Water Heater Not Heating.
If your water is not heating, this article will highlight the possible cause of the problem and the parts that could need changing. We have arranged this so that the most probable cause why your water heater is not heating is the first cause 1 (thermocouple) and the least likely cause 10 (igniter). You can walk your way down against the different causes until you find the possible cause of (thermocouple) and the least likely cause 10 (igniter). You can walk your way down against the different causes until you find the possible cause of your water heater heating problem.
Most frequent causes for water not heating.
Thermocouple is present in some of the available gas water heaters. The main work of a thermocouple is detection of pilot flame. In any case that the thermocouple fails to recognize a flame the gas valve is inhibited from opening.
The gas burner has a water heater which is ignited by the pilot. The water heater stops functioning when the pilot does not ignite. The reason for the pilot not lighting could be due to accumulated carbon in the pilot which prevents gas passing through. These carbon deposits can be cleaned using a stiff brush or compressed air. Replacements should be done when the carbon deposits in the pilot cannot be removed.
Gas valve and thermostat assembly.
The gas valve is closed when the heater is not in use and when in use it opens for air to reach the burner. If the gas valve is defective such that it cannot open, the gas does not enter the burner and thus it does not light stopping the water heater from working also. To counteract this situation before considering other options you should at first check whether the igniter is properly working. The second thing to confirm is whether the gas valve has pressure. When you notice that the two are not faulty i.e. the igniter is working and the gas valve has pressure and still the gas does not light you should replace both the gas valve and the thermostat.
Draft inducer motor.
The draft inducer motor has a fan that sucks in air into the burner then expels it through the flue. A vacuum switch is closed when the air drawn passes the draft inducer assembly which shows that the air is flowing at a good rate. Heating stops when the inducer motor is faulty and over a duration of time the bearings on the inducer motor wear out. The ignition process can be a problem when the vacuum port is plugged since it is not possible to close the vacuum switch.
Cold water passes through the dip tube in order to reach the bottom of the tank for heating by the burner. When the dip tube is broken or cracked the water does not heat since it leaks before reaching the tank.
The ignition module has a main function of lighting the burner by simply cycling the igniter or sparker on to light it. When the ignition module is faulty the burner does not light. To confirm whether the ignition module is defective you should find out if the power is reaching the ignition module. If power reaches the ignition module yet the burner does not light the ignition module should be replaced.
A multimeter test for continuity is performed on the heating element to check whether it is faulty. If the test shows it does not have continuity just replace it with another one.
When the intended airflow is achieved the pressure switch shuts down instructing the control board to continue the heating process. When the pressure switch is faulty the ignition process comes into a standstill making the water heater not to heat.
This part detects the amount of temperatures in the water heater and then controls it to the required range. In case of the thermostat being faulty you should replace it.
The pilot is lit by the igniter. Immediately the pilot lights completely, passing through the gas valve, the gas reaches the main burner where ignition goes on. If the igniter is faulty it in turn sanctions the pilot from lighting thus causing the ignition process to come into standstill.
Water Heater Leaking.
If your water heater is leaking this could be a big problem for your equipment which disable its operations. There are two main reasons for leakages that have been well summarized in this article. You should take a look at these two parts that when defective renders the water heater not useful. Temperature and pressure relief valve has a high chance of causing leakages compared to the drain valve and thus it should be tested at first to confirm whether it is faulty.
Main causes for water heater leaking.
Temperature and pressure relief valve.
The temperature and pressure relief valve is useful in maintaining the temperatures and pressure of the heater when they go beyond the set levels. This happen by the temperature and pressure valve opening at the set temperature in order to lower them back to the constant settings. The set temperature is specified on the water heater. You should replace the temperature and relief valve with another one when it opens before the specified relief temperatures have been arrived at.
Opening the drain valve empties the water heater during maintenance or even when expelling out accumulations from the tank. In case of a leakage on the drain valve it is at best if you empty the tank and replace the drain valve.
Water Heater Not Lighting.
Is your water heater not lighting? If this is the case then the following explanations are the possible causes for this problem. The conditions and parts have been depicted in an order of the most probable reason for the leakages to the least probable reason as the list goes down. In events of not lighting you are supposed to test each part that has appeared as one of the reason. Since there are some parts which have a high chance of causing the lighting problem they are the ones you begin testing for any faultiness in them.
Main reasons for water heater not lighting.
There are water heaters that have been designed and manufacture to be ignited by the use of an igniter. When the igniter stops working the burner does not light. To confirm whether truly the igniter is faulty, you should ensure the voltage is reaching the igniter. If the voltage reaches the igniter but it does not gleam then you should replace the igniter since it is defective.
When the right air flow is arrived at the pressure switch shuts down and this action enables the control board to continue the ignition flare up process. When the pressure switch is faulty, the flare up process comes to a standstill thus the burner does not light.
The flame from the pilot is recognized by the thermocouple. The ignition process does not happen when the thermocouple fails to distinguish the flame from the pilot and thus the burner does not light.
The gas burner which has a water heater is ignited by the pilot. When the pilot fails to ignite the water heater also does not light. The pilot can fail because of reasons like accumulation of carbon on the pilot which form a barrier. The carbon barriers can be done away with by using a stark brush or pumping air on the pilot which leaves it clean and not barred. You are supposed to replace it if it cannot be cleaned.
Lighting the pilot flame in some water heaters could require a spark electrode. The working of this spark electrode is by providing alternating high-voltage sparks to flare up the pilot. If this electrode does not give up sparks it is most likely faulty. In this case you are supposed to replace the electrode.
Water Heater too Hot.
Have you noticed that your water heater is too hot considering the water usage in your household? This is a symptom showing that one of the parts of your water heater is defective. This article gives a list of these parts which can lead to these problem detailing them with the most likely part to cause the water heater to heat higher than required as the first and the least likely as the last. As you read down the parts you acquaint yourself with knowledge on how they cause the abnormal heating to your device and thus when testing to check which part is fault you should start with the most probable part which is the gas valve and .thermostat assembly and the other parts follow.
Most frequent reasons for water heater being too hot.
Gas valve and thermostat assembly.
The thermostat is used to control the temperatures up to a maximum point that is already set. A faulty thermostat can make the temperatures of the waters not to be set at the proper levels. When confirming whether your thermostat is not working you should check temperatures of hot water from the closest faucet. If you find out that the temperatures of the hot water are higher than the selected thermostat setting this is a good sign that the thermostat is defective. In this case you should replace the gas valve and thermostat assembly. To avoid scalding a recommended set temperatures of 120 degrees or fewer should be used for your water heater.
When the heating element has a short it will end up heating continuously which can make the water hot than the required levels. To confirm whether the heating element is shorted out a multimeter is used to check whether it is faulty. You should replace the heating element if it shorted out.
The highest temperature that can be reached in a water heater is controlled by the thermostat. A faulty thermostat leads to improper temperature level settings. If you want to confirm whether the thermostat is defective you should check hot water temperatures from the closest faucet. A faulty thermostat should be replaced. The maximum temperature should be set at 120 degrees to avoid scalding.
How to maintain your water heater.
The water heater should be drained once or twice in a year.
Accumulations of sediments that have settled in the water heater lowers the working of the heater and thus it should be removed by this action of draining. The manual instructions have the right way to drain it.
Temperature settings should be set at the right levels for your household to maximize efficiency.
Water heaters have controllable temperature settings that can either be increased or lowered to a certain maximum level. In most households the temperature settings are set at higher maximum level than for their usage. In such a case energy is wasted since the water remains at high temperatures throughout the day even when sleeping or when they are not at home. A maximum setting of 120 degrees Fahrenheit (48oC) is the best for households since it does not lead to a lot of wasted energy.
Vacation setting should be used when you are away.
For those who are going away for a holiday or a vacation for a longer duration you should use the vacation setting. When this setting is equipped it leads to lower energy consumption.
In case there are leakages replace the temperature and pressure relief valve.
Water heater FAQs.
What is the life expectancy of my water heater?
The predicted duration of a water heater to last is 10-15 years. This duration for a water heat can be deducted due to presence of minerals in the flowing water, also when the temperature settings are continuously higher than the recommended and at last when the works in unheated room.
Is it a usual thing for my water heater to have moisture on the top of the tank?
Presence of moisture or dampness at the top of your equipment or on the floor adjacent to your water heater is a signal that it is defective and thus it is not normal for moisture presence at the top of your tank.
Between a gas and electric water heater which is better.
The difference in the comparison between these two comes in terms of energy consumption whereby natural gas water heaters consume almost half the energy a propane or an electric water heater does. In the lack of gas a heat pump water heater can be used. These electric water heaters despite being the latest types to be introduced in our markets they consume 40 percent less energy than standard electric water heaters.