash" error codes related to pressure circuit failures.
How do I troubleshoot a 100208380 switch showing a "Failed Open" code?
Verify the continuity of the switch contacts using a multimeter while the draft inducer is running. Also, inspect the silicone tubing for cracks, moisture, or blockages at the barbed fittings on the blower housing.
Can I use this to replace a switch with a different water column rating?
No. Pressure switches must match the manufacturer's specified WC set point (1.05" for this model) to ensure the combustion process remains within safe parameters. Installing an incorrect rating can lead to incomplete combustion or delayed ignition.
What causes these switches to fail prematurely?
The most frequent causes are condensate buildup in the sensing tubes, debris in the blower wheel, or excessive vent pipe length creating backpressure that exceeds the switch's operating range.
This item is not eligible for free shipping.
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.
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Description
The Lochinvar & A.O. Smith 100208380 Pressure Switch is a critical safety component engineered for precise combustion air proving in high-efficiency boilers and water heaters. This OEM replacement part is factory-calibrated to a 1.05-inch water column (WC) set point, ensuring the integrated draft inducer or blower provides sufficient static pressure before the ignition sequence is initiated. Designed for compatibility with various Lochinvar Knight and A.O. Smith power-vented systems, it replaces obsolete part numbers such as PRS20009. This differential air pressure switch features a durable diaphragm and high-quality electrical contacts to prevent nuisance lockouts and "pressure switch failed open" error codes (typically a 3-flash signal on many residential units). As an essential HVAC safety switch, it monitors for restricted venting or failed blower motors, protecting the heat exchanger from hazardous operating conditions. For technicians, this 1.05" WC pressure switch offers a direct-fit solution that restores system reliability without the need for field modifications.
Key Benefits- Precise 1.05" WC Calibration: Factory-set to ensure accurate vent pressure monitoring and safe ignition cycles.
- Direct OEM Compatibility: Engineered as a drop-in replacement for Lochinvar and A.O. Smith models, including PBL1501-B9 and PBL2001 boilers.
- Enhanced Safety Logic: Prevents gas valve operation if the inducer fan fails or if there is a blocked exhaust obstruction.
- Rugged Construction: Built to withstand the temperature fluctuations and high-cycle demands of commercial heating systems.
- Simplifies Troubleshooting: Resolves common "3-flash" error codes related to pressure circuit failures.
How do I troubleshoot a 100208380 switch showing a "Failed Open" code?
Verify the continuity of the switch contacts using a multimeter while the draft inducer is running. Also, inspect the silicone tubing for cracks, moisture, or blockages at the barbed fittings on the blower housing.
Can I use this to replace a switch with a different water column rating?
No. Pressure switches must match the manufacturer's specified WC set point (1.05" for this model) to ensure the combustion process remains within safe parameters. Installing an incorrect rating can lead to incomplete combustion or delayed ignition.
What causes these switches to fail prematurely?
The most frequent causes are condensate buildup in the sensing tubes, debris in the blower wheel, or excessive vent pipe length creating backpressure that exceeds the switch's operating range.
This item is not eligible for free shipping.
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.
