Shower Head That Attaches To Tub Faucet

Ah, the shower head attached to the tub faucet – a versatile solution for rinsing kids, pets, or even just enjoying a seated shower. But what happens when the water temperature isn't behaving? One of the most common complaints is inconsistent temperature: scalding hot water one minute, then icy cold the next. This frustrating issue usually has a fix, and many times, you can troubleshoot it yourself before calling in a plumber. Let's walk through a methodical approach to get your shower temperature back on track.

Step 1: Understanding the Problem

Before diving in, let's define the specific temperature issue. Is the water:

Constantly too hot?
Constantly too cold?
Alternating between hot and cold? (Temperature fluctuations)
Taking too long to reach the desired temperature?

Knowing this helps narrow down the potential causes. We’ll focus primarily on temperature fluctuations and water that is constantly too cold, as these are frequently DIY-fixable.

Step 2: Preliminary Checks (No Tools Required)

Start with the easy stuff. These are the checks you can do immediately without needing any tools.

Check Other Fixtures

Are other faucets in your home experiencing the same temperature issues? If so, the problem might be with your water heater itself, not just the shower faucet diverter. If all faucets are affected, skip ahead to the section on water heater issues.

Check the Faucet Diverter

The diverter is the knob or lever that switches the water flow between the tub faucet and the shower head. Ensure the diverter is fully engaged. Sometimes, if it's not completely pulled up or turned, it can cause water to mix incorrectly, leading to temperature problems. Push it firmly into position and test the water again.

Check Water Pressure

Is the water pressure normal in the shower head and tub faucet? Low water pressure can affect the water heater's ability to maintain a consistent temperature. Turn on other faucets in the house to see if they also have low pressure. If so, the problem may be a general water pressure issue in your home.

Step 3: Inspecting the Shower Head and Hose

Now, let's move onto visually inspecting the shower head and hose. For this, you still shouldn't need any tools.

Shower Head Clogging

Mineral deposits can build up inside the shower head, restricting water flow and affecting the temperature. Visually inspect the shower head face. Are there visible mineral deposits (white or greenish buildup) around the nozzles?

How to Address Shower Head Clogging (DIY):

Unscrew the shower head from the hose. (You may need pliers if it's on tight, but try hand-tightening first. Wrap a cloth around the connection to protect it from scratches.)
Soak the shower head in a solution of white vinegar and water (50/50 mix) for at least 30 minutes, or ideally overnight.
Use an old toothbrush or a pin to gently scrub away any remaining mineral deposits from the nozzles.
Rinse the shower head thoroughly with clean water.
Reattach the shower head to the hose and test the water temperature.

Hose Kinks and Damage

Inspect the shower hose for kinks, bends, or damage. A kinked hose can restrict water flow, leading to temperature fluctuations. A damaged hose can leak, reducing water pressure and affecting temperature.

How to Address Hose Issues (DIY):

Straighten any kinks in the hose. If the hose is permanently kinked, it needs to be replaced.
Check for leaks at the hose connections (where it connects to the faucet and shower head). Tighten the connections if necessary. If the hose is leaking from the hose itself, it needs to be replaced.

Step 4: Checking the Faucet Cartridge (Requires Basic Tools)

If the preliminary checks don't resolve the temperature problem, the issue might be with the faucet cartridge. The cartridge is the part of the faucet that controls the mixing of hot and cold water. A faulty cartridge can cause temperature fluctuations or prevent the water from reaching the desired temperature.

Tools Needed: Screwdriver (Phillips and/or flathead), pliers, adjustable wrench, possibly a cartridge puller (depending on the faucet type).

Identifying Your Faucet Type

Before you begin, it's crucial to identify your faucet type. Common types include:

Compression faucets: These have separate hot and cold handles.
Cartridge faucets: These typically have a single handle that controls both temperature and flow.
Ball faucets: Similar to cartridge faucets, but use a ball valve mechanism.
Ceramic disc faucets: These also use a single handle and are known for their durability.

The procedure for accessing and replacing the cartridge will vary depending on the faucet type. Search online for instructions specific to your faucet model. Many manufacturers have detailed diagrams and videos available.

Replacing the Faucet Cartridge (DIY - Proceed with Caution)

Important Safety Note: Before working on the faucet, turn off the water supply to the faucet. This is usually done by closing the shut-off valves located under the sink or near the water meter. Test the faucet after turning off the water to ensure it's completely shut off.

Remove the faucet handle. This usually involves removing a screw or set screw located on the handle.
Remove any decorative trim or escutcheons that cover the faucet body.
Locate the retaining clip or nut that holds the cartridge in place. Remove the clip or nut.
Carefully pull out the old cartridge. If it's stuck, you may need a cartridge puller tool.
Install the new cartridge. Make sure it's properly aligned and seated correctly.
Replace the retaining clip or nut.
Reinstall the decorative trim and handle.
Turn the water supply back on slowly. Check for leaks.
Test the faucet to ensure the temperature is working correctly.

Important Considerations:

Take pictures as you disassemble the faucet. This will help you remember how to put it back together.
Keep all the parts organized. Place them in a container to avoid losing them.
Buy the correct replacement cartridge. Take the old cartridge with you to the hardware store to ensure you get the right one. If you cannot remove the cartridge easily, find the make and model of your faucet and take that information to the hardware store.
If you're not comfortable with any of these steps, it's best to call a plumber. Incorrectly installing a faucet cartridge can damage the faucet or cause leaks.

Step 5: Water Heater Issues (Warrants Further Investigation)

As mentioned earlier, if the temperature problems affect all faucets in your home, the issue is likely with your water heater. Here are some potential water heater problems:

Sediment Buildup

Sediment can accumulate at the bottom of the water heater tank, reducing its efficiency and affecting water temperature. Draining the water heater can help remove sediment. This is a moderately involved DIY task, but instructions can be found online. However, if you're not comfortable working with gas or electricity, it's best to call a professional.

Faulty Thermostat

The water heater thermostat controls the water temperature. If the thermostat is faulty, it may not be heating the water to the correct temperature. Testing and replacing a water heater thermostat requires knowledge of electrical systems and should only be done by a qualified professional.

Broken Heating Element (Electric Water Heaters)

Electric water heaters have heating elements that heat the water. If one of the elements is broken, the water may not be heating properly. Testing and replacing a heating element requires knowledge of electrical systems and should only be done by a qualified professional.

Gas Water Heater Issues

For gas water heaters, issues can include a faulty thermocouple, pilot light problems, or a malfunctioning gas valve. These issues are best left to a qualified HVAC technician or plumber, as they involve working with gas lines.

When to Call a Professional

While many shower head temperature problems can be resolved with DIY solutions, there are times when it's best to call a professional plumber or HVAC technician. Here are some situations where professional help is recommended:

You're not comfortable working with plumbing or electrical systems.
You've tried the DIY solutions and the problem persists.
You suspect the problem is with your water heater, especially if it involves gas lines or electrical components.
You're experiencing leaks that you can't fix.
You're unsure about any of the steps involved in the repair process.

Working with plumbing and electrical systems can be dangerous if you're not properly trained. It's always better to err on the side of caution and call a professional if you're unsure.

Final Thoughts

Troubleshooting a shower head temperature problem can seem daunting, but by following these steps, you can often diagnose and resolve the issue yourself. Remember to start with the simple checks and work your way up to more complex repairs. And always prioritize safety when working with plumbing and electrical systems. With a little patience and effort, you can get your shower temperature back to normal and enjoy a comfortable and relaxing shower experience.