System Modernization: Replaces obsolete Honeywell and Johnson Control ignition systems with current UCS technology

If the transformer is failing

diagnostic error codes

The Honeywell 311852 is technically identical to the 311852/U (universal) model

The York S1-373-06239-700 is an OEM-spec 11 x 10 blower housing engineered for high-static pressure applications within residential and light commercial air handlers

Lochinvar & A.O. Smith 100109355 Ignitor Assembly 326058-757 System Modernization: Replaces obsolete HoneywellThe Lochinvar & A. O. Smith 100109355 Ignitor Assembly is a mission critical hot surface igniter (HSI) replacement designed for high efficiency natural gas (NG) water heaters. Engineered to meet strict OEM specifications, this assembly functions as the primary ignition source for the burner, ensuring reliable light off and consistent flame rectification. As the direct updated replacement for the legacy 9003626005 part number, the 100109355 features a