Hi I recently installed a TH16 to control a heater in a summercottage to keep it frostfree.
I've set it to power on at 4°C and off at 8°C but it never goes down to 4°C the lowest I have seen is 6°C before it starts heating.
Another issue is it powers on / off a number of times every day for 2 seconds only. no matter what the temeperature.
Firmware is up to date