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No hot water? Here are some things you can check

  • 4 min read

Written by Domestic & General

If you are expecting warm water from your taps only to discover that you only have cold, it can be both unpleasant and inconvenient. This guide will help you to identify and solve common causes of hot water problems.

What to check first:

The first thing you should check if you have no hot water is whether your boiler is working. Depending on the type of boiler you have, the first sign that your boiler is not working will often be a change from the usual display colour along with an error code.

Check out our blog here on top boiler problems and ways to fix them.

Are all your boiler settings correct?

Despite already checking your boiler and it appeared to be working, there is a couple of other things you can check:

  • The boiler is set to the ‘on’ position for hot water.
  • The programmer is set to ‘heating and water’ rather than ‘heating only’.
  • Try resetting your boiler. Press the reset button if there is one, wait a few minutes, then switch it on again.
  • Check for any power cuts, the timer is working and the time is correct because the clocks changing can put your timer out of sync.

Do you have water gas and electricity supply?

If all the simple things with your boiler seem to be present and correct, check the gas and electricity supply to your boiler. 

If your boiler keeps tripping a fuse, you will need a Gas Safe engineer to come and find out why.

Is the thermostat set high enough?

It might sound a bit silly, but the thermostat and other boiler controls sometimes are changed by accident. If you have kids who are always fiddling with things or you might have brushed against the dial as you walked past and accidentally turned it down. 

If your temperature is set below 21℃ your boiler might not come on at all, so you will need to increase it. If you are not getting any reading on the thermostat panel you might need to change the batteries.

Is it a water pressure issue?

If you still are not getting the comforting warmth you expect from your boiler, look at the boiler pressure. If you notice the water from your hot taps is running at a lower flow rate than usual, you may have low water pressure.

Look at the gauge on the front of your boiler. It should show a reading of between 1 and 2. Anything below one bar is low, whilst anything above 2.75 is high. 

Do you have a frozen pipe? 

If your hot water is not working when temperatures outside have been low, you could have a frozen pipe. Signs of a frozen pipe are:

  • There is no water from the hot taps or only a trickle
  • You can visibly see a pipe is frozen over
  • You notice odd smells coming from taps or drains

If you find a pipe frozen, you can try thawing them by pouring warm (never boiling water as it can cause thermal shock) over them or wrap a hot water bottle around them until they defrost.

Are your radiators warm?

If your boiler’s working but there is no hot water, check your heating. Are the radiators cold when the heating’s on, or are there cold spots?

If there are, there could be a build-up of matter inside the radiators, restricting water flow. A heating engineer can fix this issue by conducting a system Powerflush.

Do you need to contact a professional?

The issues listed above are all things you can safely check yourself, but it is worth remembering that your boiler uses gas and can be dangerous. Hopefully, this checklist has helped you diagnose why you have no hot water.

If you are still not having any joy, click here to be taken to My Account to book a repair.

There are plenty of simple fixes that you can make around your house to keep your appliances working this winter. Check out our dedicated Be Winter Ready page for all our heating hints and tips here.