Have you ever turned on the shower only to wait patiently for the water to warm up, all the while feeling frustrated that your water heater is taking forever? This can be a real nuisance, especially when you’re in a rush. But don’t worry, there are many things you can try before calling a plumber. In this article, we’ll give you some troubleshooting tips to try before picking up the phone.

Check the Thermostat

Start by checking the thermostat on the water heater. If it’s set at a low temperature, it will take longer to heat the water. Raise the thermostat by a few degrees and see if that does the trick. Additionally, if the thermostat is defective, it could be giving incorrect readings. In this case, it would need to be replaced.

Flush the Tank

One of the most common causes of a slow water heater is sediment buildup in the tank. This can impede heat transfer and increase the amount of time it takes to heat the water. If it has been a while since your water heater was flushed, consider doing it now. You can do this yourself, or if you’re not comfortable doing it, it is best to call a professional.

Check the Heat Source

Your water heater’s heat source is another potential culprit. If you have an electric water heater, the heating element could be malfunctioning. For gas heaters, the pilot light could be out. These are both easy fixes, but it’s important to ensure you know what you’re doing before attempting it. If you’re unsure, call a plumber.

Size of the Tank

Finally, consider the size of the tank. If your household needs more hot water than your tank can produce in an hour, naturally it will take longer to heat up. Upgrading to a larger tank or installing a second tank may be necessary.


In conclusion, there are many possible reasons for a water heater taking a long time to heat up. While some of the troubleshooting suggestions covered above can be applied by homeowners, the more technical procedures should be done by a professional. At times, a water heater may need replacing if it is not heating up at all. At Cedar Park Plumbing, we specialize in all types of plumbing services, including water heater installations and repairs. So if you find yourself needing our assistance, give us a call today!