What does the diverter valve do in a combi boiler?

The diverter valve on a combi boiler works much like a lock on a canal would. It opens and closes to allow heat up both hot water and the water in the heating system which provides heat to radiators and towel rails.

How much does it cost to replace a diverter valve on a boiler?

The cost of a diverter valve can vary tremendously depending on the model of your boiler, but on average, they cost around £200, yet some manufacturers charge considerably more and do not include any labour costs. As well as the cost of the replacement diverter valve, you need to consider the cost of the engineer’s labour.

How does the diverter valve on a combi boiler work?

If a specific hot water tap is turned on, the combi boiler will heat water and the valve will direct the hot water to the tap rather than to the home’s radiators or other taps. If the heating is turned on, the combi boiler will do the same for the radiators.

What does it mean when your boiler diverter valve is jammed?

Another sure-fire sign is having to turn on the heating in order to get hot water to come through the tap. This means the valve is jammed open in the heating mode. If you are getting all the hot water you need, but no heating, first check all your time clocks and controls are working.

What to do if your diverter valve is faulty?

If you suspect that your diverter valve is faulty, we recommend that you call an engineer registered with the Gas Safe Register to take a look at it for you. While certain checks can be as simple as removing the boiler cover and looking for the diverter valve, it is illegal to carry out any maintenance on your boiler.

What does a diverter valve on a boiler do?

Your combi boiler diverter valve is a valve that opens and closes to provide heat to the radiators or to heat your water. The diverter valve will always give priority to your hot water, so if you turn your heating on, and then a hot tap, it will heat the water to the tap first.

What should I do if my boiler diverter is stuck?

After you remove the lid of the boiler, you have to locate the diverter valve mechanism. Run tap water on hot and observe the diverter valve. If you run hot water, the valve is supposed to close in order to divert it to the tap, meaning it should move. If you see no movement, then it’s stuck. Need a professional to fix your boiler diverter valve?

When does a hot water diverter valve open?

When it comes to a home heating system, the diverter valve would open in order to let the heat reach the radiators. Once there is a demand for hot water in the tap or showerhead (usually when you switch on the hot water), the valve would close.

How much does it cost to replace diverter valve in combi boiler?

When having a new Combi boiler installed, it will have a diverter valve fitted as standard. However, should it need replacing you’ll need to buy a new one. The diverter valve itself will likely cost around £75 – £200 but this doesn’t include the cost of installation which will vary depending on the engineer carrying out the work.