you should see a reading between 650mV and 750mV under no-load conditions

providing stable performance in both heating and cooling modes

or if the burner faces are "waist-ing" out

making it a reliable solution for commercial HVAC repair and boiler maintenance

Always verify the terminal legend and timing ranges (on/off delays) before installing

Reznor 101916 Heater Control 320788-702 you should see a readingThe Reznor 101916 Heater Control is a critical oil primary heater control assembly engineered specifically for Reznor oil fired heating systems. As a genuine OEM Reznor replacement part, this component manages the ignition and flame sensing sequence, ensuring the burner operates safely and efficiently. For technicians servicing industrial or commercial units, the 101916 provides the precise timing and voltage regulation required to maintain system