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Precision Engineering: Designed for direct compatibility with A-4300 series components to prevent air leaks and pressure drops
always verify media compatibility with the brass and internal rubber components before installation
Common Questions Is the 8406-037BX an exact replacement for the standard 8406-037
a Laars boiler control board repair or swap should be executed by a licensed technician to maintain the structural integrity and sequencing logic of the appliance
it incorporates dual-seated safety logic to prevent gas leakage if primary controls fail
Robertshaw 780U-DS20 Ignition Module 326058-756 Precision Engineering: Designed for directRobertshaw 780U DS20 is a universal direct spark ignition (DSI) control module designed for gas fired HVAC equipment, including furnaces, boilers, and rooftop units. This ignition control is used to safely manage burner ignition sequences by providing timed spark ignition and flame sensing for reliable system startup and operation. The module is commonly used as a replacement ignition control in systems requiring a universal solution for direct spark
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