Why Shower Mixing Valves Can Cause Problems, and How to Fix Them

Why Shower Mixing Valves Can Cause Problems, and How to Fix Them

Have you ever turned on your shower and had to deal with scalding hot or freezing cold water? Or maybe you noticed that your water pressure is just not what it used to be? These are all common problems that can be caused by issues with your shower mixing valve. In this blog post, we’ll explore some of the most common shower mixing valve problems, what causes them, and how to fix them.

Low Water Pressure

If you’re noticing that your shower just isn’t producing as much water pressure as it used to, there’s a good chance that your shower mixing valve is to blame. This problem is often caused by a build-up of minerals and sediment within the valve. Over time, these deposits can accumulate, obstructing the flow of water and reducing the pressure. To fix this problem, you’ll need to clean or replace the valve. If you’re not confident doing this yourself, it’s always best to call in a professional plumber.

Scalding Hot or Freezing Cold Water

One of the most frustrating shower mixing valve problems is when you’re forced to deal with water that’s either too hot or too cold. This often happens when the valve is not correctly calibrated. If the valve is set too high, you’ll get hot water that’s dangerously hot, while setting it too low can result in freezing cold water. To fix this issue, you’ll need to adjust the valve – a process which, again, is best left to a professional.

Dripping or Leaking Valve

If you’ve noticed water dripping or leaking from your shower mixing valve, this is a clear sign that something is wrong. In most cases, this problem is caused by a faulty valve stem, which can become worn or damaged over time. A plumber will be able to replace this part for you and get your shower back to working like new.

No Hot Water

If you’re turning on your shower and finding that there’s no hot water coming out of the faucet, this is a clear indication that there’s a problem with your shower mixing valve. This issue is often caused by a malfunctioning or damaged component – such as the thermostat – within the valve itself. Again, it’s best to call in a professional to diagnose and fix this issue.

Old or Outdated Valve

Finally, one of the most common shower mixing valve problems is simply that the valve is old or outdated. Over time, valves can become worn or outdated, leading to performance issues and the need for replacement. If you’re noticing any of the above problems, or you just have an older valve that’s causing you issues, it may be time to replace it. A plumber can help advise you on the best replacement valve for your needs and install it for you.


As you can see, shower mixing valve problems can be frustrating and even dangerous. If you’re experiencing any of the issues we’ve covered in this post, it’s important to call in a professional plumber to diagnose and fix the problem. Remember, trying to fix these issues yourself can be dangerous, and could even make the problem worse. With the help of a plumbing expert, you can enjoy a fully functional, safe, and reliable shower without any of the headaches that come with a malfunctioning valve.