by plumbbob »
Wed Aug 21, 2013 4:05 pm
Do you heat the hot water using an immersion heater on an economy seven tariff? Is your hot water from the tap extremely hot in the morning?
If so, get the immersion thermostat checked out. It may not be cutting off at the correct temperature and the water is boiling.
Incidentally, check how hot the water is in the tank in the loft. It should be cold or at most room temperature.