TRVs set for individual rooms. Complete System: One Wireless Temperature Sensor, One Wireless Receiver, 9 TRVs
Thanks for the comments and the various suggestions. I will work them through. Heating is, of course, turned off for summer. I identified the problem when I turned on one heater when all the rest were in frost protection mode. It might be easier for me to understand what is happening when the heating is in normal winter mode. I should be able to work something out.