hello, I am experiencing problem with my hot water. I have measured it at 75 degrees C and cannot get it to be any cooler. I have a normal gravity fed (s-plan) system with the hot water cylinder in the loft. To check the operation of the cylinder thermostat I turned on the hot water demand and then turned down the stat until it clicked (just above 50 degrees!). I pulled the stat (drayton HTS-3) off the cylinder. There looks to be a significant gap between the metal plate on the stat and the cylinder. It looks to me that the plastic case only of the stat is touching the cylinder. I suspect that this is wrong. Any ideas?
Regards
Regards