gas fire i ignite and flame is there hold button 30 secs and flame just goes out anyone explain whats wrong?

Answer 1

a thermocouple uses the heat from the flame to generate a very small amount of electric current.when you push the valve in it presses against a magnet and that holds the valve open due to the electric current.when the flame goes out or the t/coulpe burns out it wont stay open because the magnet is spring loaded and pushes the valve shut.the magunit can also go faulty and will give you the same problem.

Answer 2

When you light the pilot while pushing the button you are producing heat on the thermocouple. It has dis similar metals(copper and nickle) When heated these two make electricity!
The electrical current produced hold down the spring loaded electro magnet you are pushing on. If all is well the power from the thermocouple will hold open the pilot gas and allow for normal operation of the heater with a nice safety feature! If the flame goes out while the heater is in operation and it gets cold in the house,when the thermostat calls for heat, nothing but nasty raw gas would come out causing asphyxiation and death. But thanks to the safety magnet if the flame goes out ,the magnet releases and the gas gets shut down. You could simply be not allowing the thermocouple to get hot enough, or the thermocouple may be bad, or the pilot may be dirty and flame not enough to hold the magnet. The cheapest thing to replace is the thermocouple. Start there.

Answer 3

if you're dealing w/ a gas hot water tank, the thermocoupling is probably bad. Replace it. Can get a new 1 @ any hardware store, just make sure it's the proper length. The thermocoupling is the small metal piece ( about size of a pencil, just shorter ) that the flame on the pilot light burns past. This is a safety feature, so that gas doesn't keep coming out of control valve when pilot light ( flame ) isn't present. Thermocoupling detects heat & keeps gas control valve open. You also have to make sure after the 30 seconds that you turn the knob from pilot to the on position. Hope this explains & helps you w/ your problem.

Answer 4

There are a few possibles, start at the beginning rather than the middle, is the pilot flame strong, and enveloping the thermocoupling (little stick thing should be in the flame), if not it is a partially blocked pilot, if it is ok, then could be the thermocoupling/oxypilot, and if thet is ok, it could be the gas tap, or a blockage in the pipework, any way up, you have to be corgi registered to sort it out, best advice is call an engineer.

Answer 5

probably the thermocouple. It is a metal rod over the flame with a wire attached to it.

Answer 6

There is a safety sensor to make sure fire is burning and not gassing the room
If this sensor fails or gets covered in carbon - for safety reasons gas supply is cut automatically.

Answer 7

Bad thermocouple, it senses the heat (while you are holding the button) and opens the gas valve, but it is not opening the gas vavle, replace it

Answer 8

your thermo coupling is probably bad/or durty (needs to be sanded) or your gas valve is bad. The thermo coupling tells your gas valve that "YES" the pilot is lit and is burning safely. if it is dirty it cannot tell that the flame is burning and tells the gas valve to shut off the gas because it thinks the pilot light gas is just spewing out into your furnace unlit.

Answer 9

might be a dodgy ignition switch, try holding down 4 a little longer, or it maybe the gas pipe.

Answer 10

The "thermocouple" sounds as if it's gone bad. Furnaces and stoves have these.