Robertshaw 780-790 HSI Module 30067439-890 This product is restricted to

This product is restricted to the Lower 48 states

This AACE-Series model is designed for high-performance 5-ton expansion valve applications

The integrated Schrader access port allows for simplified pressure monitoring and system charging without breaking the primary line

while the internal 20-micron filtration pad prevents particulate matter from clogging expansion valves or capillary tubes

frequent error codes related to sensor limit faults

Robertshaw 780-790 HSI Module 30067439-890 This product is restricted toFor 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