Robertshaw 780-790 HSI Module 30067439-890 Correct sizing is non-negotiable for

Correct sizing is non-negotiable for service technicians

this straight-thru body flow valve ensures minimal pressure drop across the orifice

Product Features and Contractor Benefits 10K Ohm Type II Thermistor: Provides a standard resistance curve compatible with various DDC controllers

The Conbraco 13-211-B08 is a heavy-duty

Robertshaw 780-790 HSI Module 30067439-890 Correct sizing is non-negotiable forFor field techs dealing with intermittent ignition failures or flame sensing issues on gas fired heating systems, the Robertshaw 780 790 HSI Module provides a reliable, direct replacement solution. This hot surface ignition control is engineered to drop into tight control cabinets, serving as the primary replacement for the HS780 17NL 304A as well as the 104A and 108A variants. Operating on a standard 120V AC ignition system, the module features a