Lochinvar & A.O. Smith 100208405 Pressure Switch
The Lochinvar & A.O. Smith 100208405 Pressure Switch is a critical safety component designed for high-efficiency condensing boilers and commercial water heaters. This OEM replacement pressure switch monitors the pressure differential within the combustion chamber or venting system to ensure safe operation. When the blower motor proof is established, the switch closes its contacts to allow the ignition sequence to proceed. If a blocked flue or restricted air intake occurs, the 100208405 will trip, immediately halting the firing cycle to prevent the accumulation of flue gases or incomplete combustion. Built to exacting factory set points, this HVAC pressure sensor is engineered for extreme precision in low-pressure applications common in the Lochinvar Knight and A.O. Smith Cyclone series. For veteran contractors, this part is essential for resolving system lockout codes related to air proving faults, ensuring the appliance maintains its designed thermal efficiency and operational safety standards.
Key Benefits:
- Precise Differential Monitoring: Accurately detects pressure changes to ensure the combustion blower is moving air correctly before ignition.
- Direct OEM Compatibility: Engineered specifically for Lochinvar and A.O. Smith commercial units, ensuring a perfect fit and reliable electrical termination.
- System Protection: Acts as a primary fail-safe against blocked vent conditions and fan failure, protecting the heat exchanger and venting infrastructure.
- Durable Construction: Designed to withstand the high-cycle demands of commercial hydronic and potable water heating environments.
Common Questions:
What causes a pressure switch lockout on a condensing boiler?
Common culprits include a clogged condensate trap, obstructed venting, a failing inducer motor, or cracked silicone tubing. Always inspect the vent terminal for debris before replacing the switch.
Can I use a generic adjustable switch instead of the 100208405?
It is not recommended. This OEM switch has a specific factory-calibrated set point required to meet the safety certifications of the appliance. Using an incorrect part can lead to nuisance tripping or unsafe operating conditions.
How do I test if the pressure switch is functioning?
Using a digital manometer, verify the actual pressure produced by the blower matches the switch's rating. You can then use a multimeter to check for continuity across the terminals when the appropriate pressure is applied.
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: $112.23
-65%$112.23
$39.28Lochinvar & A.O. Smith 100208405 Pressure Switch
The Lochinvar & A.O. Smith 100208405 Pressure Switch is a critical safety component designed for high-efficiency condensing boilers and commercial water heaters. This OEM replacement pressure switch monitors the pressure differential within the combustion chamber or venting system to ensure safe operation. When the blower motor proof is established, the switch closes its contacts to allow the ignition sequence to proceed. If a blocked flue or restricted air intake occurs, the 100208405 will trip, immediately halting the firing cycle to prevent the accumulation of flue gases or incomplete combustion. Built to exacting factory set points, this HVAC pressure sensor is engineered for extreme precision in low-pressure applications common in the Lochinvar Knight and A.O. Smith Cyclone series. For veteran contractors, this part is essential for resolving system lockout codes related to air proving faults, ensuring the appliance maintains its designed thermal efficiency and operational safety standards.
Key Benefits:
- Precise Differential Monitoring: Accurately detects pressure changes to ensure the combustion blower is moving air correctly before ignition.
- Direct OEM Compatibility: Engineered specifically for Lochinvar and A.O. Smith commercial units, ensuring a perfect fit and reliable electrical termination.
- System Protection: Acts as a primary fail-safe against blocked vent conditions and fan failure, protecting the heat exchanger and venting infrastructure.
- Durable Construction: Designed to withstand the high-cycle demands of commercial hydronic and potable water heating environments.
Common Questions:
What causes a pressure switch lockout on a condensing boiler?
Common culprits include a clogged condensate trap, obstructed venting, a failing inducer motor, or cracked silicone tubing. Always inspect the vent terminal for debris before replacing the switch.
Can I use a generic adjustable switch instead of the 100208405?
It is not recommended. This OEM switch has a specific factory-calibrated set point required to meet the safety certifications of the appliance. Using an incorrect part can lead to nuisance tripping or unsafe operating conditions.
How do I test if the pressure switch is functioning?
Using a digital manometer, verify the actual pressure produced by the blower matches the switch's rating. You can then use a multimeter to check for continuity across the terminals when the appropriate pressure is applied.
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.
Product Information
Product Information
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Shipping & Returns
Description
The Lochinvar & A.O. Smith 100208405 Pressure Switch is a critical safety component designed for high-efficiency condensing boilers and commercial water heaters. This OEM replacement pressure switch monitors the pressure differential within the combustion chamber or venting system to ensure safe operation. When the blower motor proof is established, the switch closes its contacts to allow the ignition sequence to proceed. If a blocked flue or restricted air intake occurs, the 100208405 will trip, immediately halting the firing cycle to prevent the accumulation of flue gases or incomplete combustion. Built to exacting factory set points, this HVAC pressure sensor is engineered for extreme precision in low-pressure applications common in the Lochinvar Knight and A.O. Smith Cyclone series. For veteran contractors, this part is essential for resolving system lockout codes related to air proving faults, ensuring the appliance maintains its designed thermal efficiency and operational safety standards.
Key Benefits:
- Precise Differential Monitoring: Accurately detects pressure changes to ensure the combustion blower is moving air correctly before ignition.
- Direct OEM Compatibility: Engineered specifically for Lochinvar and A.O. Smith commercial units, ensuring a perfect fit and reliable electrical termination.
- System Protection: Acts as a primary fail-safe against blocked vent conditions and fan failure, protecting the heat exchanger and venting infrastructure.
- Durable Construction: Designed to withstand the high-cycle demands of commercial hydronic and potable water heating environments.
Common Questions:
What causes a pressure switch lockout on a condensing boiler?
Common culprits include a clogged condensate trap, obstructed venting, a failing inducer motor, or cracked silicone tubing. Always inspect the vent terminal for debris before replacing the switch.
Can I use a generic adjustable switch instead of the 100208405?
It is not recommended. This OEM switch has a specific factory-calibrated set point required to meet the safety certifications of the appliance. Using an incorrect part can lead to nuisance tripping or unsafe operating conditions.
How do I test if the pressure switch is functioning?
Using a digital manometer, verify the actual pressure produced by the blower matches the switch's rating. You can then use a multimeter to check for continuity across the terminals when the appropriate pressure is applied.
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.
