immersion heater ineffective - using economy 7 tariff?
Recently the water in the tank is only getting lukewarm. Electricity co have checked the meter, immersion heatre and thermostat have all been changed (3 new stats!)
I'd appreciate any ideas on what the fault might be. Not the element - its been changed also tested ok.
not the supply or timer - we've nbeen up thru the night to check it.
At wits end, really appreciate ideas.