Lochinvar & A.O. Smith 100208377 Pressure Switch
The Lochinvar & A.O. Smith 100208377 Pressure Switch is a critical safety component designed for precise combustion blower monitoring in high-efficiency condensing water heaters and boilers. This OEM pressure switch kit is factory-calibrated to a 3.00" WC (Water Column) set point, ensuring the integrated control board verifies proper venting and inducer fan performance before allowing the ignition sequence to proceed. It is a direct replacement for Lochinvar Armor AW models (150-285) and A.O. Smith SNA series units, providing the reliable normally open contact logic required for HVAC system diagnostics and safe operation. As a technical replacement part, it is engineered to withstand the demanding conditions of commercial and residential heating applications, preventing flue gas spillage by disabling the burner if the differential pressure falls below the safety threshold. Professional installation is recommended to ensure the sensing tube remains free of condensate or debris, which can cause pressure switch failed open error codes.
Key Benefits for Contractors:
- Exact OEM Calibration: Pre-set to 3.00 inch water column specifically for Lochinvar AWN151PM, AWN286PM, and A.O. Smith high-efficiency boilers.
- Reliable Safety Integration: Monitors exhaust vent pressure to ensure hazardous combustion gases are properly evacuated before ignition.
- Simplified Troubleshooting: Resolves common 3-flash error codes related to pressure switch circuit failures and blower proving issues.
- Durable Construction: Engineered for HVAC repair professionals needing a high-cycle diaphragm that maintains accuracy over time.
Common Questions Regarding the 100208377 Switch:
Why is my water heater throwing a 3-flash pressure switch error?
This usually indicates the 100208377 pressure switch has failed to close. Check for a restricted flue vent, a failing inducer fan, or a clogged sensing tube. If the fan is at full speed but the switch remains open, the diaphragm may be damaged.
Does this switch work with both Lochinvar and A.O. Smith models?
Yes, as an genuine OEM replacement part, it is cross-functional across several Armor and SNA/SLA series condensing units from both brands that require a 3" WC trigger point.
Can I use a universal pressure switch instead of the 100208377?
It is highly discouraged. Modern condensing water heaters rely on specific set points for safe combustion monitoring. Using a switch with a different WC rating can lead to inefficient combustion or dangerous carbon monoxide levels.
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 100208377 Pressure Switch
The Lochinvar & A.O. Smith 100208377 Pressure Switch is a critical safety component designed for precise combustion blower monitoring in high-efficiency condensing water heaters and boilers. This OEM pressure switch kit is factory-calibrated to a 3.00" WC (Water Column) set point, ensuring the integrated control board verifies proper venting and inducer fan performance before allowing the ignition sequence to proceed. It is a direct replacement for Lochinvar Armor AW models (150-285) and A.O. Smith SNA series units, providing the reliable normally open contact logic required for HVAC system diagnostics and safe operation. As a technical replacement part, it is engineered to withstand the demanding conditions of commercial and residential heating applications, preventing flue gas spillage by disabling the burner if the differential pressure falls below the safety threshold. Professional installation is recommended to ensure the sensing tube remains free of condensate or debris, which can cause pressure switch failed open error codes.
Key Benefits for Contractors:
- Exact OEM Calibration: Pre-set to 3.00 inch water column specifically for Lochinvar AWN151PM, AWN286PM, and A.O. Smith high-efficiency boilers.
- Reliable Safety Integration: Monitors exhaust vent pressure to ensure hazardous combustion gases are properly evacuated before ignition.
- Simplified Troubleshooting: Resolves common 3-flash error codes related to pressure switch circuit failures and blower proving issues.
- Durable Construction: Engineered for HVAC repair professionals needing a high-cycle diaphragm that maintains accuracy over time.
Common Questions Regarding the 100208377 Switch:
Why is my water heater throwing a 3-flash pressure switch error?
This usually indicates the 100208377 pressure switch has failed to close. Check for a restricted flue vent, a failing inducer fan, or a clogged sensing tube. If the fan is at full speed but the switch remains open, the diaphragm may be damaged.
Does this switch work with both Lochinvar and A.O. Smith models?
Yes, as an genuine OEM replacement part, it is cross-functional across several Armor and SNA/SLA series condensing units from both brands that require a 3" WC trigger point.
Can I use a universal pressure switch instead of the 100208377?
It is highly discouraged. Modern condensing water heaters rely on specific set points for safe combustion monitoring. Using a switch with a different WC rating can lead to inefficient combustion or dangerous carbon monoxide levels.
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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Description
The Lochinvar & A.O. Smith 100208377 Pressure Switch is a critical safety component designed for precise combustion blower monitoring in high-efficiency condensing water heaters and boilers. This OEM pressure switch kit is factory-calibrated to a 3.00" WC (Water Column) set point, ensuring the integrated control board verifies proper venting and inducer fan performance before allowing the ignition sequence to proceed. It is a direct replacement for Lochinvar Armor AW models (150-285) and A.O. Smith SNA series units, providing the reliable normally open contact logic required for HVAC system diagnostics and safe operation. As a technical replacement part, it is engineered to withstand the demanding conditions of commercial and residential heating applications, preventing flue gas spillage by disabling the burner if the differential pressure falls below the safety threshold. Professional installation is recommended to ensure the sensing tube remains free of condensate or debris, which can cause pressure switch failed open error codes.
Key Benefits for Contractors:
- Exact OEM Calibration: Pre-set to 3.00 inch water column specifically for Lochinvar AWN151PM, AWN286PM, and A.O. Smith high-efficiency boilers.
- Reliable Safety Integration: Monitors exhaust vent pressure to ensure hazardous combustion gases are properly evacuated before ignition.
- Simplified Troubleshooting: Resolves common 3-flash error codes related to pressure switch circuit failures and blower proving issues.
- Durable Construction: Engineered for HVAC repair professionals needing a high-cycle diaphragm that maintains accuracy over time.
Common Questions Regarding the 100208377 Switch:
Why is my water heater throwing a 3-flash pressure switch error?
This usually indicates the 100208377 pressure switch has failed to close. Check for a restricted flue vent, a failing inducer fan, or a clogged sensing tube. If the fan is at full speed but the switch remains open, the diaphragm may be damaged.
Does this switch work with both Lochinvar and A.O. Smith models?
Yes, as an genuine OEM replacement part, it is cross-functional across several Armor and SNA/SLA series condensing units from both brands that require a 3" WC trigger point.
Can I use a universal pressure switch instead of the 100208377?
It is highly discouraged. Modern condensing water heaters rely on specific set points for safe combustion monitoring. Using a switch with a different WC rating can lead to inefficient combustion or dangerous carbon monoxide levels.
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.
