Why is my water super hot all of a sudden?

If your water heater is making hot water too hot all of a sudden, it’s likely the result of the temperature setting being too high, a malfunctioning thermostat, high mineral content, or the pressure relief valve is blocked. Each of these issues can cause the water from the faucet to come out too hot.

How do you fix a shower that is too hot?

Adjust the Shower Valve

  1. Remove the handle. You may need a screwdriver to do this.
  2. Take off the metal cover beneath the handle, exposing the valve stem. …
  3. Turn the RSL two notches in whichever direction desired, then put the RSL back in place.
  4. Replace the faucet handle, then test the mixture of hot and cold water.

What causes my hot water to be too hot?

An overheating electric water heater is a sign of a malfunction and could lead to the unit leaking or breaking down. Common causes of water being too hot include a faulty thermostat, stuck pressure relief valve, sediment affecting the heating elements, or a failing heating element.

Why does shower water go from hot to cold?

Your shower has faulty pressure-balancing valves.

Faulty valves are common causes of temperature fluctuations in the shower. The pressure-balancing valves, also known as thermostatic mixing valves (TMV), blend cold water with hot water to provide constant and safe shower temperatures, preventing scalding.

How do I know if my water heater thermostat is bad?

How Do I Check My Water Heater Thermostat?

  1. No hot water – This most likely indicates a problem with the upper thermostat.
  2. Not enough hot water – This most likely indicates a problem with the upper thermostat.
  3. Slow hot water recovery – This is another problem that can occur when the lower thermostat is malfunctioning.

Why is one shower hotter than the other?

What’s most likely happening is a problem with the shower’s mixing valve. The mixing valve is a control valve that creates the balance in the flow of water from the hot water line and the cold water line and blends the two together for your desired shower temperature.

Where is the mixing valve located?

You can see the trim on the shower faucet, but the actual valve is behind the wall and is permanently connected to the plumbing. To replace it, you need an access panel through the shower wall, and if it isn’t designed into your bathroom, you’ll have to cut one.