No Hot Water

Troubleshoot and fix common problems causing no hot water from your taps and shower. Let’s fix your hot water issues.

No Hot Water – How to fix?

Hot water is an essential part of any home or property in the UK. From taking a bath to washing up dishes, we rely on hot water throughout our daily lives, and it can be extremely frustrating when there is no hot water in the house.

If your hot water is not working, don’t worry – we are here to help! Below you will find more information on troubleshooting and fixing common hot water issues.

Fix no hot water in house

 

First things to check

Below are a few general checks that can help identify common problems that cause no hot water from taps and showers. It may be possible to fix some of these issues yourself, whilst others are better left to an expert.

Read on to begin troubleshooting common causes of no hot water in homes.

Gas, Electricity & Water Supplies

Your boiler will need both a water supply and fuel supply (typically gas or electricity) to work properly. It can sometimes be easy to accidentally turn off these, and if your boiler has neither a water supply or fuel, you won’t receive any hot water.

A quick check can solve the issue and save having to call out a boiler engineer.

Thermostat Settings

Just like checking the water and gas/electricity supplies to your boiler, it is also a good idea to quickly check your thermostat to ensure your hot water and heating are turned on. Thermostats vary greatly between units and homes, and not all will have a function to turn off the hot water supply. 

It only takes a moment to double check that your thermostat has power (if it is battery operated), the hot water is turned on and that it is not set to the coldest setting. Try temporarily turning up the dial to see if that kick starts your boiler back into action and fixes the problem.

Reset the Boiler

Many boilers have a boiler reset button, switch or dial that can be found on the front of the unit. First, switch your heating and hot water off using your thermostat or central control, and then hold down the reset function on your boiler until it resets. Remember to turn on the heating and hot water again on your thermostat control.

If your boiler doesn’t have a reset button, or if using the reset function doesn’t fix the hot water problem, you can also try turning the unit off and on again.

Below are guides to resetting different boiler brands:

Frozen Pipes

During prolonged cold weather, pipes can freeze and prevent your boiler from working. The most common pipe to freeze is the condensate pipe, which takes waste condensation away from your boiler to a drain that is normally located outside.

You can try to unfreeze the pipe using hot (but not boiling) water. As there is no hot water from your boiler, use a kettle or your hob to heat water for the defrosting. You may need several attempts to clear the frozen pipe. However, if that still does not work you may need to call in a boiler technician.  

Boiler Clock/Timer

Even quite modern boilers won’t always update their clocks when changing between GMT and BST. If you set a timer to activate your heating and hot water throughout the day, the clocks being set incorrectly could be the cause of no hot water in your home.

This is one of the quickest troubleshooting tests to perform, and normally occurs when the clocks go either back or forward.

Has there been a recent blackout?

A power outage can sometimes through your boilers settings off. If there has been a recent power cut, it is a good idea to double check the settings on your boiler to ensure that it is set up correctly. As with the point above, check that your clock is correctly reset and that the hot water is set to on.

Diverter Valve Problems

If your radiators are hot but you have no hot water, it is most likely a problem with your diverter valve. The valve allows combi boilers to switch between heating your home and powering your hot water supply. When you turn on a hot water tap, the valve diverts heating away from the radiators and supplies hot water to the tap.

In short, if the diverter valve is not functioning correctly, your combi boiler will still have heating but no hot water. The valve may be faulty or stuck in the central heating position. A boiler engineer can diagnose and fix the fault, either repairing the valve or replacing it.

Low Pressure

Having sufficient pressure is an essential ingredient for system and combi boilers to function correctly. If your hot water pressure seems low, you can check the pressure using the dial on the front of your boiler. The pressure should typically be around 1-bar, and there may be an indicator to your boilers normal pressure range.

Low pressure can be caused by a number of problems, such as leaks in the system. Over time, combi boilers can lose pressure gradually. Your boiler manual will normally provide instructions about how to top up the boiler pressure. If you need to remove the boiler panel, it is recommended to use a qualified technician.

Airlocks

Air can sometimes build up in pipes, causing the hot water taps to splutter or produce no water at all. As air is less dense than water, airlocks occur in the high points of pipes, and can result in either a partial or complete blockage.

To fix the blockage, you can connect your blocked hot water pipe to a working cold water pipe. The pressure from the cold water tap will hopefully push out the airlock and resolve the issue (make sure the blocked hot water is open before turning on the cold water tap). If this does not work, you may need to drain the whole system, which can be done by a heating technician.

Ball Valve Float Problems

If you have an open vent boiler (a boiler with a water tank) the ball valve may be stuck, reducing or stopping hot water flowing around your property.

As the float is used to control water levels in the hot water tank, a low water level is generally an indication that there is a problem with the ball valve float. Fixing the stuck ball float may be as simple as moving the valve arm, but it is important to be gentle and check for anything that it may be caught on.

Fix no hot water in house

 

First things to check

Below are a few general checks that can help identify common problems that cause no hot water from taps and showers. It may be possible to fix some of these issues yourself, whilst others are better left to an expert.

Read on to begin troubleshooting common causes of no hot water in homes.

Gas, Electricity & Water Supplies

Your boiler will need both a water supply and fuel supply (typically gas or electricity) to work properly. It can sometimes be easy to accidentally turn off these, and if your boiler has neither a water supply or fuel, you won’t receive any hot water.

A quick check can solve the issue and save having to call out a boiler engineer.

Thermostat Settings

Just like checking the water and gas/electricity supplies to your boiler, it is also a good idea to quickly check your thermostat to ensure your hot water and heating are turned on. Thermostats vary greatly between units and homes, and not all will have a function to turn off the hot water supply. 

It only takes a moment to double check that your thermostat has power (if it is battery operated), the hot water is turned on and that it is not set to the coldest setting. Try temporarily turning up the dial to see if that kick starts your boiler back into action and fixes the problem.

Reset the Boiler

Many boilers have a boiler reset button, switch or dial that can be found on the front of the unit. First, switch your heating and hot water off using your thermostat or central control, and then hold down the reset function on your boiler until it resets. Remember to turn on the heating and hot water again on your thermostat control.

If your boiler doesn’t have a reset button, or if using the reset function doesn’t fix the hot water problem, you can also try turning the unit off and on again.

Below are guides to resetting different boiler brands:

Frozen Pipes

During prolonged cold weather, pipes can freeze and prevent your boiler from working. The most common pipe to freeze is the condensate pipe, which takes waste condensation away from your boiler to a drain that is normally located outside.

You can try to unfreeze the pipe using hot (but not boiling) water. As there is no hot water from your boiler, use a kettle or your hob to heat water for the defrosting. You may need several attempts to clear the frozen pipe. However, if that still does not work you may need to call in a boiler technician.  

Boiler Clock/Timer

Even quite modern boilers won’t always update their clocks when changing between GMT and BST. If you set a timer to activate your heating and hot water throughout the day, the clocks being set incorrectly could be the cause of no hot water in your home.

This is one of the quickest troubleshooting tests to perform, and normally occurs when the clocks go either back or forward.

Has there been a recent blackout?

A power outage can sometimes through your boilers settings off. If there has been a recent power cut, it is a good idea to double check the settings on your boiler to ensure that it is set up correctly. As with the point above, check that your clock is correctly reset and that the hot water is set to on.

Diverter Valve Problems

If your radiators are hot but you have no hot water, it is most likely a problem with your diverter valve. The valve allows combi boilers to switch between heating your home and powering your hot water supply. When you turn on a hot water tap, the valve diverts heating away from the radiators and supplies hot water to the tap.

In short, if the diverter valve is not functioning correctly, your combi boiler will still have heating but no hot water. The valve may be faulty or stuck in the central heating position. A boiler engineer can diagnose and fix the fault, either repairing the valve or replacing it.

Low Pressure

Having sufficient pressure is an essential ingredient for system and combi boilers to function correctly. If your hot water pressure seems low, you can check the pressure using the dial on the front of your boiler. The pressure should typically be around 1-bar, and there may be an indicator to your boilers normal pressure range.

Low pressure can be caused by a number of problems, such as leaks in the system. Over time, combi boilers can lose pressure gradually. Your boiler manual will normally provide instructions about how to top up the boiler pressure. If you need to remove the boiler panel, it is recommended to use a qualified technician.

Airlocks

Air can sometimes build up in pipes, causing the hot water taps to splutter or produce no water at all. As air is less dense than water, airlocks occur in the high points of pipes, and can result in either a partial or complete blockage.

To fix the blockage, you can connect your blocked hot water pipe to a working cold water pipe. The pressure from the cold water tap will hopefully push out the airlock and resolve the issue (make sure the blocked hot water is open before turning on the cold water tap). If this does not work, you may need to drain the whole system, which can be done by a heating technician.

Ball Valve Float Problems

If you have an open vent boiler (a boiler with a water tank) the ball valve may be stuck, reducing or stopping hot water flowing around your property.

As the float is used to control water levels in the hot water tank, a low water level is generally an indication that there is a problem with the ball valve float. Fixing the stuck ball float may be as simple as moving the valve arm, but it is important to be gentle and check for anything that it may be caught on.

Quick Price Checker

Do you need a boiler technician or heating engineer to fix your hot water? No matter the issue, our professional technicians will get your hot water working again in no time.

Find out how much repairs cost in your area:

One-off Boiler Service

A one off boiler service is conducted at an interval decided by the homeowner, rather than at a scheduled time each year. There are a number of reasons you may decide to choose one off boiler servicing, whether it be to help costs low or perhaps you would like your boiler serviced at more frequent intervals.

We recommend servicing gas boilers at least once per year to ensure they are safe and working correctly.

Find out how much a one-off boiler service costs in your area.

Annual Boiler Service

There are an increasing number of homeowners opting for an annual boiler service schedule. Just like a car MOT, having an annual boiler check up will help it work at it’s best and most importantly, ensure that it is safe to use.

As well as keeping your boiler in great shape, choosing an annual boiler service is often cheaper than one off services. Many boiler and heating companies reward customers who schedule yearly boiler maintenance.

If you are looking for affordable annual boiler servicing professionals near you, request a quote today!

Find a local boiler engineer

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Gas Boiler Service

Servicing a boiler should always be done by a professional, but with a gas boiler service it is essential you always choose a Gas Safe registered engineer. All of our boiler professionals are registered and approved, so you are in good hands.

A gas boiler service also differs from other types of boilers due to the possibility of carbon monoxide leaks. This invisible gas has no smell, and can be fatal. Servicing for gas boilers should be carried out on a regular basis, and we recommend keeping to an annual schedule.

Gas Safe Registered Engineers

As gas can be extremely dangerous, it is essential that you always use a Gas Safe registered boiler engineer. All of our boiler engineers are Gas Safe registered, which is a mark of their competence and training to professionally carry out gas boiler servicing.

No matter which company you choose to service your boiler, make sure your engineer is Gas Safe registered.

Gas Boiler Service Cost and Repairs

Electric Boiler Servicing

Many people believe that electric boilers require less frequent servicing. Unlike a gas, an electric boiler won’t emit dangerous carbon monoxide gases if it malfunctions. As such, there are fewer safety risks by not regularly servicing an electric boiler.

However, there are a number of benefits of servicing an electric boiler. A regular service will help the unit run efficiently, which can save you money on your annual power bill.

During the service inspection, any faults will be identified and fixed before they become potentially expensive problems that will leave you without hot water and heating whilst waiting for a technician to carry out the repair.

Boiler Check – What is done during a service?

Even if you regularly have your boiler serviced, you may not fully understand what checks and work is carried out. Generally, the following inspections, cleaning and tests will be carried out during an annual boiler check.

  • Check the integrity and condition of all seals and gaskets.
  • Inspection of the chimney structure.
  • Inspection of burner, combustion chamber, injectors & heat exchanger.
  • Inspection of ignition devices (such as pilot lights, spark and electrodes).
  • Inspect and clean condensate traps and drains.
  • Test operating pressures, effectiveness of the flue & safety devices.
  • Test hot water & heating, making any adjustments that may be required.
  • Cleaning of parts, if required.

As part of the boiler service check, faults may be discovered and need repair. This can increase the cost of boiler maintenance, but finding and fixing issues can prevent your boiler from being damaged and will improve efficiency, which will reduce save you money over time.

Boiler Engineers Near Me

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Brand Servicing

Below we have some more information about servicing the UK’s leading boiler brands. Some of these manufacturers even provide boiler servicing and repairs, however prices can be higher than using a local independent boiler engineer.

Worcester Bosch Boiler Service

Worcester Bosch offer support and maintenance plans. These service plans provide extensive inclusions, such as regular maintenance and servicing. And if the boiler technician finds a fault and your boiler needs to be repaired, the costs are covered up to the value of £1,500.

Whilst a Worcester Bosch Boiler service plan provides complete piece of mind, the prices are much higher when compared to other providers. They are also mostly beneficial for boilers that are outside of warranty.

They often use a network of local boiler technicians, rather than their own engineers. As such, you will often be able to find the same high level of service at a cheaper price by going direct to the local technician.

Ideal Boiler Service

Similar to Worcester Bosch, Ideal Boiler servicing is available through a network of local technicians throughout the UK. These technicians meet the Ideal boiler maintenance standards and are competent with Ideal units.

In many cases, it will be cheaper to book a local boiler engineer directly, and you are likely to receive the same or even better level of service. If you need a local boiler technician, request a quote today!

Vaillant Boiler Service

Vaillant boilers are popular throughout the UK, but who should you choose to service your boiler. Vaillant has a number of their own technicians who are trained to know all the ins and outs of a Vaillant boiler.

On of the main drawbacks of a Vaillant boiler technicians is the limited availability throughout the UK. The price of a Vaillant boiler service is £85, which is around the average cost of larger firms, but it is more expensive than many local independent engineers.

Baxi Boiler Service

Just like the other major boiler manufacturers, Baxi boiler servicing can be organised directly on the Baxi website or by calling their customer service. A Baxi boiler service includes a thorough safety check, inspection of all components, checks for leaks and more.

We always recommend checking prices against at least 3 other local suppliers. We can help – quickly check the prices of local boiler engineers.

Glow Worm Boiler Service

Glow Worm provide some of the cheapest boilers available in the UK. Glow Worm are part of the Vaillant Group, and they use the same boiler servicing technicians. The price of servicing a Glow Worm boiler is also the same at £85.

As with Vaillant boiler servicing, you will most likely be able to find a cheaper deal with a local boiler engineer. However, The in-house team of boiler engineers at Glow Worm do have an exceptional knowledge of their machines.

British Gas Boiler Servicing

British Gas are one of the UK’s leading boiler service providers. They have a national network made up of thousands of boiler specialists who can assist with everything from installations to annual maintenance.

The cost of a British Gas boiler service starts from £79.30, which is an introductory rate available for the first year. British Gas boiler servicing is available as an annual service, which you pay for like a subscription, rather than offering one-off boiler services.

Homeserve Boiler Servicing

Homeserve has earned a reputation as one of the UK’s leading boiler maintenance and repair companies. They have extensive coverage around the nation, and pricing is relatively straightforward.

A typical Homeserve boiler service costs from £84, and is carried out by a Gas Safe registered engineer. For cheaper boiler servicing prices, we recommend checking the prices of local and independent technicians. Why not request a quote now?

Boiler Servicing FAQ

Below are some of the most commonly asked questions we receive regarding boiler servicing and maintenance. If you can’t find answers to your questions, please have a look around on our other pages or get in touch.

Why should I service my boiler?

There are many benefits to service a boiler annually, with safety and efficiency the two most popular.

Carbon monoxide can be fatal. It has no smell and can’t be seen. A faulty gas boiler can emit dangerous carbon monoxide, putting your home at risk. As part of an annual boiler service, the technician will check for leaks, ensure everything is clean and properly functioning, and inspect seals and gaskets.

Over time, boilers can become less efficient. Dirt and grime can build up within your boiler, reducing the performance and costing you more. With an annual boiler, the technician will thoroughly inspect your unit and clean away any dirt. The result of a more eco-friendly boiler that uses less energy to heat your home and hot water, saving you money.

If you are interested in a professional boiler service, we can help! Check prices and find an approved boiler technician in your area.

Fixing Common Boiler Issues

Below are a few of the most common problems homeowners face with their boilers, and how we can help fix them. Regular servicing and maintenance can help to prevent and fix the problem early, ensuring you are not left in the cold.

My heating or hot water isn’t working

Our trained boiler technicians will help get your heating back and your hot water flowing again. They will identify the issue, and fix your boiler, controls or central heating.

My pilot light has gone out

Relighting a pilot light can be complicated, and it differs between manufacturers and units. Our engineers are trained to work with all boiler brands, so will ensure your heating and hot water is back on in no time.

My thermostat isn’t working

If your thermostat isn’t working, our local boiler engineers can help. Whether your thermostat needs a quick reset or a complete replacement, our professionals will be able to provide the right advice to ensure your boiler is working all year round.

My boiler keeps switching off

There are a number of reasons your boiler may be switching off, including a safety device detecting a fault. A boiler technician will be able to run tests and determine the fault, and then fix the problem to the manufacturer’s specifications.

My radiators are cold

Your radiators may not be heating for any number of reasons, from complicated to boiler issues to frequent central heating problems, such as air in the system. Our engineers will determine the issue and quickly repair your heating.

How do I know my boiler is working safely and efficiently?

As part of your annual boiler service, the technician will check all of the seals, clean out any built up debris and test to ensure everything is safe and working at it’s best. Keeping your boiler serviced at regular intervals will not only improve the efficiency, but also ensure it is safe.

Should I DIY a Boiler Service?

We strongly recommend that you do not service your own boiler, unless you are a trained professional. Boilers can be dangerous, often combining water, electricity and gas, as well as other fuels. Any gas work must be carried out by a Gas Safe registered technician, who has been specially trained to ensure your boiler is safe.

A professional boiler engineer will also ensure all of the correct checks are conducted to the manufacturer’s standard. They will be able to clean the system, determine faults and carry out repairs.

Not only are boilers expensive, but they are also a central part of your home, providing heating and hot water. If something was to go wrong whilst servicing, you may invalidate your warranty and be left in the cold whilst waiting for a costly repair to be carried out.

How often should I service a gas boiler?

We recommend that you service gas boilers at least once per year. Not only will an annual boiler service keep your boiler efficient and help prevent breakdowns, but it will also ensure it is safe to use. 

A malfunctioning gas boiler can release dangerous carbon monoxide, which is both invisible and odourless. It is important that you always use a gas safe registered engineer to carry out gas boiler maintenance.

Does your gas boiler need a service? Check prices quickly and easily with our price checker tool.

Need a Boiler Engineer?

If you are looking for a local and trusted boiler engineer, we can help! With thousands of boiler engineers providing a nationwide service at amazing prices, why would you look anywhere else?

Requesting a personalised quote is quick and easy. You can use either our quick check price checker above or head over to our request a quote page.

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