Why Fluctuating Water Temperature May Be More Than a Thermostat Issue
Posted in Hot Water Heater Repairs , on February 25, 2026
Fluctuating water temperatures can be extremely inconvenient. There is nothing worse than hopping in the shower and being met with a sudden rush of scalding hot water. Bathing aside, inconsistent temperatures can also impact cooking, cleaning, and other aspects of everyday life. While many homeowners are quick to blame their thermostat, the truth is that temperature fluctuations may just be a sign that you need water heater repair in Fort Lauderdale. An aging or damaged water heater often leads to inconsistent water temperatures even when your thermostat is set to the right temperature. To preserve consistent water temperatures in your home, choose an experienced plumber in Fort Lauderdale. With decades of experience and reputable plumbers on call, Broward Plumbing is here for all your water heater repair and replacement needs. Water issues repairs are best left to a professional plumber in Fort Lauderdale.
Here’s what you need to know about why your water heater isn’t keeping water temperatures consistent.
When the Thermostat Isn’t the Real Problem
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Thermostats are responsible for measuring the temperature of the water inside the water heater tank and signalling when heating elements should turn on and off. Unless your thermostat is set to the wrong temperature, it is unlikely that it is behind inconsistent water temperature. In fact, fluctuations in water temperature are almost never associated with thermostat issues. The root cause of this problem is usually related to what’s happening inside the water heater tank itself.
Calling in a professional plumber in Fort Lauderdale to resolve water heater issues can help you avoid misdiagnosis.
Sediment Buildup Inside the Water Heater
Sediment buildup is one of the most likely causes of inconsistent water temperatures. Sediment refers to minerals that sink to the bottom of your tank due to hardwater, which is very common in South Florida due to the region's hard water. Over time, mineral buildup can disrupt water flow and heating capabilities. This is because mineral falls to the bottom of the tank, creating a barrier between the burner and the water, slowing heating times. If you notice popping sounds from your tank or a reduced hot water supply, there is a good chance that you are experiencing sediment buildup.
Failing Heating Elements or Burners
A damaged or failing heating element/burner can also contribute to inconsistent water heating. Most water heaters have two heating elements, and when one fails, water temperatures can fluctuate. In some cases, a heating element may wear down and turn on and off, leading to such inconsistent water temperatures. In many cases, heating elements can also fail entirely, leading to a lack of hot water.
Aging or Undersized Water Heaters
As water heaters age, internal components wear down, and sediment buildup reduces efficiency, making it harder for the tank to maintain a consistent water temperature. If your household demand has increased, the system may struggle to keep up, leading to temperature drops during normal use. The best way to diagnose the issue is with the help of a professional plumber in Fort Lauderdale.
Reduce Water Temperature Fluctuations with Broward Plumbing
If you are struggling with inconsistent water temperatures in your home, you may be quick to blame your thermostat even though it is an unlikely culprit. Fluctuating water temperatures often point to an issue with the water heater itself, which should be addressed with professional water heater repair in Fort Lauderdale. If you are struggling with your water heater, don’t bother with DIY remedies. Call Broward Plumbing’s professional plumbers in Fort Lauderdale for repairs.