I moved into a new property a few months ago with a direct heating hot water cylinder. This is a new one for me as I have always had a gas combi boiler before.
I have economy 7, so the water heats up during the night. The thermostat on the immersion heater is set to 60° c and and in the morning the gauge always reads 60° and 2 bar.
Usually when I get back for work the temperature has dropped to about 58°c which seems pretty good to me.
There is a recirculation pump which the previous owner had disabled, I decided to leave it disabled as it seems a waist of energy circulating hot water all the time when I am out.
However in the last week when I get home the the gauge has been reading 40°c and 1-1.5 bar. Along side this I am now getting hot water at the kitchen tap almost Instantly, where as I used to have to run it for a minute.
Is it possible that the recirculation circuit has just started working on convection only? Or could I have a leak?