Possible causes:
1. Has open window detection been triggered? If so, the heater will not heat. Look for an open window icon on the main display. To enable/disable: Press “config” button, hold down “config” for 5 seconds until the screen shows C1. Press + until the screen shows C5. Press MODE/OK. The open window icon should appear alongside ON or OFF. Adjust between ON and OFF using the + and - buttons. Press MODE/OK to confirm and exit the menu.
2. Is the thermostat accuracy too low or set to minutes instead of temperature drop? To check and adjust, press “config” button then hold down “config” for 5 seconds until the screen shows C1. Press + until screen shows C2. Press MODE/OK. Using the + and – keys, you can cycle through the settings. H0.25, H0.35, H0.50, H0.75 refer to how accurate the thermostat is in ˚C Celsius. Pi15 and Pi30 are optional alternative settings, where the radiator waits 15 and 30 minutes respectively before checking if the room temperature has dropped from the set temperature and will act accordingly.
1. Has open window detection been triggered? If so, the heater will not heat. Look for an open window icon on the main display. To enable/disable: Press “config” button, hold down “config” for 5 seconds until the screen shows C1. Press + until the screen shows C5. Press MODE/OK. The open window icon should appear alongside ON or OFF. Adjust between ON and OFF using the + and - buttons. Press MODE/OK to confirm and exit the menu.
2. Is the thermostat accuracy too low or set to minutes instead of temperature drop? To check and adjust, press “config” button then hold down “config” for 5 seconds until the screen shows C1. Press + until screen shows C2. Press MODE/OK. Using the + and – keys, you can cycle through the settings. H0.25, H0.35, H0.50, H0.75 refer to how accurate the thermostat is in ˚C Celsius. Pi15 and Pi30 are optional alternative settings, where the radiator waits 15 and 30 minutes respectively before checking if the room temperature has dropped from the set temperature and will act accordingly.