Lochinvar & A.O. Smith 100208807 Fuse
This Lochinvar & A.O. Smith 100208807 Fuse is a critical 1.25 amp time delay fuse engineered for heavy-duty circuit protection in commercial and residential hydronic systems. Rated for 250V, this Class T component is designed to handle the temporary inrush currents typical of main control boards and blower assemblies without nuisance tripping. As an OEM replacement part, it ensures the electrical integrity of the system by shielding sensitive microprocessors and gas valves from overcurrent spikes. Consistent with A.O. Smith and Lochinvar engineering standards, this fuse is the primary safeguard for the integrated boiler control (IBC), preventing costly module failures due to electrical surges or component shorts.
Field-verified compatibility includes high-efficiency units such as the Lochinvar Knight Boiler series, specifically models like the AWH0500NPM, AWN series, and the SLA/SNA Shield models. In these systems, this 1.25A glass fuse (or ceramic equivalent depending on specific batch specifications) is often located in the F3 slot to protect the main board circuitry. For technicians servicing FB series boilers or SWA commercial water heaters, maintaining an inventory of these 100208807 fuses is essential for restoring operation after power fluctuations. Its precise slow-blow clear-glass or opaque body design allows for rapid diagnostic inspection during routine maintenance calls.
Key Benefits- Optimized Overcurrent Shielding: Specifically rated at 1.25 Amps to protect A.O. Smith and Lochinvar control modules from terminal damage.
- Time-Delay Functionality: Built with slow-blow characteristics to allow for normal start-up surges while responding quickly to genuine short circuits.
- Broad Platform Compatibility: Direct fit for the Lochinvar Knight and FBN series, ensuring the 250 Volt electrical path remains secure.
- Precision OEM Specs: Matches the exact technical specifications of factory-original components to maintain the safety certification of the appliance.
Where is the 100208807 fuse typically located in a Lochinvar boiler?
In most Knight Boiler models, this fuse is located on the main control board, often designated as F3. Always isolate the 120V power supply before attempting to inspect or replace any internal fuses.
What causes a 1.25 amp fuse to trip repeatedly in a heating system?
Frequent tripping usually indicates an overcurrent issue, often traced to a failing inducer motor, a short in the 24V transformer circuit, or a failing gas valve solenoid. Test these components for proper resistance if the fuse blows immediately upon replacement.
Can I use a standard 1.25A fast-acting fuse instead of this OEM part?
No. Using a fast-acting fuse in place of the 100208807 time delay fuse will result in nuisance tripping during the initial power-up of the control board or igniter cycle. The technical delay is necessary for stable operation.
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: $16.82
-65%$16.82
$5.89Lochinvar & A.O. Smith 100208807 Fuse
This Lochinvar & A.O. Smith 100208807 Fuse is a critical 1.25 amp time delay fuse engineered for heavy-duty circuit protection in commercial and residential hydronic systems. Rated for 250V, this Class T component is designed to handle the temporary inrush currents typical of main control boards and blower assemblies without nuisance tripping. As an OEM replacement part, it ensures the electrical integrity of the system by shielding sensitive microprocessors and gas valves from overcurrent spikes. Consistent with A.O. Smith and Lochinvar engineering standards, this fuse is the primary safeguard for the integrated boiler control (IBC), preventing costly module failures due to electrical surges or component shorts.
Field-verified compatibility includes high-efficiency units such as the Lochinvar Knight Boiler series, specifically models like the AWH0500NPM, AWN series, and the SLA/SNA Shield models. In these systems, this 1.25A glass fuse (or ceramic equivalent depending on specific batch specifications) is often located in the F3 slot to protect the main board circuitry. For technicians servicing FB series boilers or SWA commercial water heaters, maintaining an inventory of these 100208807 fuses is essential for restoring operation after power fluctuations. Its precise slow-blow clear-glass or opaque body design allows for rapid diagnostic inspection during routine maintenance calls.
Key Benefits- Optimized Overcurrent Shielding: Specifically rated at 1.25 Amps to protect A.O. Smith and Lochinvar control modules from terminal damage.
- Time-Delay Functionality: Built with slow-blow characteristics to allow for normal start-up surges while responding quickly to genuine short circuits.
- Broad Platform Compatibility: Direct fit for the Lochinvar Knight and FBN series, ensuring the 250 Volt electrical path remains secure.
- Precision OEM Specs: Matches the exact technical specifications of factory-original components to maintain the safety certification of the appliance.
Where is the 100208807 fuse typically located in a Lochinvar boiler?
In most Knight Boiler models, this fuse is located on the main control board, often designated as F3. Always isolate the 120V power supply before attempting to inspect or replace any internal fuses.
What causes a 1.25 amp fuse to trip repeatedly in a heating system?
Frequent tripping usually indicates an overcurrent issue, often traced to a failing inducer motor, a short in the 24V transformer circuit, or a failing gas valve solenoid. Test these components for proper resistance if the fuse blows immediately upon replacement.
Can I use a standard 1.25A fast-acting fuse instead of this OEM part?
No. Using a fast-acting fuse in place of the 100208807 time delay fuse will result in nuisance tripping during the initial power-up of the control board or igniter cycle. The technical delay is necessary for stable operation.
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
This Lochinvar & A.O. Smith 100208807 Fuse is a critical 1.25 amp time delay fuse engineered for heavy-duty circuit protection in commercial and residential hydronic systems. Rated for 250V, this Class T component is designed to handle the temporary inrush currents typical of main control boards and blower assemblies without nuisance tripping. As an OEM replacement part, it ensures the electrical integrity of the system by shielding sensitive microprocessors and gas valves from overcurrent spikes. Consistent with A.O. Smith and Lochinvar engineering standards, this fuse is the primary safeguard for the integrated boiler control (IBC), preventing costly module failures due to electrical surges or component shorts.
Field-verified compatibility includes high-efficiency units such as the Lochinvar Knight Boiler series, specifically models like the AWH0500NPM, AWN series, and the SLA/SNA Shield models. In these systems, this 1.25A glass fuse (or ceramic equivalent depending on specific batch specifications) is often located in the F3 slot to protect the main board circuitry. For technicians servicing FB series boilers or SWA commercial water heaters, maintaining an inventory of these 100208807 fuses is essential for restoring operation after power fluctuations. Its precise slow-blow clear-glass or opaque body design allows for rapid diagnostic inspection during routine maintenance calls.
Key Benefits- Optimized Overcurrent Shielding: Specifically rated at 1.25 Amps to protect A.O. Smith and Lochinvar control modules from terminal damage.
- Time-Delay Functionality: Built with slow-blow characteristics to allow for normal start-up surges while responding quickly to genuine short circuits.
- Broad Platform Compatibility: Direct fit for the Lochinvar Knight and FBN series, ensuring the 250 Volt electrical path remains secure.
- Precision OEM Specs: Matches the exact technical specifications of factory-original components to maintain the safety certification of the appliance.
Where is the 100208807 fuse typically located in a Lochinvar boiler?
In most Knight Boiler models, this fuse is located on the main control board, often designated as F3. Always isolate the 120V power supply before attempting to inspect or replace any internal fuses.
What causes a 1.25 amp fuse to trip repeatedly in a heating system?
Frequent tripping usually indicates an overcurrent issue, often traced to a failing inducer motor, a short in the 24V transformer circuit, or a failing gas valve solenoid. Test these components for proper resistance if the fuse blows immediately upon replacement.
Can I use a standard 1.25A fast-acting fuse instead of this OEM part?
No. Using a fast-acting fuse in place of the 100208807 time delay fuse will result in nuisance tripping during the initial power-up of the control board or igniter cycle. The technical delay is necessary for stable operation.
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.
