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The diverter valve is an important part of a property’s heating system. And, like any other part, it’s possible for it to get damaged through general wear and tear. If you experience an issue with the diverter valve of your combi boiler, your heating system wouldn’t work as efficiently as it normally should.
An issue with the diverter valve would require opening up the boiler and tinkering with the mechanism. The Fantastic Services team recommends leaving these tasks in the hands of capable technicians. So, this article is for all of you who wish to get an overall education on how to free a stuck diverter valve.
A diverter valve is a mechanism inside your boiler used to control the flow of water through your entire heating system. This includes your taps and showerheads, and radiators. Through the diverter valve, a combi boiler will control the flow of hot water depending on which fixture is being used.
System and conventional boilers don’t require a diverter valve, since they store the hot water in a cylinder. You can only find it on a combi boiler because they heat the water on demand. A boiler’s diverter valve has the same function as the one on a showerhead – it controls the flow of hot water to different destinations.
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. If you’re not using the taps or showerheads, the diverter valve would stay open to keep the radiators warm.
There are three most commonly occurring plumbing issues if you happen to have a faulty diverter valve. They are as follows:
Let’s assume that you are experiencing the most common symptom of a faulty diverter valve – not getting hot water. In order to test and know for sure that’s where the problem is, here’s what you should do:
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We don’t recommend fixing the diverter valve yourself. If you think there’s a problem, you should call a qualified engineer to have a look at it.
Before doing anything to the diverter valve unit, it’s important to look over the entire mechanism of the boiler. Even if you’re 100% certain the valve is faulty, there could be another issue as well. Tinkering with parts of your boiler could result in additional damage.
If the valve is the only issue, it probably got stuck due to corrosion. There are commercial chemical cleaners for boilers on the market. However, it’s important to know which one to use and when to use it. If you’re not careful you might cause additional damage to your boiler mechanism.
A reliable boiler technician will perform the right checks and in the end will determine whether they should clean the stuck diverter valve, or replace it with a new one altogether. Replacement of the whole diverter unit is a delicate procedure and should be performed only by a certified engineer.
The professional technicians from Fantastic Services DO NOT recommend for any homeowner to do boiler repairs on their own (if they’re not certified technicians themselves). If you attempt to do anything to the mechanism, you could lose your warranty. If your boiler is out of warranty, you would have to pay for the repair and replacement of parts from your pocket. The reliable technicians from Fantastic Services are always ready to help with any boiler issues you may have.
And, if you join our Fantastic Club, you’ll get reduced rates and preferential booking slots for more than 25 services, including boiler repair. Find out what Fantastic Club is.
If you find that you have hot water but no heating (or the opposite), a faulty diverter valve is the likely culprit. But that’s not always the case. If you have found yourself with no heating or hot water, take a look at our blog post on the topic next to find out what you can do.
Have you ever had to deal with a stuck diverter valve at home? How did you handle this issue? Share your experience in the comments!
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