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How do you reset a thermostat on a gas hot water heater?

Posted on August 29, 2022 by Author

How do you reset a thermostat on a gas hot water heater?

A water heater reset button, usually red, is located in the center of the limit switch just above the water heater thermostat. The water heater limit switch is a safety device that will shut the power down to the water heater if something malfunctions and the water gets to hot.

Should I remove the plastic sleeve from gas water heater control valve temperature sensor?

DO NOT remove the protective plastic sleeve from the copper sensing tube. DO NOT use a pipe wrench on the control body. Recommended method to tighten the thermostat is to screw a short (8”-10”) piece of correctly sized pipe into the INLET boss and use this pipe as a handle.

How does the thermostat work on a gas water heater?

The thermostat is a thermistor that responds to heat by producing a small electric current. The current increases when water temperature increases, and drops when temperature drops. Changes in the electric current cause gas control to turn ON and OFF. When gas control turns ON, it releases gas to burner.

How do I know if my gas control valve is bad?

If the burner stays on, turn the gas supply off and replace the gas valve. If the pilot is lit, you have a tank of cold water, the thermostat turned up and the burner does not fire up, either the burner orifice is clogged or the water heater gas valve is bad.

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How do you test a gas control valve?

How to Check the Furnace Gas Valve With a Multimeter

  1. Turn off the furnace at the wall control.
  2. Take out the bolts in the service panel on the side of the furnace using a nut driver.
  3. Pull the wires off the gas valve terminals.
  4. Turn the test control on the multimeter to “mV,” which stands for millivolt.

How do I know if my gas valve is bad on my water heater?

How do you test a gas control valve on a water heater?

To check the pilot control, follow the lighting instruction on the water heater. Do not try to light the pilot if you smell gas. Press the pilot button down and light the pilot. If the pilot lit but will not stay lit when the pilot button is released the water heater thermocouple could be the problem.

How much does a gas control valve cost?

Replacing a water heater gas control valve costs $150 to $600. The valve controls the flow of gas to the unit, allowing the pilot light to ignite and releasing gas to the burner to heat the water in the tank. The gas control valve contains the thermostat and pilot light controls.

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How long do gas valves last?

Gas Valves are routinely checked for 100,000 cycles and are used in equipment that have approximately 15 years life expectancy.

What causes a gas valve to go bad?

The valve itself may have simply worn out or may be damaged due to basement seepage or submersion. Alternately, one of the electronic gas ignition components or a glitch in the safety circuit may be to blame. If your furnace has a standing pilot light, the thermocouple could be worn out.

What do you need to know about replacing your water heater’s control valve?

Here’s what you need to know about replacing your water heater’s gas control valve. The gas inlet connects to the gas control valve, which then, as the name implies, controls the flow of gas to the unit. The gas control valve allows the pilot to be ignited, and the lit pilot heats the thermocouple.

What do the numbers on a water heater mean?

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But, all water heaters have a Rating Plate that lists important data such as the model and serial numbers, manufacturing company’s name, length of warranty, wattage of elements installed (on electric models), gallon capacity, input BTU rating (gas models), and more. CONTACT US FOR YOUR FREE QUOTE!

What does the gas valve do on a hot water heater?

See the article ‘ Gas Hot Water Heater Troubleshooting ‘, if you are unsure of your problem. The gas valve sends gas to both the pilot light and the main burner. It senses electrical current from the thermocouple and shuts off the gas if the pilot is not lit. This is an important safety feature.

What is the model number of a 21v50 2 water heater?

Other manufacturers use different formats, but in a similar fashion. Let’s decode the above rating plate: This is water heater model number 21V50-2, serial number 1291A39968, manufactured in December of 1991, 50 gallons, 36000 BTU’s per hour, and is set to work with natural gas only.

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