Reasons Your Boiler System is Getting Overheated

Reasons Your Boiler System is Getting Overheated

Having an overheating boiler might be a serious concern as it takes place due to several reasons. This can range from limescale build-up and certain blockages to getting faulty within the entire unit. When your boiler begins to overheat, the heat rises to an insecure level which can lead to shut down the system. This safety method has been launched in the recent years and this is something all good boilers have been fitted with. Earlier, the overheating boilers were not fixed in time that could lead to risky consequences. Luckily, this is a rare occurrence now and an overheating boiler has to be attended for ensuring such situation does not happen. If you are worried whether the boiler is overheating, then consider some common reasons for this problem by consulting with the engineer and know what should be done so that the boiler works properly. 

How you can find an overheated boiler

The major symptom of an overheating boiler is shutdown. The modern boilers won’t work as soon as they become risky. This usually happens when the boiler has been overheated and the pressure inside the boiler has increased to dangerous level. In order to prevent pressure from rising ahead and the system getting exploded, your boiler will stop working efficiently.

Once the boiler stops working and gets overheated, you need to turn off the water immediately. This will prevent water from running inside the unit when any safety measures do not work. It can lessen the risk of pressure from being built up in the system. When water continues to run within the unit, it may turn into steam that can increase the pressure of your boiler thus, causing explosion. 

After the water has been turned off, you are advised to talk to an accredited engineer about what might lead to the problem before getting the unit back and make it run again. It might be quite risky to fix an overheated boiler and you need to possess necessary skills and expertise for solving the problem. Otherwise, it is best to leave the boiler into the hands of experts.

Causes of an overheating boiler

Let us consider some causes to find out the one that might affect your boiler system.

  • Build-up of limescale – All the appliances which require water may get affected with limescale and the same will be applicable for boilers too. The problem of a limescale might build up inside the boilers and when the limescale gets deposited on heat exchanged, it can cause trouble t the boiler. All boilers consist of a heat exchanger that can heat water with hot gas so that hot water might circulate properly around each radiator in the house. When there are lots of limescale on the heat exchanger, the water that flows through it might be blocked and the boiler will run the possibility of getting overheated.

Thankfully, this problem can be detected before the boiler gets overheated. When limescale has been built up, the boiler will create a whistling noise due to water getting restricted. If this takes place, then you will have to talk to an engineer and know how to fix limescale build-up before the boiler stops working fully. 

  • Failed thermistor – The boilers have a thermistor which is the kit responsible to measure water temperature. If this goes wrong, then the water temperature might increase to unsatisfactory levels which can make the entire unit to get overheated. 

You need to speak with your heating engineer when a failed thermistor is responsible for your overheating boiler. A qualified engineer can assess the thermistor and decide if or not it has to be replaced. Often, you need to replace thermistors for fixing your overheating boiler. 

  • System blockage – The old heating systems might suffer from some kind of blockages that can happen anywhere in your boiler. Regretfully, these blockages can lead to an overheating boiler and if it is creating lots of noise or some radiators are failing to heat up properly, then it is possible that there is some blockage in your system. So, you should take necessary steps to clear the blockages so that the boiler does not overheat and lead to serious problems. 
  • Damaged pump – If there are some faults inside the boiler, then this can be the reason for overheating. One drawback is the pump that circulates water around the heating system. If the pump does not work properly, then this can cause hot water to remain within your boiler. When this continues for a certain period, the boiler will possibly begin to overheat. 

The faulty or damaged pumps need to be fixed if a new boiler has to be installed. But the pumps will have to get replaced so that the boiler works efficiently. It is suggested that you talk to an engineer and know about the problem with your pump that has led to an overheated boiler. This way, you can find out what should be done to overcome the issue quickly. 

How you can stop a boiler from getting overheated

An overheating boiler seems to be frightening but there are several steps that can be taken to ensure this problem does not occur again. It is advisable that you get the boiler serviced on a daily basis so that you can avoid risky problems such as overheating. The engineers will give advice on any necessary repair works that should be done for your boiler before the problem makes the unit to become dangerous. You are also advised to replace old boiler systems with newer units as modern ones offer all the safety features to avoid the dangers associated with overheating. 

Thus, if your boiler is getting overheated, then you should turn off the water and call an engineer who offer boiler repair services in London without delay. Having an overheating boiler means the system will shut down but the situation might become dangerous when it does not. 


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