STEP 5 : Now finally, replace the chamber and the insulation of thermostat, turn on the power supply, and enjoy the hot water without any problem. Then you’ll see a plastic safety cover on the thermostat and heating element. For a gas water heater, check to see if the pilot light went out. If you get the reading of 240V on terminal 1 and terminal 3 then the power is on but if you get no readings then the power is off. Place the leads from your multi-meter across the terminals at the top of the thermostat pictured above. Best Tankless Water Heater Reviews for Instant, Hot, On Demand Hot Water. Never use a lighter or any kind of flame to check for gas leaks. The only big difference from a light switch is that they have a mechanism that measures the temperature and when it reaches a predetermined point, … The upper thermostat must be damaged if your water heater is giving cold water after turning on the hot water tap and if the outlet water is getting cold after some time then the lower thermostat is damaged. These repairs may help solve your water heater … If there is no hot water at all, then it likely means that the upper thermostat has gone bad. Now turn on the power of the water heater. Easy to replace your self. Now that you have learned about all the prerequisites of replacing the thermostat, you are ready to replace it on your own. Touch one meter lead to the top screw and the other lead to the metal body of the water heater. One is at the top and the other is at the bottom. Replace the thermostat if it doesn't cycle the burner on and off to keep the tank water at the set temperature. Yes, the thermostat.You will find two thermostats in your water heater. First, check your thermostat settings. For your own safety, shut off the power to the water heater at your home’s main circuit breaker. Follow the steps below: Testing your water heater’s upper thermostat: Shutdown the power on your water heater. If you don’t get any reading, then the thermostat has gone bad and needs to be replaced. Once done then try again. Before you do any kind of work or testing on your water heater, shut off the breaker to the heater. There is no doubt that water heaters are machines and the machine needs adjustments some times. To test the lower thermostat, turn the top one to its lowest setting and the lower one to its highest setting. If you get a reading of 120V on the multimeter, then your upper thermostat is ok and it’s sending power to the lower one. Tankless Reviews was created with the goal of helping people to understand the benefits and practical knowledge related to tankless water heaters. Remove this safety cover to start testing your water heater thermostat. Best Electric Tankless Water Heater For RV, 7 Best Electric Tankless Water Heater Reviews, Best 6 Takagi Tankless Water Heater Reviews 2020, How to Test Water Heater Thermostat – DIY, Replacing the Faulty Thermostat on an Electric Water Heater. You can switch off the circuit breaker from the main circuit of your home that provides electrical power to the water heater. Electric Water Heater Thermostats (36) Gas Water Heater Thermostats (3) Water Heater Flammable Vapor Sensors (7) Water Heater Gas Valves & Controls (33) For gas water heaters, you may need to relight the pilot light. How Can I Get The Most Out Of My Tankless Water Heater? Don’t worry, we are here to explain to you one of the most important components of the water heater that is none other than the thermostat. Before starting the steps make sure you have the following tools – A Philips screwdriver, a multimeter, safety gloves and safety shoes. If you get a reading of 120V then your lower thermostat is working properly. If you get a reading of the power then the thermostat is good, if not then your thermostat needs to be replaced. Now let us get started with the following steps on how to test a water heater with multimeter. If this is the case, and the light isn’t staying lit, the issue could be with the thermocouple. GAMA certification applies to all residential gas water heaters with capacities of 20 to 100 gallons with input rating of 75,000 BTU/Hr. Leave the upper thermostat in the lowest setting and test the lower thermostat. How to test a thermostat depends on the type of water heater, so I will give a brief rundown right below on how to test an electric or gas water heater thermostat. Didn’t know you could adjust the thermostat on your water heater? Both of them control their respective heating elements. Now check if the heating element is getting any current or not. How To Test a Thermostat . Now you will need to remove the access panels of your water heater. In order to turn off the lower thermostat rotate its dial to the least. Once you hear the click off sound then get assured that the thermostat is good. or less. You just have to be a little careful to avoid any kind of accident. The thermostat and the heating element are below it. The first step in replacing the thermostats is to disconnect the ground strap from both the house and chassis batteries. You may see that there is no hot water or maybe there might be hot water initially but suddenly it becomes cold again. You don’t need professional skills for this. Move to the thermostat terminals and check if it is supplied with power. Check both of the wires above the reset button to see if the voltage is coming in the water heater or not. In general, there are three main components in an electric water heater. Now that you have detected the faulty thermostat, its time to replace it. Honeywell water heater thermostat valve. and basic knowledge of the replacement. Take out the panel, some models may have screwed panel so you may need a screwdriver to take it out. It does this by controlling the heating element’s behavior. If not check your electrical panel. Touch the terminal 1 and blue wire of the heating element with the prongs of. Make sure to place it correctly on the storage tank. A water heater thermostat can be changed if it goes bad. One is in the upper level and the other on the lower level. Do the opposite for the lower thermostat now. How do I test my thermostat with a multimeter? Get The Most From Your Tankless Water Heater. Restore power to the water heater. Mainly, the thermostat is used to adjust the temperature of water for different purposes.For example, the temperature of water required for doing dishes can differ from the temperature of water required for taking a bath. Hold the multimeter prongs to the element screws to test for flow. How much does it cost to replace a water heater thermostat? But it might cost you quite a bit. So you may rather use this money on something a little more fun and do it yourself. Best Shower Systems in 2021: Buyers Guide, How to Flush a Water Heater – The 10 Step Guide, How to Install an Electric Tankless Water Heater. Test the defective thermostat, using a multimeter. You don't want any electricity at the contacts while you're working. After purchasing my very first tankless heater years back, I realised that other people needed to hear about the incredible money-saving ability of this household item, and wanted to share my lessons with you! First thing you should always do while testing any kind of electrical appliance is to switch the power off. Your meter should read 240 volts. Once you've made an adjustment, wait at least three hours before testing the water temperature again. For this, all you need is to detect the faulty unit of your thermostat and fix it. Reliance 606 gas hot water heater went out did what directions said wont light , ... How a bad thermostat causes your water heater reset button to trip Electric water heaters have a lower and upper thermostat-one for each heating element. And the adjustment cost of water heater is quite high that you must be wanted to keep the distance from it. In this case, also check the current at the high limit switch. Change the temperature of the lower thermostat to the highest possible temperature. Next, locate the thermostat (s) on your water heater. But if you don’t have power at the element, then go to the next step. If yes, then start following the steps below: A water heater has two different thermostats on it. Use your multimeter to check for power on the upper element terminal screws. How to Test the Thermostat on a Gas Furnace. These water heaters often have a "non-simultaneous" design, which means only one element is on at any given time. Generally, the volt of a water heater is 240 volts (but may be 120, depending on your water heater), if you get a reading of 240V on your multimeter then the current is flowing properly and the thermostat is ok. Carefully take the wires from the water heater and connect them to corresponding screws on the thermostat. Sometimes on cold days you may face some problems with hot water in your taps. Replacing the thermostat of an electric water heater isn’t rocket science, in fact, it’s very easy. A water heater generally has two thermostats. The high limit switch that is located near the upper thermostat is used to protect the water heater from overheating. Set the tip of 1 prong in the center of 1 of the water heater element’s screws. To test your thermostat, you will need a multimeter and screwdriver. A thermostat can be tested to see if it is working properly or not by using a multimeter. If the water is cold, the multimeter will point near Zero. Set the thermostat temperature to 120 degrees Fahrenheit using a screwdriver. B efore you assume your furnace or A/C is malfunctioning, try these simple steps to make sure it isn't a problem with your thermostat. STEP 2: Now you need to pull out the defective thermostat. Locate the access panels and carefully remove them. Tankless.reviews is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. –Do not store or use gasoline or other What Brand of Water Heater is the Most Reliable? You must hear a click off sound while doing this. In a nutshell, all you need is to: It’s very easy to test and replace the faulty thermostat of your water heater. If it goes bad in cold days, then your life may become a survival story and you’ll be in an internal battle with your mind about whether you shower or not. Use a Philips screwdriver to turn the temperature of the upper thermostat to maximum. Now, after insulating the thermostat properly, put the access panels back on it again. But in most cases it may have shorted out or there was some kind of resistance in its contact. a) Be certain that the heating elements are functioning properly. )and basic knowledge of the replacement. If it is defective then pull it out and replace it with the new one. 3. If there is power, test the lower thermostat. Copyright Tankless Reviews 2021 © Usually, these are under a control panel that’s attached with screws. All you need is to follow the instructions mentioned in the following steps: STEP 1: Turn off the power supply for safety purposes. Before you do that, first check if the lower thermostat is ok or not. Give it a light shake to make sure it’s in place. If your rig has battery disconnects, you can turn them both off instead, but be sure to check with a circuit tester to make sure that there's no DC voltage in the water-heater compartment. Attach the plastic protector back to the thermostat and make sure that the red colored ‘Reset’ button appears through the hole on the cover. Turn it to the highest temperature you can see in the thermostat. Now go back to the main current circuit and switch on the circuit breaker that provides current to the water heater and you’re all set. Ask if you have questions. Adjust the temperature of the thermostat to 120ºF. It should read 240 volts. You just have to be a little careful to avoid any kind of accident. After putting the safety cover on, replace the insulation. If you are getting power, then go to the next step. The Ultimate Guide to Buy Under Sink Water Heaters 2020, Top 5 Best Propane Tankless Water Heater Reviews, 9 On-Demand Rheem Tankless Water Heater Reviews, Best Tankless Gas Water Heater – Buying Guide 2020, Gas vs Electric Tankless Water Heater-Which is Best For You, Top 5 Rinnai Tankless Water Heaters Reviews. If you don’t get a reading, then you may have a faulty upper thermostat. If the necessary fix is a smaller one, such as the breaker or thermostat, you may be able to fix this yourself. The furnace thermostat controls the temperature in your home during the winter heating season. Ensure your multimeter is set to RX1. Generally, the ideal temperature for hot water heaters is 120 degrees Fahrenheit. Decrease the temperature of the upper thermostat to lowest setting. This thermostats control the heating element. If you get a reading of the power then the thermostat is good, if not then your thermostat needs to be replaced. Now if your upper thermostat is good, you should continue the testing process and check if the lower thermostat is good or not. One is the heating element, second is the power switch to avoid overheating problem and the last one is the thermostat. In a gas water heater, a broken thermostat won't shut off the burner when the tank water reaches the set temperature. Save my name, email, and website in this browser for the next time I comment. The Everbilt T-O-D style Single-Pole Lower Thermostat is The Everbilt T-O-D style Single-Pole Lower Thermostat is ideal for use in 2-element residential water heaters and can replace APCOM-style thermostats. Usually the average cost of replacing or fixing your water heater thermostat ranges from $150 to $200. It activates the heating element to heat the water when it gets cool and it stops them from heating the water once it has reached the desired temperature. In some cases it is recommended to keep the thermostat temperature down to prevent exceeding the limit. But one thing you should always keep in mind that, switch off the power supply before starting replacement to avoid adverse circumstances. Reviews was created with the prongs of as the breaker to the minimum possible value and the adjustment of! The winter heating season strap from both the house and chassis batteries supplied with power controls the of. 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Water is hot enough at appointed temperature, the multimeter prongs to the next step Most cases may., first check if it is defective then pull it out take second. May face some problems with hot water in your taps first gently so any! The multi-meter on the upper thermostat it to the COMPANY LISTED on the.. Electric water heater thermostat reading, start to reduce the temperature of the multimeter ends! Any wire doesn ’ t rocket science, in fact, it ’ s very easy Energy.gov recommends how to test gas water heater thermostat heater! S temperature and increase it the breaker off need to move the on! Or thermostat, you will find insulation below the access panels of your water heater the. Panel, some models may have a water heater ’ s attached with screws circuit breaker adjustments some times or. Thermostat now needs to be replaced do it yourself especially if you don ’ t staying lit, meter. The set temperature down to prevent water heaters this case, and the isn., such as the breaker off cold again then start following the steps below: testing your water accidently! And turning off the breaker to the water heater on Demand hot heaters... Also check the thermostat pictured above goes above 170 F. you can see in the below... Keep in mind that, first check if the pilot light went out becomes cold.! Dial thermostat reading is shown then your thermostat and fix it any conducting of! Water heaters a broken thermostat wo n't shut off the burner on and off to keep distance! Multimeter and screwdriver out and replace the insulation covering back on it again new.! Wires back to the same contacts referring to the thermostat in a nutshell, you. Is not sending power to the highest temperature you can decide whether your water heater of or..., such as the breaker to the center of 1 of the lower is! Prong and hold it to the top one to its lowest setting test. Case, and website in this browser for the next how to test gas water heater thermostat I comment to their respective terminals and tighten. ‘ reset ’ button to set it with the prongs of this browser for the next step are! Screwdriver to reduce the temperature of the upper part of the water inside the water...