Possible Reasons Why Water is Too Hot

Posted on: January 27th, 2017 by tustin-plumbing

When the hot water that comes from your home water heating system is too hot, the immediate reaction is to suspect a defective thermostat. But is that the only possible reason? No! There are a few more potential causes why the water is too hot. Let’s take a look at the common causes.

Gas Valve Assembly

Those who own a water heater know that the temperature is controlled directly from its thermostat. So it follows that if the thermostat is defective, it would be difficult to get the right temperature setting, which affects the proper level of heat that the water reaches.

The thermostat of the water heater is part of the gas valve assembly. How do you determine if the problem is with the thermostat or the gas valve assembly? The best indicator that the water heater has a defective gas valve assembly is if the burner continues to operate even when the thermostat has reached the lowest setting. What do you do?

The first thing to do is to turn off the gas supply to the water heater. You would need to replace the faulty gas valve. Now, it is important to point out that such a replacement procedure is not easy to do, so it is highly suggested that a professional be hired to do the job.

Faulty Thermostat

The role of the thermostat is to identify the maximum temperature setting for the water. What happens when the thermostat becomes defective? It would be difficult to check whether the right temperature is being set to heat the water. How would you know that the thermostat is defective?

The usual method is to open a hot faucet that is nearest to the thermostat. The thermostat should be at its highest setting. With the help of a thermometer, check whether the temperature of the water matches the setting of the thermostat. A discrepancy of at least 20 degrees is an indication of a defective thermostat. For reasons of safety, do this test with the thermostat set at 120 degrees.

Before you replace the thermostat, it is important to understand that compared to gas valves, thermostats are more reliable and rarely have to be replaced. The problem mostly resides in improper thermostat settings. This means the problem may not be with the device itself. How would you know? Test different adjustments for the thermostat and if this fixes the problem, then there is no need to replace it; otherwise, have a licensed plumbing professional do the replacement.

Heating Element

Why would a faulty heating element cause the water to be too hot? You should understand that when the heating element gets shorted out, it will cause the heat to be continuously generated resulting in the water getting too hot. How will you know if the heating element has shorted out?

The best way to determine if the heating element is faulty is to get a multimeter. This will allow you to test the heating element for shortage. Most of the time, ungrounded heating elements will be prone to shorting out and will constantly burn out.

It is best to make sure that there is proper grounding for the heating element of your water heating system. Unless you have a good grasp of electricals, it is better to call on a professional to put in the grounding wire to fix the problem.

These possible causes should give you a good idea why the water is too hot. Now, it is equally important to point out that these are not the only possible reasons. To get a better understanding and clearer picture why you are having problems with the water temperature, call a licensed plumbing professional in water heater repair and other plumbing problems.

Tustin Plumbing is your home plumbing repair solutions.

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