and VB-131 models

By consolidating ignition

250 BTU/hr gas handling

Direct OEM Compatibility: Specifically engineered for Trane and American Standard units to ensure correct microfarad tolerance and electrical performance

Lochinvar & A.O. Smith 100173799 Door Kit 319847-401 and VB-131 modelsThe Lochinvar & A. O. Smith 100173799 Door Kit is a field critical heat exchanger access door kit designed for high efficiency hydronic boilers and volume water heaters. This OEM assembly, which is functionally identical to WTR3086, serves as the primary seal for the combustion chamber, ensuring proper pressure vessel integrity and thermal containment. When performing a Lochinvar heat exchanger cleaning, replacing the door kit is essential to restore