F0
Software and sensor errors
Worcester Bosch Greenstar Heatslave II
Cause 237 (Blocking)
Software relay error. Resistors between plug X4 pins 3 & 5 disconnected/>150k or water in the burner control box
Action
Reset
Cause 238 (Blocking)
Software relay error. Resistors between plug X4 pins 3 & 5 disconnected/>150k or water in the burner control box
Action
Reset
Cause 239 (Blocking)
Watchdog relay error. If the error persists, change the control board
Action
Reset
Cause 259 (Blocking)
A/D reference relay error. If the error persists, change the control board
Action
Reset
Cause 263 (Blocking)
Appliance powered off with locking fault present. Locking fault still present when powered off/on, press the reset button to clear.
Action
Reset
Cause 278 (Blocking)
Sensor test error. On power up, all safety sensors are checked. Check has failed.
Action
Reset
Cause 279 (Blocking)
A/D converter error. If the error persists, change the control board
Action
Reset
Cause 290 (Blocking)
A/D converter reference error. If the error persists, change the control board
Action
Reset
This code also applies to: