I am having the same problems, hot water okay, but no display visible on the thermostat (have changed batteries) and also tried some gentle persuasion! I have seen just the thermostat for sale on ebay (and also the sets), so I am wondering do you really have to get both?

Carole, February 2015

You can just buy the display unit. but u will need to download the instructions or hope to get some with the unit as they have to be programmed to work together. this is the case even if you brought a set or seperate

ha23, February 2015