Lochinvar & A.O. Smith 100208388 Pressure Switch
The Lochinvar & A.O. Smith 100208388 Pressure Switch is a critical 1" WC (Water Column) safety component designed for high-efficiency boiler and water heater systems. As an authentic OEM replacement part, it ensures the inducer motor is pulling the correct draft before the ignition sequence begins. Rated at 1.0" WC, this single-pole, double-throw (SPDT) switch is engineered to monitor combustion air pressure and prevent operation under unsafe venting conditions, such as blocked intakes or exhaust restrictions. This HVAC pressure switch is a direct replacement for legacy part numbers PRS20032, 100166127, and PRS20032K, maintaining exact factory specifications for 1/4" NPT connections.
For technicians servicing Lochinvar FBL2500 or FBN6000 models, this 1" WC pressure switch provides the precise set point required to avoid nuisance short cycling or system lockouts. The 100208388 features a durable sensing diaphragm housed in a robust casing, designed to withstand the high-temperature environment of a commercial mechanical room. Whether you are troubleshooting an A.O. Smith water heater that fails to fire or performing preventative maintenance on a Lochinvar boiler, using genuine 100208388 boiler parts is essential for maintaining UL/CSA certification and ensuring reliable pressure signal detection across the entire firing range.
Key Benefits:- Precise 1" WC Calibration: Factory-set to ensure accurate induced draft monitoring and safe combustion cycles.
- OEM Compatibility: Guaranteed fit for Lochinvar and A.O. Smith equipment, replacing obsolete PRS20032 and 100166127 units.
- Universal 1/4" NPT Port: Standard connection size allows for straightforward integration with existing pressure switch tubing and sensing lines.
- SPDT Electrical Configuration: Single-pole, double-throw design provides versatile signaling for both normally open and normally closed safety circuits.
- Durable Construction: Engineered to eliminate diaphragm failure and mechanical jamming common in non-OEM HVAC parts.
Why is my unit showing a pressure switch lockout code?
Lockouts typically occur if the 100208388 switch fails to close due to a cracked sensing tube, a blocked flue vent, or a failing inducer motor that cannot reach the required 1.0" WC vacuum.
Can I use this switch to replace a different WC rating?
No. Pressure switches are safety-critical components calibrated to specific air-flow requirements. Using a switch with a different Water Column rating can cause dangerous combustion issues or premature component wear.
How do I test if the pressure switch is actually bad?
Use a digital manometer to verify the inducer is pulling at least 1.0" WC. If the pressure is sufficient but the switch contacts do not show continuity on your multimeter, the internal diaphragm or microswitch is likely defective.
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: $216.81
-65%$216.81
$75.88Lochinvar & A.O. Smith 100208388 Pressure Switch
The Lochinvar & A.O. Smith 100208388 Pressure Switch is a critical 1" WC (Water Column) safety component designed for high-efficiency boiler and water heater systems. As an authentic OEM replacement part, it ensures the inducer motor is pulling the correct draft before the ignition sequence begins. Rated at 1.0" WC, this single-pole, double-throw (SPDT) switch is engineered to monitor combustion air pressure and prevent operation under unsafe venting conditions, such as blocked intakes or exhaust restrictions. This HVAC pressure switch is a direct replacement for legacy part numbers PRS20032, 100166127, and PRS20032K, maintaining exact factory specifications for 1/4" NPT connections.
For technicians servicing Lochinvar FBL2500 or FBN6000 models, this 1" WC pressure switch provides the precise set point required to avoid nuisance short cycling or system lockouts. The 100208388 features a durable sensing diaphragm housed in a robust casing, designed to withstand the high-temperature environment of a commercial mechanical room. Whether you are troubleshooting an A.O. Smith water heater that fails to fire or performing preventative maintenance on a Lochinvar boiler, using genuine 100208388 boiler parts is essential for maintaining UL/CSA certification and ensuring reliable pressure signal detection across the entire firing range.
Key Benefits:- Precise 1" WC Calibration: Factory-set to ensure accurate induced draft monitoring and safe combustion cycles.
- OEM Compatibility: Guaranteed fit for Lochinvar and A.O. Smith equipment, replacing obsolete PRS20032 and 100166127 units.
- Universal 1/4" NPT Port: Standard connection size allows for straightforward integration with existing pressure switch tubing and sensing lines.
- SPDT Electrical Configuration: Single-pole, double-throw design provides versatile signaling for both normally open and normally closed safety circuits.
- Durable Construction: Engineered to eliminate diaphragm failure and mechanical jamming common in non-OEM HVAC parts.
Why is my unit showing a pressure switch lockout code?
Lockouts typically occur if the 100208388 switch fails to close due to a cracked sensing tube, a blocked flue vent, or a failing inducer motor that cannot reach the required 1.0" WC vacuum.
Can I use this switch to replace a different WC rating?
No. Pressure switches are safety-critical components calibrated to specific air-flow requirements. Using a switch with a different Water Column rating can cause dangerous combustion issues or premature component wear.
How do I test if the pressure switch is actually bad?
Use a digital manometer to verify the inducer is pulling at least 1.0" WC. If the pressure is sufficient but the switch contacts do not show continuity on your multimeter, the internal diaphragm or microswitch is likely defective.
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
Shipping & Returns
Shipping & Returns
Description
The Lochinvar & A.O. Smith 100208388 Pressure Switch is a critical 1" WC (Water Column) safety component designed for high-efficiency boiler and water heater systems. As an authentic OEM replacement part, it ensures the inducer motor is pulling the correct draft before the ignition sequence begins. Rated at 1.0" WC, this single-pole, double-throw (SPDT) switch is engineered to monitor combustion air pressure and prevent operation under unsafe venting conditions, such as blocked intakes or exhaust restrictions. This HVAC pressure switch is a direct replacement for legacy part numbers PRS20032, 100166127, and PRS20032K, maintaining exact factory specifications for 1/4" NPT connections.
For technicians servicing Lochinvar FBL2500 or FBN6000 models, this 1" WC pressure switch provides the precise set point required to avoid nuisance short cycling or system lockouts. The 100208388 features a durable sensing diaphragm housed in a robust casing, designed to withstand the high-temperature environment of a commercial mechanical room. Whether you are troubleshooting an A.O. Smith water heater that fails to fire or performing preventative maintenance on a Lochinvar boiler, using genuine 100208388 boiler parts is essential for maintaining UL/CSA certification and ensuring reliable pressure signal detection across the entire firing range.
Key Benefits:- Precise 1" WC Calibration: Factory-set to ensure accurate induced draft monitoring and safe combustion cycles.
- OEM Compatibility: Guaranteed fit for Lochinvar and A.O. Smith equipment, replacing obsolete PRS20032 and 100166127 units.
- Universal 1/4" NPT Port: Standard connection size allows for straightforward integration with existing pressure switch tubing and sensing lines.
- SPDT Electrical Configuration: Single-pole, double-throw design provides versatile signaling for both normally open and normally closed safety circuits.
- Durable Construction: Engineered to eliminate diaphragm failure and mechanical jamming common in non-OEM HVAC parts.
Why is my unit showing a pressure switch lockout code?
Lockouts typically occur if the 100208388 switch fails to close due to a cracked sensing tube, a blocked flue vent, or a failing inducer motor that cannot reach the required 1.0" WC vacuum.
Can I use this switch to replace a different WC rating?
No. Pressure switches are safety-critical components calibrated to specific air-flow requirements. Using a switch with a different Water Column rating can cause dangerous combustion issues or premature component wear.
How do I test if the pressure switch is actually bad?
Use a digital manometer to verify the inducer is pulling at least 1.0" WC. If the pressure is sufficient but the switch contacts do not show continuity on your multimeter, the internal diaphragm or microswitch is likely defective.
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.
