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Reasons Your Water Temperature Fluctuates In the Shower

Reasons Your Water Temperature Fluctuates In the Shower


Nothing is as frustrating as a shower with fluctuating temperature. There are myriad reasons for this shifting ranging from malfunctioned valves to tank sizes. Identifying the culprit helps in resolving it from happening again in the future.

Here are some of the reasons.

Malfunctioned Pressure Valve

Sometimes, shower temperature fluctuations occur when nearby plumbing components are overextended, like a flushing toilet. The culprit here is your shower valve. By replacing it with a pressure balancing valve, you will have solved the problem. Such a valve when appropriately installed maintains water temperature regardless of changes in water supply nearby. For this to properly function there needs to be an equal amount of pressure on both the hot and cold water which will prevent scalding.

Malfunctioned Thermostat Valve

The thermostat in your shower is crucial when setting precise water temperature. If it malfunctions, temperature fluctuations become a regular phenomenon. You can solve it and even upgrade to a smart thermostatic valve with the help of specialized plumbers. The intelligent valve not only allows you to set preferred temperature but also the volume and the force of water from the source.

Inadequate Heater Size

Studies show that most homes have about 50-gallon water heaters. The amount implies that at a given time, you have 50 gallons of warm water to use because the heater needs time to heat more. If multiple people at home at showering each spraying out 5 to 15 gallons of water a minute, the hot water will run out fast leaving you at the mercy of cold water as the heater tries to heat more quickly. The viable solution is installing heaters with tremendous water holding capacity.

Tankless Heaters

To reduce energy bills, most homes use a tankless heating system in the showers. Showering water is heated when needed. However, it comes at a price, cold water sandwich, a condition in which the heaters switch off giving room for cold water to lash out creating the fluctuation. The problem can be solved installing a mini mixing tank or tankless heater designed to prevent this.

If you are looking for state of the art water heating service provides, contact Dependable Service Plumbing.


“We had an outstanding experience with Dependable Service Plumbing in our remodeling of our master bathroom. In addition to their exceptional work, they were very concientious in their clean-up to include the cleaning of our hardwood floors while on their hands and knees. They arrived when we were told to expect them. They made it a point to ask us if their work was completed the way we wanted. We greatly appreciated their professionalism.” –-Theresa G.