Why is My Electric Shower Going Hot and Cold?

Why is My Shower Either Scalding Hot or Freezing Cold?

If your electric shower keeps going hot and cold, a few common culprits could be to blame. Figuring out the cause is the first step to fixing the problem.

Water Pressure Problems

Your shower relies on steady water pressure to heat water properly. If the flow rate changes, the temperature can start acting up.

Limescale Buildup

London’s hard water is notorious for causing limescale buildup in showerheads, pipes, and units. This can restrict water flow, lowering pressure and leading to your electric shower going hot and cold.

Debris in the Valve

Sometimes dirt or debris gets stuck in the shower’s flow valve, messing with the water flow. When that happens, the heating element struggles to keep the temperature steady, and you’re left with an unpredictable shower experience.

Low Water Pressure

When your mains water pressure is too low, your shower might not get enough water to heat properly. This is especially common during busy times when everyone in your area is using water.

Electrical Faults

Electrical problems with your shower can seriously affect its performance. Since electric showers heat water on demand, any electrical issue can be both inconvenient and potentially dangerous, so it’s always best to call a qualified electrician to check things out.

Faulty Heating Element

This part is what heats the water. If it’s worn out or broken, you’ll run into issues like the electric shower keeps going cold or hot. For peace of mind and safety, always use a professional for electric shower replacement.

Thermostat Issues

The thermostat is what keeps the water temperature just right. If it’s not working properly, you might get a shower that’s either scorching or icy, which can quickly ruin your day.

Thermal Cut-Out (TCO) Activation

This is a safety feature that shuts off the heating element to prevent overheating. But if there’s a blockage, the TCO can kick in unnecessarily, leaving you with water that’s all over the place temperature-wise.

Combi Boiler Problems

Electric showers heat their own water, but if your home has a combi boiler, you might still run into issues when the boiler is struggling or under high demand.

High Demand on the Boiler

If you’re using multiple hot water outlets at once, like running the shower while the washing machine is on, it can overwhelm the boiler. This makes it harder to keep the water temperature steady, which could leave you with a cold shower.

Faulty Combi Boiler

If your boiler isn’t working properly, it can mess with the hot water throughout your home. This means inconsistent performance and annoying issues, like even the new electric shower going hot and cold.

Thermostatic Mixer Valve Problems

A thermostatic mixer valve (TMV) keeps your water at a steady temperature by mixing hot and cold water. But if it stops working properly, it can’t regulate the mix like it should. This means you might suddenly have your electric shower keeps going hot and cold, which is not fun.

Seasonal Temperature Changes

Ever notice your shower acting up when the seasons change? That’s because the temperature of the mains water coming into your home changes too. In winter, the water is much colder, so your electric shower has to work harder to heat it up. If your shower’s power settings aren’t adjusted, the water might not get hot enough. On the flip side, in summer, the warmer water might make your usual setting feel way too hot.

How to Fix a Hot and Cold Shower? Step-by-Step Guide

Before doing anything, make sure the power to your shower is switched off at the main fuse box. Better safe than sorry!

Step 1 - Check the Shower Head and Hose

A blocked shower head could be messing with your water temperature. Soak it in a mix of vinegar and water to clear out any limescale, then give it a scrub with a toothbrush. Also, take a look at the shower hose. Kinks or damage can disrupt water flow. Replace it if needed, and you might see an instant improvement.

Step 2 - Inspect Water Pressure

Low water pressure can cause all kinds of problems, like your new electric shower going hot and cold. Test other taps in your home to see if it’s just the shower or a bigger issue. If the pressure is low everywhere, you might need to contact your water provider. Make sure all your valves are fully open, too. It’s an easy fix if they’re not!

Step 3 - Examine Electrical Components

If the problem seems electrical, like the heating element or thermostat, you’ll need a multimeter to test them. But unless you’re confident with electrical work, it’s best to leave this to a qualified electrician. They’ll be able to safely diagnose and replace any faulty parts.

Step 4 - Reset the Thermal Cut-Out (TCO)

If your shower overheated, the TCO (thermal cut-out) might need a reset. With the power off, check your manual to find the reset button and give it a press if your shower has one. Just make sure to figure out why it overheated in the first place (like blockages) to avoid it happening again.

Step 5 - Check the Thermostatic Mixer Valve (TMV)

A faulty TMV could be the reason for water temperature issues. This one’s a bit tricky, though, so it’s best to call in a plumber. They can inspect, diagnose, and replace the TMV if needed to prevent the electric shower keeps going cold or hot.

By running through these checks, you might just save yourself a call to a professional or at least have a better idea of what’s going on before they arrive!

When to Call a Professional?

Some shower issues are easy DIY fixes, but when it comes to electric showers, certain problems definitely need a pro. Knowing when to call an expert isn’t just about getting it fixed. It’s about staying safe.

• Electrical Issues: If the heating element, thermostat, or internal wiring is acting up, don’t try to fix it yourself. Electrical work is dangerous and needs a qualified electrician. Better safe than sorry!
• Boiler Problems: Think your combi boiler might be the problem? Time to call a Gas Safe-registered engineer. They’re the only ones legally allowed to handle gas appliances.
• Complex Plumbing Issues: Troubles like replacing a thermostatic mixer valve or unclogging internal pipes are jobs for an experienced plumber. Save yourself the hassle!
• When in Doubt: Not sure what’s causing the issue of electric shower going hot and cold, or just don’t feel confident tackling it? It’s always best to call a professional to handle it. Safety first!

Preventative Maintenance Tips for Your Electric Shower

Taking care of your shower doesn’t have to be a hassle, and a little maintenance goes a long way in keeping things running smoothly and avoiding issues like your electric shower going hot and cold.

• Clean Regularly: Give your shower head and hose a good clean every few months, especially if you’re in a hard water area like London. It’ll help stop limescale from taking over.
• Get a Pro to Check Things Out: Book an annual inspection for your plumbing and electrical systems. A professional can catch small issues before they turn into big, expensive problems.
• Keep an Eye on Water Pressure: Noticed your water pressure suddenly drop? Don’t ignore it. It’s worth checking out the cause.
• Insulate Those Pipes: When winter rolls around, make sure your pipes are insulated. It keeps the incoming water from being icy cold, making it easier for your shower to heat up. Simple fixes for a smoother shower experience!

Your Trusted Solution for Electric Shower Repairs in London

Is your electric shower going hot and cold and being a nuisance to your daily routine? We get it- it's frustrating! At Serviceteam, we know how important it is to have a reliable, safe shower you can count on. That’s why our team of certified electricians, plumbers, and Gas Safe engineers are here for you 24/7 across London.

Whether you need a brand-new electric shower installed, a quick fix, or a full system check, we’ve got the skills to sort it out. Here’s what we can help with:

• Electrical Services: We’ll safely diagnose and fix any electric shower issues.
• Plumbing Services: From low water pressure and blockages to valve replacements, we’ve got you covered.
• Gas & Heating: Our Gas Safe engineers handle boiler servicing and repairs like pros.
• Handyman Services: Need a hand with general property maintenance? Consider it done.

Let us take care of the hassle so you can enjoy your shower and your home- stress-free!

Frequently Asked Questions

How many electric showers can I have?

You can have more than one electric shower in your London home, but it depends on your water pressure and your electrical setup. Each shower needs its own circuit to work safely and reliably. It’s best to check with a qualified electrician to be sure.

Why does my shower go hot, then cold, then hot again?

If your shower can’t decide on a temperature, it’s usually down to water pressure changes or an issue with the electrical supply. Things like shared water usage, old pipes, or a faulty heating element could be the cause. A professional inspection should help figure it out.

Why does my Triton electric shower keep going hot and cold?

Your Triton shower might be acting up because of uneven water pressure, lime-scale buildup, or a thermostat issue. London’s hard water doesn’t help, as it can make lime-scale build up faster. Regular maintenance or a plumber’s visit should sort it out.

Can poor water pressure cause my electric shower to run hot and cold?

Yes. Poor water pressure is often the reason for those annoying temperature swings, especially in shared plumbing systems like in many London buildings. Adding a shower pump or a pressure stabilizer could fix the problem.

How do I fix an electric shower that keeps going hot and cold?

Start by checking your water pressure and cleaning off any lime-scale buildup. If it’s still misbehaving, the thermostat or heating element might need repair. Calling a certified electrician or plumber is the safest way to get it working properly again.