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Are you experiencing issues when your electric tripping is happening in your home? Find out what might be the cause of your RCD to fail and learn the best way to fix it in this tutorial.


Introduction to RCD Problems

In our article on RCD trips, we’ll discuss possible reasons for frequent RCD trips and the steps to address the problem. We will also go over how to take an RCD from an appliance fuse box, how it can be replaced, and how to stop the RCD from tripping, and the consequences of not fixing an RCD with this issue.

This article can be useful in the event that you’re having issues in your RCD or simply need to stop RCD tripping from happening in the beginning.

What is an RCD?

In this section, we will look at the definition of what an RCD is. We will also consider the location it is located and the purpose for which it serves. The residual current device, also known as an RCD is a security device that is designed to shut off the power in the event of fault, and acts as an emergency shut-off switch. RCDs are more than the safety levels of regular circuit breakers and fuses.

An RCD is typically located inside the fuse box (consumer unit). It can also be found between the circuit breakers as well as power outlets. The goal for an RCD is to help minimise the danger of electrocution or fire. RCDs are life-saving.

If someone comes into contact with something that is alive then the RCD will shut off the circuit in just a small amount of time which decreases the risk to suffer serious harm or even death substantially.

Why Does my RCD keep tripping?

Let’s now consider possible causes to explain why your RCD is constantly tripping. We will look at typical causes like faulty appliances, an inaccurate RCD rating, and central heating issues.

Faulty Appliance

One of the main motives for RCD trips is a defective appliance. The RCD will go off to cut an electrical circuit that is dangerous resulting in an item that is defective.

This is obviously one of the main functions of an RCD. If the trips happen shortly after a modification or repair in the home, this could be a sign of the malfunction of an appliance. It’s more likely to happen when more appliances are connected than normal.

Also, look for appliances that are operating at will. It could be that your fridge or oven are activating the RCD.

Low-Quality RCD

In certain cases an unreliable RCD could be the reason why it is constantly tripping. In this instance, the RCD might be tripping even though it’s not supposed to. If you have a poor quality RCD it may not reset or it will not reset properly, and then tripping a few minutes afterward.

Wrong RCD Current Rating

Each RCD is equipped with a specific rating that if it is met or exceeded, can result in it tripping. In the event that you find that an RCD has a rating that is too low, this can cause it to trip without reason and often. An indication of an RCD that has a wrong rating is if it trips repeatedly.

Motors or Pump In An Appliance

If a pump or motor in the appliance creates brief spikes of electrical energy, the spike could be enough to trigger an RCD. Appliances that have motors include fans, hair dryers, electric razors, while washing machines are also among the items equipped with pumps.

If your RCD only trips at certain times, it could indicate that a particular appliance includes a pump or motor can be the cause of it tripping.

Older Washing Machines/Dryers

Electrical spikes may also be caused by old dryers or washing machines that can trigger an RCD. Similar to appliances that have pumps or motors when it appears that your RCD timings are the same during the same time during the same time of day (when you’re using these appliances) it is a sign that your washing machine is triggering an RCD as well as the dryer.

Fridge/Freezers Cooling Down

A freezer or fridge cooling down could cause electrical surges. Because these appliances are usually at a constant plug, a running RCD at any time during the day may be an indication that the issue is causing it.

In the event that you find immediately after the motor in your refrigerator or freezer starts to work at a higher rate, the RCD runs, this could be a sign that a freezer or fridge cooling is the reason.

Moisture in Outside Electrical Boxes/Sockets

If there is moisture present inside electrical boxes that are outside or sockets, it could trigger an RCD to trip. The first sign that this might be the cause is when the weather seals have lost their effectiveness or your RCD is constantly triggering.

Central Heating Issues

A malfunctioning part of the central heating system may be the reason for or causing an RCD trip. When a timer switches on the part that is defective, it can cause one or more RCD trips. It could or might not result in RCD trips at specific times during the day. It can also lead to RCD trips continuously all day long.

Water in Wiring

It’s not unusual for wiring that is saturated with water to trigger RCD trips. The moisture can get into electrical wiring after a shower or bath, or possibly due to rain getting into wiring.

The signs that water in the wiring is the culprit could be the possibility of an association between recent water use of some sort or rainfall or RCD trips.

How to Fix a Tripping RCD

For every cause that causes an RCD trip there are different solutions that you can consider. This section will break down the ways to solve the tripping RCD for every one of the issues mentioned in the preceding section.

How to Fix a Faulty Appliance

To determine if an appliance that is not working properly causes your RCD to go off, disconnect each electrical appliance you have within your home. Then, check whether your RCD resets properly. In the event that it is, then plug in each appliance in turn and then reset your RCD after the plug is connected to each piece of equipment.

If you notice that the RCD begins to trip again after plugging in a device specifically the past, you’ve probably discovered the root of the issue. To fix this issue, you must seek out a professional for help to fix or replace the device.

How to Fix a Low-Quality RCD

In order to fix a bad RCD You should seek the help of an expert. Most likely you’ll need the installation of a new RCD to be installed. To avoid costly costs it is recommended to discuss this with your electrician prior to their arrival to check the RCD.

How to Fix a Wrong RCD Current Rating

If your RCD is not rated correctly the RCD may be replaced. Discuss with a professional the issue. It is likely that you will require them to come out to come to your home to inspect and fix and replace your RCD.

How to Fix Any Appliances/Items That Use Motors or Pumps

If you have appliances that use pumps or motors typically, you’ll need to engage an electrician to help you fix the issue. They might suggest a repair or replacement. You can discuss this with them prior to their first visit.

How to Fix Older Washing Machines/Dryers

An electrician can examine your dryer or washing machine in the event that you suspect one of them is the culprit. If you believe that your suspicions are right They may recommend having one or more of the parts repaired, or having the whole appliance replaced depending on the extent of the problem.

How to Fix Fridge/Freezers Which Is Cooling Down

If you think that the motor functioning to cool down a refrigerator or freezer could be the reason then it’s best to get a professional inspect the motor.

They could suggest replacing the appliance or rerouting wiring to the freezer or fridge to stop RCD trips. If the refrigerator or freezer is covered under warranty, you may receive a new one at no cost.

How to Fix Moisture in Outside Electrical Boxes/Sockets

To address issues caused by the presence of moisture in electrical sockets or electrical boxes it is recommended to shut off power completely prior to drying the electrical sockets or boxes. When the seals for weather are damaged beyond repair, it is recommended to be replacing them.

How to Fix Central Heating Issues

If your central heating system is experiencing issues and fails to reveal what the RCD troubleshooting causes are, it is recommended that you get a professional to visit to look at the issue and prior to that, discuss potential repair and replacement options. An electrician who inspects the central heating system could discover the issue and provide solutions such as repair or replacement for the component.

How to Fix Water in Wiring

The addition of more ventilation or heating to your home will help stop moisture from damaging the wiring in your home. Combining a heater with an instrument like a Hygrostat (humidistat) and hygrotherm,, you can regulate airflow and humidity more effectively within your home.Hygrostats are able to detect humidity levels within an enclosed area. 

They are connected to the heater, which helps in managing the humidity. Hygrotherms function as a temperature and humidity control.

If the issue persists it is possible to employ an electrician, and it is recommended to consult an expert regardless of the situation since you may want to make sure there aren’t any immediate safety issues.

How do you remove an RCD from your Fuse Box

In this article, we’ll describe how to take the RCD in the RCD fuse box. In certain cases the RCD could be located somewhere else, however in most instances, it is located within the box that houses it. Lift the flap of the fuse box. The RCD switch could be identified as “RCD”.

Alternatively, it could have an ‘T’, or”Test” right over it. Before you remove the RCD make sure that the power is completely off. Use a screwdriver to take out both screws that attach it to fuse boxes.

Find an unassuming tab that has an opening on the rear of the RCD. A screwdriver that has a flat blade could be used to insert into the slot. After that, pull down the slot and pull the RCD in the direction you want to get it out.

This can be accomplished DIY in the event that the above guidance is relevant, however certain RCDs and fuse boxes can differ. Although hiring an electrician might not be required, if you’re in doubt it is recommended to consult an expert.

How to Replace an RCD

In this article, we will look at how to repair an RCD and also look at issues such as whether this could be done yourself, and what costs involved in the event that you had to employ an electrician. As mentioned above in the previous paragraph, an RCD can be labelled as it’s referred to or identified with an ‘T’ or word “Test” above it.

In order to replace an RCD it is first necessary to be required to remove it by following the steps described in the earlier section. After the RCD is gone, a new one can be installed after completing the removal process in reverse.

However it is important to note that a new RCD will also have to go through a variety of tests. When replacing an RCD is a DIY project If you’re proficient and well-studied in this field hiring an electrician.

There many aspects involved in correctly the replacement process for an RCD. It could take somewhere between £30 to £70 for replacing an RCD. This includes the cost of installation as well as supply. The replacement of an RCD in itself is likely to run approximately £10 to £40.

How to Prevent an RCD from Tripping?

In this section, we will examine ways to avoid repeat RCD trips. We will examine steps that can be taken to prevent it from happening repeatedly. To prevent RCD trips, ensure you have a high-quality RCD in the first place.

If not, look into changing it to a more efficient RCD. Making sure your appliances are in good condition can prevent a damaged appliance that causes RCD malfunctions. Also, make sure whether your RCD is running at the right rating.

Installing devices to regulate the humidity level and using a good ventilation system and fan at home, you’ll minimise the possibility of water getting into wiring. Also, make sure there is no moisture in the outside of electrical sockets and electrical boxes.

Switch off the power before checking them, and then dry them if required. Also, ensure that the outdoor seals for the weather are in great condition however, you may need to replace them if need be. These methods can be employed to stop repetition of RCD trips in the event that it happened prior to.

Regular cleaning of the boiler performed by a specialist is an effective step you can take to stop this issue from recurring. Another good idea is to take care of any issues with appliances or electrical appliances promptly when they begin to occur.

What Can Happen If I Don’t Fix my RCD?

Inability to repair the issue with an RCD that is constantly tripping could cause a number of risks like the possibility of electrocution and fire. A RCD that is constantly going through the motions could be defective or of poor quality at the beginning However, a steady trips can result in the RCD to degrade over time.


A RCD is a security feature and if it’s not functioning properly, fire is among the risks associated with it. If it keeps going through a tripping cycle, its capacity to function could end up being damaged.

RCDs are made to stop working whenever there is an abrupt increase in electrical activity, so an RCD that is damaged or defective could increase the likelihood of a fire starting within a home.

Electric Issues

If an RCD cannot turn off and stop the power when it should, like a result of repeated tripping, resulting in damage electrical issues could develop over time and cause risk by increasing the possibility of electrocution or fire.

It could increase the chance of wear and wear, and harm to the electrical system in general.


Like electrocution, fire is a hazard that you are at risk in the event that an RCD isn’t functioning properly or is continuing to trip.


If your RCD is frequently tripping and you aren’t aware that you realise that the RCD is going off due to a real safety issue to your home’s electrical system or appliances.

This could increase the chance of negligence and make it more likely that indications of a defective appliance or a problem in your electrics to be overlooked.

Electrician Cost

The next step is to breakdown the estimated cost that an electrician will incur, including RCD installation fees. The cost of electricians can vary greatly across different regions in the UK.

Electrician Charge (Hourly)£30-£50/hour
Electrician Charge (Daily)£240 to £400 per day
Emergency Electrician Charge (Hourly)Between £70 and £90 per hour
Fix or Replace an RCD£30 to £70


Q: How does an RCD work?

A: An RCD works by measuring your home’s electric current flow and on noticing a fault or surge in electrical activity it will shut off the power.

Q: Where can I buy an RCD?

A: You can buy an RCD through a retailer like Screwfix or TLC. You will also find RCDs for sale on online stores such as eBay.

Q: How long does an RCD last?

A: An RCD will probably have 10 years or more before becoming faulty.

Q: Is an RCD mandatory?

A: You may be required under Part P of building regulations to have an RCD installed although this should only apply to new or rewired homes. There are many cases for new or rewired homes where you will need an RCD.

Q: Do I need a new RCD?

A: Generally, if your RCD is damaged or faulty, it will need to be replaced.



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