Resetting Propex HS-Series Heater Fault Codes
Posted by Propex North America on Mar 26th 2025
When the Propex HS-series heater encounters conditions outside the parameters for safe operation, the logic circuits on the main circuit board may throw a fault code. This self-diagnostic feature helps protect the user and the heater unit itself and also points the user in the right direction for diagnosing the issue. The procedure for resetting a fault code is simple with the Propex heater but requires attention to the timing of the reset operation.
DIGITIAL THERMOSTAT: To reset your Propex HS-series heater with a digital thermostat, you'll just need a paperclip or something similar. Check out the video below for the procedure:
ANALOG THERMOSTAT: To reset your Propex heater with an analog thermostat, turn the thermostat temperature knob to full hot and then turn the operation dial from OFF to FAN to FLAME then to FAN to OFF then again from OFF to FAN to FLAME. The speed at which you turn the dial is extremely important, just under a second each direction. Please see the video below for an illustration of the timing of the procedure: