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connect the sample line to the "H" (1/4") port
62-inch diameter and 6-inch width are calibrated to move air efficiently through the heat exchanger and evap coils
this specific model (100108926) is factory-configured for natural gas at 4" WC
even in low-light conditions
or complete failure to ignite the main burner
Lochinvar & A.O. Smith 100111019 Lower Probe 340155-7026 connect the sample line toThe Lochinvar & A. O. Smith 100111019 Lower Probe is a critical OEM replacement temperature sensor designed for commercial high efficiency water heaters. When you are troubleshooting erratic temperature swings or lockout codes on units like the Cyclone BTH, SUF, or HCG series, this immersion style probe is often the primary fix. It provides the central control board with precise thermistor data from the lower section of the tank to manage thermal
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