Water Temperature Changes


Do you know that just one slight movement of the valve can cause water temperature changes in your home? When you turn the knob to slightly adjust the water temperature, you will notice that the temperature of the water changes drastically. There are several reasons why this thing happens as you continue to read below.

Most common problems with electric water heater

  • No hot water
  • Too hot water temperature
  • Inadequate hot water
  • Leaking storage tank
  • Leaking pipe connection
  • Rusty water
  • Bad odor
  • Rumbling noise
  • Higher pitched whining

To fix the above problems, you can call a certified HVAC technician.

Why water temperature changes with a slight movement of the knob

The thermostatic mixing valve may be dirty or rusty. The temperature valve uses a thermostat for setting the temperature of water. It also sets the amount of cold and hot water to distribute in order to have the desired temperature. It’s possible that calcium may have built up on your valve over time. The build up of calcium hinders the thermostat in reading the water temperature change. Therefore, a slight twist of the knob can cause drastic temperature changes.

This also happens in commercial buildings where a valve controls the changes in water temperature throughout the entire building.

Do-it-yourself fixing of water temperature changes

Fixing the valve is an easy job that you can just do by yourself. It’s as simple as cleaning the moving parts of the mixing valve. You can access it by removing the access panel and the handle. In the case of heavy duty commercial valves, they are often more accessible. However, different manufacturers assemble their valves differently; therefore, check out the manufacturer’s instructions for disassembling specific type of valve or it’s better to call an expert.

When you have disassembled the mixing valve, soak it in a mixture of vinegar and water. After cleaning it, spray the parts with clean water and reassemble it.

How to prevent drastic temperature changes 

Clean the temperature valve regularly, and perform a maintenance check up every 6 to 12 months. This time frame depends on the water quality in your area. Move the water temperature control knob once in a while to prevent building up of dirt and calcium in the thermostat and valve.

Maintaining your valve regularly will not only solve your water temperature changes but it will also preserve your heating and cooling system. Doing this will keep your family safe from health hazards caused by polluted water.