This is connected to a valiant eco pro boiler. Batteries in the thermostat leaked onto the PCB in the thermostat and now not behaving. Can't find a replacement 360f anywhere but not sure I would want to as it is a complex thermostat and because of this I never used it properly. Can I use other wireless thermostats other than variants in combination with a valiant boiler? Is it an easy job to install these or would I need an engineer? Thanks for your time.