The first is that there was a dodgy relay in the HC60NG. Honeywell supplied a replacement that simply substituted for the existing removable unit. That changed the behaviour of the system noticeably, such that the interval between the boiler firings became highly variable (between 10 minutes and an hour). The boiler is now no longer firing continuously, or in fact at all for the heating system. It's just running the hot water now. So the result we wanted. With a sleek design and intuitive interface, this series lets you easily program your desired temperature settings and schedule throughout the day. It offers precise temperature control, ensuring a comfortable environment while helping to reduce energy consumption.

After replacing the cover, the sensor will automatically reconnect with the thermostat within a few seconds.To access the battery compartment, gently pull the cover plate away from the bottom, wiggling it if necessary, until it detaches from the base plate.

Hi all, I've looked at all the other HCW80 / HC60NG problems - mines a bit different, I hope you can help... If i turn the thermostat up to 30 the heating stays on - i haven't waited till the room gets that hot. If i turn the thermostat down to 10 the heating stays off - it only does the 10min cycle when the room is at the set temperature ie room at 20, thermostat at 20. Without understanding the exact heating system and wiring configuration it’s hard to provide a definitive recommendation. The “T6 Pro Smart Thermostat” could work as it supports multi-stage heating and cooling and can be integrated with a heat pump system. However, professional installation is recommended. A built-in compressor protection feature sets this series apart from others. This feature protects the compressors in your air conditioner and heat pump. Moreover, it hosts a control system and a display screen. It's important to note that not all Honeywell thermostats require batteries – but if yours has an LED display, it most likely does.And that's it – you're now equipped to replace batteries in various Honeywell thermostat models, from the classic 1000 and 2000 series to the advanced T10 Pro. Sources