Lochinvar & A.O. Smith 100277756 LWCO Probe
The Lochinvar & A.O. Smith 100277756 LWCO Probe is a critical safety component designed for low water cut-off protection in high-efficiency commercial boilers and water heaters. Engineered as a short-length conductance-type probe, this genuine OEM part (often referenced as WTR20011K) ensures the burner circuit is interrupted if water levels drop below the safe operating threshold, preventing catastrophic dry-fire conditions. It is specifically compatible with a wide range of Lochinvar Knight and A.O. Smith Legend models, including the 0751, 1001, 1251, 1501, 1751, and 2001 series. The probe utilizes high-grade stainless steel construction with robust insulation to maintain signal integrity and resist mineral scale buildup in closed-loop hydronic systems. For professional contractors, this 100277756 replacement probe provides a reliable, direct-fit solution for restoring CSD-1 compliance and system safety without the need for field modifications. Regular inspection of the LWCO electrode is recommended to ensure accurate conductivity sensing and prevent nuisance lockouts caused by probe fouling.
Key Benefits- Direct OEM Compatibility: Engineered for precision fitment in Lochinvar Knight and A.O. Smith Legend boilers, ensuring seamless integration with existing control boards.
- Dry-Fire Prevention: Provides essential low water cut-off protection by sensing the presence of water through electrical conductance.
- Durable Construction: Features a high-temp resistant short probe design to withstand the demanding thermal environment of commercial heat exchangers.
- System Safety Compliance: Helps maintain adherence to ASME CSD-1 requirements for secondary low water fuel cutoffs.
How do I troubleshoot a 100277756 probe if the boiler is locking out on low water?
First, verify that the water level is actually at the correct height. If it is, the probe may be fouled with mineral deposits; cleaning the probe with a non-conductive abrasive pad often restores the signal. If the lockout persists, check for continuity to ground and inspect the wiring harness for heat damage.
Can I use this short probe as a replacement for long-style probes?
No. It is vital to use the specific length and part number designated by the manufacturer’s manual for your specific model (e.g., Lochinvar 100277756). Using the wrong length can result in the probe failing to detect a dangerous low-water condition or causing premature shutdowns.
What is the typical cause of LWCO probe failure?
The most frequent issues include scale accumulation, which insulates the probe from the water, or a breakdown of the ceramic insulator, which can cause a short to ground. In systems with poor water chemistry, these probes may require more frequent inspection.
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: $71.57
-65%$71.57
$25.05Lochinvar & A.O. Smith 100277756 LWCO Probe
The Lochinvar & A.O. Smith 100277756 LWCO Probe is a critical safety component designed for low water cut-off protection in high-efficiency commercial boilers and water heaters. Engineered as a short-length conductance-type probe, this genuine OEM part (often referenced as WTR20011K) ensures the burner circuit is interrupted if water levels drop below the safe operating threshold, preventing catastrophic dry-fire conditions. It is specifically compatible with a wide range of Lochinvar Knight and A.O. Smith Legend models, including the 0751, 1001, 1251, 1501, 1751, and 2001 series. The probe utilizes high-grade stainless steel construction with robust insulation to maintain signal integrity and resist mineral scale buildup in closed-loop hydronic systems. For professional contractors, this 100277756 replacement probe provides a reliable, direct-fit solution for restoring CSD-1 compliance and system safety without the need for field modifications. Regular inspection of the LWCO electrode is recommended to ensure accurate conductivity sensing and prevent nuisance lockouts caused by probe fouling.
Key Benefits- Direct OEM Compatibility: Engineered for precision fitment in Lochinvar Knight and A.O. Smith Legend boilers, ensuring seamless integration with existing control boards.
- Dry-Fire Prevention: Provides essential low water cut-off protection by sensing the presence of water through electrical conductance.
- Durable Construction: Features a high-temp resistant short probe design to withstand the demanding thermal environment of commercial heat exchangers.
- System Safety Compliance: Helps maintain adherence to ASME CSD-1 requirements for secondary low water fuel cutoffs.
How do I troubleshoot a 100277756 probe if the boiler is locking out on low water?
First, verify that the water level is actually at the correct height. If it is, the probe may be fouled with mineral deposits; cleaning the probe with a non-conductive abrasive pad often restores the signal. If the lockout persists, check for continuity to ground and inspect the wiring harness for heat damage.
Can I use this short probe as a replacement for long-style probes?
No. It is vital to use the specific length and part number designated by the manufacturer’s manual for your specific model (e.g., Lochinvar 100277756). Using the wrong length can result in the probe failing to detect a dangerous low-water condition or causing premature shutdowns.
What is the typical cause of LWCO probe failure?
The most frequent issues include scale accumulation, which insulates the probe from the water, or a breakdown of the ceramic insulator, which can cause a short to ground. In systems with poor water chemistry, these probes may require more frequent inspection.
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 100277756 LWCO Probe is a critical safety component designed for low water cut-off protection in high-efficiency commercial boilers and water heaters. Engineered as a short-length conductance-type probe, this genuine OEM part (often referenced as WTR20011K) ensures the burner circuit is interrupted if water levels drop below the safe operating threshold, preventing catastrophic dry-fire conditions. It is specifically compatible with a wide range of Lochinvar Knight and A.O. Smith Legend models, including the 0751, 1001, 1251, 1501, 1751, and 2001 series. The probe utilizes high-grade stainless steel construction with robust insulation to maintain signal integrity and resist mineral scale buildup in closed-loop hydronic systems. For professional contractors, this 100277756 replacement probe provides a reliable, direct-fit solution for restoring CSD-1 compliance and system safety without the need for field modifications. Regular inspection of the LWCO electrode is recommended to ensure accurate conductivity sensing and prevent nuisance lockouts caused by probe fouling.
Key Benefits- Direct OEM Compatibility: Engineered for precision fitment in Lochinvar Knight and A.O. Smith Legend boilers, ensuring seamless integration with existing control boards.
- Dry-Fire Prevention: Provides essential low water cut-off protection by sensing the presence of water through electrical conductance.
- Durable Construction: Features a high-temp resistant short probe design to withstand the demanding thermal environment of commercial heat exchangers.
- System Safety Compliance: Helps maintain adherence to ASME CSD-1 requirements for secondary low water fuel cutoffs.
How do I troubleshoot a 100277756 probe if the boiler is locking out on low water?
First, verify that the water level is actually at the correct height. If it is, the probe may be fouled with mineral deposits; cleaning the probe with a non-conductive abrasive pad often restores the signal. If the lockout persists, check for continuity to ground and inspect the wiring harness for heat damage.
Can I use this short probe as a replacement for long-style probes?
No. It is vital to use the specific length and part number designated by the manufacturer’s manual for your specific model (e.g., Lochinvar 100277756). Using the wrong length can result in the probe failing to detect a dangerous low-water condition or causing premature shutdowns.
What is the typical cause of LWCO probe failure?
The most frequent issues include scale accumulation, which insulates the probe from the water, or a breakdown of the ceramic insulator, which can cause a short to ground. In systems with poor water chemistry, these probes may require more frequent inspection.
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.
