Laars Heating Systems RTXD7109 Replace Kit 321894-709 and the required air inlet

and the required air inlet shield

a light almond full-window cover

the high limit switch ensures a rapid and reliable electrical break to prevent heat exchanger damage and hazardous operating conditions

Standard field practice dictates replacing the bi-flow drier whenever the sealed system is opened for repairs

Laars Heating Systems RTXD7109 Replace Kit 321894-709 and the required air inletThe Laars Heating Systems RTXD7109 Replace Kit is a direct OEM solution for restoring the Neotherm Wave 3 4A control architecture. Engineered for high efficiency condensing boilers and volume water heaters, this Neotherm Module Replace Kit serves as the central processing unit for system modulation and safety logic. As a veteran grade HVAC replacement part, it handles critical functions including integrated PID temperature control, direct spark