Lochinvar & A.O. Smith 100208243 Switch
The Lochinvar & A.O. Smith 100208243 Blocked Drain Switch is a critical safety component designed for high-efficiency condensing boilers and water heaters. As a veteran technician, you know that managing condensate is non-negotiable; this OEM replacement part (formerly SWT2011) proactively monitors for atmospheric pressure changes or liquid backup within the drain system. When a blockage is detected in the condensate trap or drainage line, the switch interrupts the 24V control circuit, triggering a "Blocked Drain SW Open" fault on the Smart Touch interface. This prevents corrosive condensate from backing up into the heat exchanger or burner assembly, which can cause unrecoverable damage to the combustion chamber.
This genuine Lochinvar 100208243 is engineered with a specialized .5A 100V SMD configuration to ensure precise sensitivity and reliability in harsh, high-humidity environments. It is a direct fit for a wide range of Lochinvar and A.O. Smith models, including the AWH0500NPM, AWN151PM, and AWN200PM series. Integrating this condensate safety switch during routine maintenance or after a hard lockout ensures the system maintains its AHRI-rated efficiency while protecting the building from potential water damage. The lightweight, durable construction is designed for vertical or horizontal mounting depending on the specific boiler manifold configuration, ensuring a seamless HVAC part replacement without the need for field modifications.
Key Benefits:
- Prevents System Flooding: Automatically shuts down the firing cycle if a blocked drain is detected, protecting internal electronics and the heat exchanger.
- OEM Reliability: Built to exact Lochinvar and A.O. Smith specifications for consistent pressure-sensing accuracy compared to after-market alternatives.
- Direct Replacement: Replaces obsolete part numbers SWT2011, SWT2011K, and 100169481 with zero hardware adjustments required.
- Critical Safety Logic: Functions as a primary safety interlock, essential for maintaining code compliance in condensing boiler installations.
Common Questions:
How do I troubleshoot a "Blocked Drain SW Open" fault code?
First, check the condensate trap for debris or sludge buildup. If the trap is clear and the drain line has a proper pitch, use a multimeter to check for continuity across the 100208243 switch. If the switch remains open while the system is dry, the internal diaphragm has likely failed and the unit requires replacement.
Is this switch compatible with A.O. Smith water heaters?
Yes, as a shared component within the Lochinvar and A.O. Smith catalog, this part is used in various high-efficiency commercial and residential water heating units that utilize a condensate management system.
What causes this switch to fail prematurely?
While built for longevity, excessive mineral buildup from untreated condensate or severe pressure spikes in the venting system can fatigue the sensing element. Regular cleaning of the condensate neutralizer and trap is recommended to extend the life of the blocked drain switch.
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.
Lochinvar & A.O. Smith 100208243 Switch
The Lochinvar & A.O. Smith 100208243 Blocked Drain Switch is a critical safety component designed for high-efficiency condensing boilers and water heaters. As a veteran technician, you know that managing condensate is non-negotiable; this OEM replacement part (formerly SWT2011) proactively monitors for atmospheric pressure changes or liquid backup within the drain system. When a blockage is detected in the condensate trap or drainage line, the switch interrupts the 24V control circuit, triggering a "Blocked Drain SW Open" fault on the Smart Touch interface. This prevents corrosive condensate from backing up into the heat exchanger or burner assembly, which can cause unrecoverable damage to the combustion chamber.
This genuine Lochinvar 100208243 is engineered with a specialized .5A 100V SMD configuration to ensure precise sensitivity and reliability in harsh, high-humidity environments. It is a direct fit for a wide range of Lochinvar and A.O. Smith models, including the AWH0500NPM, AWN151PM, and AWN200PM series. Integrating this condensate safety switch during routine maintenance or after a hard lockout ensures the system maintains its AHRI-rated efficiency while protecting the building from potential water damage. The lightweight, durable construction is designed for vertical or horizontal mounting depending on the specific boiler manifold configuration, ensuring a seamless HVAC part replacement without the need for field modifications.
Key Benefits:
- Prevents System Flooding: Automatically shuts down the firing cycle if a blocked drain is detected, protecting internal electronics and the heat exchanger.
- OEM Reliability: Built to exact Lochinvar and A.O. Smith specifications for consistent pressure-sensing accuracy compared to after-market alternatives.
- Direct Replacement: Replaces obsolete part numbers SWT2011, SWT2011K, and 100169481 with zero hardware adjustments required.
- Critical Safety Logic: Functions as a primary safety interlock, essential for maintaining code compliance in condensing boiler installations.
Common Questions:
How do I troubleshoot a "Blocked Drain SW Open" fault code?
First, check the condensate trap for debris or sludge buildup. If the trap is clear and the drain line has a proper pitch, use a multimeter to check for continuity across the 100208243 switch. If the switch remains open while the system is dry, the internal diaphragm has likely failed and the unit requires replacement.
Is this switch compatible with A.O. Smith water heaters?
Yes, as a shared component within the Lochinvar and A.O. Smith catalog, this part is used in various high-efficiency commercial and residential water heating units that utilize a condensate management system.
What causes this switch to fail prematurely?
While built for longevity, excessive mineral buildup from untreated condensate or severe pressure spikes in the venting system can fatigue the sensing element. Regular cleaning of the condensate neutralizer and trap is recommended to extend the life of the blocked drain switch.
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 100208243 Blocked Drain Switch is a critical safety component designed for high-efficiency condensing boilers and water heaters. As a veteran technician, you know that managing condensate is non-negotiable; this OEM replacement part (formerly SWT2011) proactively monitors for atmospheric pressure changes or liquid backup within the drain system. When a blockage is detected in the condensate trap or drainage line, the switch interrupts the 24V control circuit, triggering a "Blocked Drain SW Open" fault on the Smart Touch interface. This prevents corrosive condensate from backing up into the heat exchanger or burner assembly, which can cause unrecoverable damage to the combustion chamber.
This genuine Lochinvar 100208243 is engineered with a specialized .5A 100V SMD configuration to ensure precise sensitivity and reliability in harsh, high-humidity environments. It is a direct fit for a wide range of Lochinvar and A.O. Smith models, including the AWH0500NPM, AWN151PM, and AWN200PM series. Integrating this condensate safety switch during routine maintenance or after a hard lockout ensures the system maintains its AHRI-rated efficiency while protecting the building from potential water damage. The lightweight, durable construction is designed for vertical or horizontal mounting depending on the specific boiler manifold configuration, ensuring a seamless HVAC part replacement without the need for field modifications.
Key Benefits:
- Prevents System Flooding: Automatically shuts down the firing cycle if a blocked drain is detected, protecting internal electronics and the heat exchanger.
- OEM Reliability: Built to exact Lochinvar and A.O. Smith specifications for consistent pressure-sensing accuracy compared to after-market alternatives.
- Direct Replacement: Replaces obsolete part numbers SWT2011, SWT2011K, and 100169481 with zero hardware adjustments required.
- Critical Safety Logic: Functions as a primary safety interlock, essential for maintaining code compliance in condensing boiler installations.
Common Questions:
How do I troubleshoot a "Blocked Drain SW Open" fault code?
First, check the condensate trap for debris or sludge buildup. If the trap is clear and the drain line has a proper pitch, use a multimeter to check for continuity across the 100208243 switch. If the switch remains open while the system is dry, the internal diaphragm has likely failed and the unit requires replacement.
Is this switch compatible with A.O. Smith water heaters?
Yes, as a shared component within the Lochinvar and A.O. Smith catalog, this part is used in various high-efficiency commercial and residential water heating units that utilize a condensate management system.
What causes this switch to fail prematurely?
While built for longevity, excessive mineral buildup from untreated condensate or severe pressure spikes in the venting system can fatigue the sensing element. Regular cleaning of the condensate neutralizer and trap is recommended to extend the life of the blocked drain switch.
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.
