Our company Plumbers Walthamstow, gives common heater problems and lists their checks and remedies below:If there is no hot water.Check for: Check if the safety thermostat has stopped working.Check for defective heating thermostat.Check for accumulation of scale, rust, or sediment in the pipes.Check for the water heater’s power.Check for defective heating elements.Remedies:If the heater repeatedly blows fuses, call an electrician.Press the reset button.Test the thermostats level of the heater.Test the thermostats.Test the elements of the heater and replace if necessary.Drain and flush pipes.Check the circuit breaker.If water supply is low.Check for:Thermostat’s settingThe size of the tankDefective heating elementLeaking water faucets.Remedies:Turn on the thermostat to a higher temperature.Install a large size heater.Insulate the water pipes.Test the element, if necessary then replace it.Repair or replace the taps.If water temperature is too high.Check for:Thermostat’s setting.Check for insulation around the thermostats.Remedies:Turn up the thermostat.Add cushion around the thermostats.Test the thermostat level and replace it if it becomes necessary.If water is leaking in the heaterCheck for:Inoperative gasket Inoperative safety valveLeaking connections of pipeRemedies:Check and change gasket or seal.Check and change the safety valve.Buy a new heater.Seek help from a qualified contractor.If water heater becomes noisyCheck for:Accumulation of scale, sediment, or rust in the tank.Remedies:Drain the water tank and flush it Remove the elements in the heater.If heater pipes become discolored or rustyCheck for:Accumulation of sediments in the tank.Remedies:Drain the heater tankSeek help from a qualified contractorYou can Seek help from Plumber Walthamstow.