Why is My Shower Cold? [5 Plumber’s Input]

If you’re like most people, you enjoy a nice, hot shower first thing in the morning. But if your shower suddenly turns cold, it can be quite a shock!

There are a few possible reasons why this could happen, and we’ll explore them below. So if you’re wondering “why is my shower cold?” read on for some answers.

ensure optimal water pressure

Check the water pressure – if it’s too low, the shower won’t get hot

I’m often asked why the showers aren’t getting hot. Most times, it comes down to a simple issue – inadequate water pressure.

Low water pressure can prevent the hot water from flowing freely through your showerhead, leaving it unpleasantly cold.

For this reason, it’s important to maintain adequate water pressure in your shower – between 40 and 60 PSI is ideal. This can be easily tested with an affordable digital gauge at any plumbing supplies store.

If you’re having issues with your shower not getting hot enough, I would highly recommend checking your home’s water pressure as a first step toward resolving the issue.

In most cases, simply increasing the flow of hot water will solve the issue and ensure you enjoy showers at their full potential!

Make sure the water heater is turned on and set to the correct temperature

turn on water heater

As a professional, I have seen many homes that suffer from incorrect settings in their water heaters. Not only can this lead to inefficient use of energy, but it can also result in cold showers and other unpleasant surprises when turning on the faucet or showerhead.

Leaving the heater off or setting it at an incorrect level can cause several issues. If the water temperature is too low, you might find yourself taking cold showers in the morning.

It’s also possible that the hot water could run out before everyone in the house has finished showering.

Alternatively, if the water heater is set too high, there’s a risk of scalding yourself or others with dangerously hot water flowing from the faucet or showerhead.

Furthermore, incorrect settings on the water heater can lead to inefficiency as more energy will be required to heat up cold water coming from the supply lines.

To make sure everyone experiences comfortable and safe showers, make sure to turn your water heater on and adjust its settings accordingly. This small task can have a significant impact on your home’s comfort levels.

A malfunctioning water heater can also cause issues and high bills due to wasted energy, particularly in colder months.

If you notice cold showers, despite the water heater being turned on and set to the correct temperature, it could be a sign of a malfunctioning device.

It’s important to call in a professional immediately if you suspect that your water heater is not working correctly as this can create serious safety hazards for everyone in the home.

Inspect the showerhead for mineral buildup, which can restrict water flow

A clogged showerhead can be a major nuisance. This is because it can cause the water flow to become restricted, leading to weak pressure and an unwelcome cold shower experience.

clear showerhead for proper mix

One of the most common culprits for clogs is mineral buildup over time. This buildup forms from the minerals present in hard water, and it can be somewhat difficult to detect at first.

Therefore, it’s important to conduct regular checks and inspect any showerheads for signs of mineral buildup which might be causing cold showers.

Mineral buildup usually appears as a chalky residue on the surface of the showerhead and/or pipe connections.

If you suspect your showerhead may have this problem, I’d recommend cleaning it with vinegar and warm water solution as soon as possible so that your showers remain hot and enjoyable. Safely boiling any metal parts followed by a thorough scrubbing could help too.

To prevent this issue in the future, consider investing in a reliable water softening system to reduce hard water deposits in the first place. Doing so could save you trouble and even money in the long run!

Check for leaks in the shower – they can cause cold water to mix with hot

It’s not uncommon for homeowners to experience a blast of cold water when they have the expectation of hot. This can often be caused by a leak in the shower.

fix leak in the shower

Leaks in showers can cause hot and cold water to mix – leading to a cold shower – which can be difficult to diagnose without hiring a professional.

That’s why it’s always important to check around the edges of your shower, inspect the pipes leading up to it, and make sure everything is sealed tight with no visible evidence of water seepage.

If you do find any leaks or feel that something isn’t quite right, it may be time to call on the expertise of a plumber who can identify the exact cause – from loose fittings or pipe deterioration – and suggest ways to fix them quickly and provide more efficient use of your hot water system leading you to enjoy more showers that are the perfect temperature all year round.

Adjust the mixing valve to see if that makes a difference in the temperature

Many people experience temperature issues in their showers, either because the water isn’t hot enough or because it shifts between being too hot and too cold.

The cause of these fluctuations can depend on a variety of factors, but one possible solution is to adjust your mixing valve.

balance shower mixing valve

To check if this will help the issue, first make sure that there’s plenty of pressure coming out of both the hot and cold lines attached to the valve body.

Next, you’ll want to turn off both the hot and cold water valves located beside the mixing valve before slowly but steadily turning the adjustment screw with an Allen key until you reach your desired temperature.

It may take several attempts before finding the perfect balance, but once you have made any necessary adjustments – and checked for leaks – you should be able to enjoy an ideal showering temperature!

If adjusting your mixing valve doesn’t help solve your problem, or if it seems like something else could be going on, then consider calling a professional plumber for further assessment and repair work.

They can evaluate all existing connections and make sure that everything is installed correctly for a comfortable hot shower.


To sum up, if you are experiencing cold showers then there could be a variety of causes, from mineral buildup or leakage in the pipes to problems with your mixing valve.

It’s important to inspect for any signs of damage or blockage and to clean away any sediment or deposits regularly.

You may also want to consider investing in a water-softening system to reduce hard water deposits in the future.

Finally, if any of these measures don’t seem to be helping or you are still unsure, then it’s best to call on the expertise of a professional plumber who can investigate further and suggest solutions tailored to your individual needs.

By following this advice, you should soon be able to enjoy showers with the perfect temperature all year round.

Good luck!

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