Why is my pilot light going out? I relight it and a day or two later it is out again.

Do you have a sealed combustion chamber?

How old of a heater do you have? Was there one door or two (double door) covering the area of the pilot and thermocouple? How close is this pilot to a door or window?

If you would give us the brand of your heater it would help us decide what might be wrong with the pilot. Also if you will give us the model number and the serial nember that would help also.

The water heater is about 10 years old. It is in a closet in the garage on an exterior wall. THe closet has a vented door and there is a vent to the exterior wall. It has just recently experienced this problem, as this set up has always worked. THe water heater is a US Craftmaster Model G1H5035T3NV Product #0720240. Thanks

Do you have a sealed combustion chamber?

I'm not sure I know what the combustion chamber is. I know I can see the pilot and the burners.

If you would give us the brand of your heater it would help us decide what might be wrong with the pilot. Also if you will give us the model number and the serial nember that would help also.

US Craftmaster Water Heater
Model # G1H5035T3NV
Product # 0720240

First make sure the heater has oxygen : make sure the vents are not covered with dust and dirt. Then, the cheapest to start with would be to replace Thermocoupling. Do so and come back for more if it didn't help...

If the pilot light will light but does not stay lit when the gas valve control is released the problem could be a defective thermocouple or perhaps a loose thermocouple connection to the gas control valve. Make sure the thermocouple connection to the control valve is tigh.

Also see the images below will show you the combustion chamber , Thanks.

John

First make sure the heater has oxygen : make sure the vents are not covered with dust and dirt. Then, the cheapest to start with would be to replace Thermocoupling. Do so and come back for more if it didn't help...

I replaced the thermocouple but I'm experiencing the same problem. The pilot will light, the burner will ignite and heat the water, but at some point the pitol goes out.

How old is the heater ? What does it look like visually ? Any rust inside ? Is the pilot flame blue or yellow ?

I s there any chance you are getting a down draft? Are the doors closed to the combustion chamber?

Try adjusting the flame of the pilot light up a little. The adjustment is on the gas valve. Make sure that the thermocouple is in the flame.

How old is the heater ? What does it look like visually ? Any rust inside ? Is the pilot flame blue or yellow ?

It's about 10 years old. It's in pretty good shape. The pilot light is blue.

I know that you probably have checked everything but there is something that you or the rest of us just have not come up with.

So look at the burner after it has been burning for a while and see it the little flames are blue and from 1/2 to 3/4 inch tall, make sure that they do not flutterand try to come down from the burner.

Next with just the pilot burning have someone open and shut the doors to the room that the heater is in, see if it maks the pilot pull away from the thermocouple. Of course the pilot should be up in the flame of the pilot.

Do you ever run out of hot water when the heater is opperating properaly? The reason I ask this is any time that your water is full of cold water and the burner comes on the tank begins to sweat, this causes water droplets to form and drop down on and around the burner, it is possible that a drop of water is hitting the thermocouple and making the gas valve close.

Where the thermocouple screws into the gas valve is called a maginatic valve and when thermostat is hot and you mash the red button down a magnet holds a plunger down inside, if the heat is lost the bi-metal magnet loses its power and the valve closes. These magnetic valves go bad but not very often.