Dripping geyser overflow
Geysers often leak (drip) through the pressure expansion valve that is general found on the pressure regulating. This is normal as the water in the geyser expands and contracts i.e. heats and cools and usually happens if and when water has been drawn from the geyser. Anything more than a few litres a day usually indicates that the expansion valve is faulty. This valve should be replaced if there is a constant steady drip from the overflow pipe.
Overheating: Steam or hot water escaping from the overflow
As with an electrical thermostatic kettle a geyser thermostats are specially made to switch the geyser “on” an “off”. If the thermostat fails and does not switch “on” the water in the geyser obviously ceases to heat. Alternately if the thermostat fails and does not switch “off”, the water in the will continue to boil in which case the geyser may explode (see Pictures of Exploded Geysers”.
An indication that the thermostat is failed in an “on” position is when you notice that the hot water temperature has increased considerably and or hot water and steam is seen coming out of the overflow pipe. This escaping hot water and steam is a safety discharge through the temperature and pressure valve (TP valve) by releasing hot water because excessive temperature and pressure building up in the geyser. This is potentially very dangerous situation and must be take care of immediately. Switch off the electrical supply to the geyser and call 0860Plumber.
Water leaking through the ceiling
This clearly indicates that you have a leak in the roof which in most cases is the geyser and if a drip tray is not installed. Close off the cold water supply to the geyser and switch off the power to the geyser at the distribution board. Do not stress your geyser is not going to explode the damage has been done. If the leak is not too serve you can still continue to use the geyser until a replace has been done.
Water not hot enough
There are generally numerous reason for not having enough hot water. The most common is that the setting on the thermostat is too low. A thermostat has a setting on the thermostat itself that one can adjust, but bear in mind the higher the temperature the higher the electrical cost. The recommended setting from most geyser manufactures is that the temperature is set to 60 deg C. Another problem that may cause not having enough hot water or in most cases no hot water is a faulty thermostat and or element. Leaking hot water pipes while less likely problem, can also cause not having enough hot water. Over use of the hot water especially in the winter season also results in not having enough hot water. This is capacity problem and generally can only be solved by increasing the capacity of the geyser.
Not enough hot water in older geyser installation maybe the result of calcification and or sediment build up in the geyser.
No hot water
Start off by check whether the geyser circuit breaker on the main distribution board has tripped. Continue tripping of the geyser circuit breaker may indicate a problem with the thermostat and or the element. If the circuit has not tripped and you still do not have hot water then the most likely case is that the thermostat and or element has failed. The thermostat and the heating element should always be replaced together.
Poor hot water pressure
A number of things can cause low hot water pressure. These include old, blocked galvanised pipes, municipal supply to the area, leaking pipes underground or dirt in the valves. Most modern house operate on high pressure systems ranging between 400 and 600kPa however some older houses still have old low pressure geysers – only 100 kPa. In most cases the pressure regulating valve has just failed and needs replacing.