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Q: How do you change a thermocouple on a unitrol valve water heater?
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How do you change out a Unitrol gas control valve on a hot water heater?

By shutting off the gas supply draining down the tank removing all the connections


What does a thermocouple on a gas heater operate?

The thermocouple proves to the system that the pilot light is lit and the gas valve can safely open.


Hot water heater pilot wont light?

THERMOCOUPLE or defective gas valve


What if you changed the gas control valve and the electronic ignition on the water heater and the pilot still goes out after awhile?

The thermocouple is usually the first thing to change. It controls the valve and the spark ignition is just to light the pilot.


How do you replace thermocouple on Sears hot water heater?

Depends on the age of the heater. If you light the pilot with a match, you should be able to remove the thermocouple with the burner in place. The end that is in the flame will pull out of the clip that holds it. The control valve end unscrews. If you have a newer one that lights the pilot with a sparker, you have to remove the burner as a unit. There should be two screws holding the cover plate in place, the gas line to the burner, the thermocouple and the wire for the sparker. Disconnect all of these from the control valve and the unit slides out through the hole. Then change the thermocouple and replace.


Why does your Richmond water heater pilot turn off?

It is most likely the thermocouple that is bad. That is what keeps the pilot light on. The thermocouple is the small tube that sits in the flame of the pilot and runs to the control valve.


How do you operate water heater is it gas or electirc or both?

It is one or the other. The thermocouple on a gas heater generates a very small current that keeps the gas valve open. A few micro volts. The thermocouple is the small tube that sits in the flame of the pilot light.


How do you change the heater control valve on a 1995 Toyota corolla?

Remove the heater control valve and replace it.


How do you replace a thermocouple on a hot water heater?

The thermocouple is the small tube that runs between the pilot light and the control valve. The valve end unscrews and the pilot light end in held in place with a spring clip that the tip pushes through. Unscrew the valve end and work the pilot end out by twisting it and pulling it out of the clip. Install a new one making sure the end is in the pilot flame and light the heater. No gas will come out when you take it loose from the control valve.


What does it mean when the water heater wont say lit?

Most likely the thermocouple is bad. The thermocouple is the little tube that sits in the flame of the pilot light. Runs from the pilot light to the control valve. Very simple to replace. Costs about $6.


Why does your gas water heater flame go out as soon as it lights. My pilot stays lit. Is this a bad T-Stat or gas valve?

sounds like you have a bad thermocouple. The thermocouple senses the pilot flame and produces voltage to tell main flame to light. Thermocouple can be bought at any hardware store.


Your hot water heaters pilot light is on but the heater wont come on?

The thermocouple is bad. The thermocouple is the small metal tube that sits in the pilot light flame and runs to the control valve. The thermocouple generates a very small electrical current that keeps the gas valve open. They go bad regularly. **** I would have to say to check to make sure the valve is not in the "Pilot" position. If it is then turn it to the "On' position. If it still isn't working then you may have a bad Gas Control Valve. If the thermocouple was bad the pilot light would not stay lit. If the pilot light stay lit, it is doing what it is supossed to do.