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the "MTZ" version with POE oil is required
When should I replace my furnace limit switch
System Compatibility: Explicitly designed to integrate with McDonnell & Miller RS Sensors and high-performance level controllers
the issue likely resides in the control board or the wiring harness
Lochinvar & A.O. Smith 100278106 Vent Damper 323613-751 the "MTZ" version with POEThe Lochinvar & A. O. Smith 100278106 Vent Damper is a critical OEM replacement component designed specifically for 7 inch flue applications. Engineered for compatibility with RB RW225 270 boiler and water heater models, this automatic vent damper enhances system efficiency by preventing standby heat loss through the stack. When the burner cycle completes, the motorized actuator closes the baffle, trapping residual heat within the heat exchanger to
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