Lochinvar & A.O. Smith 100208231 Fuse 321042-401 Technical Compatibility: Fully interchangeable with

Technical Compatibility: Fully interchangeable with HKN-3153684

this device provides accurate ambient temperature monitoring to ensure consistent environmental control

leak-free installation into the gas train

Replacing a compromised limit control ensures system reliability and prevents nuisance tripping caused by weakened internal thermal discs or high-resistance electrical connections frequently seen in aging residential HVAC systems

Prevents soot accumulation and heat exchanger fatigue caused by improper fuel mixtures

Lochinvar & A.O. Smith 100208231 Fuse 321042-401 Technical Compatibility: Fully interchangeable withThe Lochinvar & A. O. Smith 100208231 Fuse is a critical 3. 15 Amp 250V slow blow glass fuse designed specifically for the protection of integrated control boards in high efficiency commercial boilers and water heaters. As a direct OEM replacement part, this 5x20mm cartridge fuse ensures the sensitive electronics of the Lochinvar Knight and Armor series, as well as various A. O. Smith Cyclone models, remain protected from overcurrent events and