Does the shower not heat water in warm, hot, summer or winter? Shower resistance always burning? Shower cable melting? These are the main problems that occur with the shower, here you will learn how to solve all of them, in addition to learning about the types of resistors, their main powers and tips that make all the difference in the installation of the shower resistance.
It is of great importance that you know that the electric shower is dangerous because it has high power and works in contact with water, so the circuit breaker or main switch must be turned off for any maintenance on the equipment! Electricity security is very important and should always be your first concern.
When the shower is not heating the water in warm, hot, summer or winter, the resistance of the shower may be oxidized (with zinabre), broken or burnt to one of the temperatures. In the case of firing, the only option for maintenance is to change the resistance.
How to change the shower resistance?
We will teach the exchange of two types of resistance, one resembles spring and the other has the turns fixed to a plastic body. Remembering that each shower brand (Fame, Lorenzetti, Hydra Corona, Sintex, Kdt, etc.) has a slightly different way of changing resistance, but the idea is basically the same.
To start, you need to know the power of the resistance. The most common are 2500W, 4400W, 5500W, 7500W, 6800W and so on. The more Watts, the higher the consumption and the temperature. The current will also depend on the voltage. It is also necessary to know what voltage the shower runs at 127V or 220V, and whether the resistance is shielded or not.
All showers have a cover for the water outlet and a second cover for the water retention next to the resistance and both covers must be removed to change the resistance.
The first resistance is the most common, has three terminals, and looks like a spring, a smaller part responsible for the warm or summer temperature and the other larger part responsible for the hot or winter temperature. For the spring resistor, in the shower, there is the identification of the letters A, B and C that correspond to the correct terminals of the resistor. .
Before installing the resistance, sand the shower terminals, to remove the zinaber that is accumulated in the shower body terminal. When placing the resistor, the important tip is that the spring resistor must have its turns well separated when its exchange is finished, since any contact between the turns can burn the resistance again.
The second resistance is attached to a plastic body, which facilitates its exchange and reduces the possibility of burning. It is fitted in a position, that is, preventing the shower from malfunctioning and undue burning after replacement.
To fix the water outlet cover, the two raised arrows must be observed, one on the shower body and the other on the cover. To start turning the cover for tightening, the arrows must be together so that the cover is in the correct position. Remembering that after changing the resistance, turn on the shower to leave water, without turning on the power and only then turn on the power to see if the shower is heating up again.
Melted shower cable: What’s the matter?
Another very common problem in the shower is the melted cables, which can bring great risks. In this case it is important that a qualified professional does this type of service, the electrician.
This type of problem can occur due to bad splicing or connection, not using connections suitable for the current that the shower needs. Another problem that can cause the cables to melt is that the cable section is badly dimensioned.
The best options for the connection between the shower and the cables is a porcelain (ceramic) connector or connectors suitable for this type of connection. On the other hand, for badly dimensioned cables, it is ideal to redo the cable dimensioning through calculations, remembering that the cable section varies according to the power of the shower and the distance from the switchboard to the shower.
Here on the World of Electrical website you can find an article that explains in detail how to design electrical cables . If you have any questions, leave them in the comments and we will be happy to answer them!