No, that is part of the function of the pilot light. To light the burner and to keep the gas valve open. The thermocouple sits in the flame of the pilot and produces a small electrical current that keep the gas valve open. When the tank cools down, the thermostat opens the valve to the burner so that it can light. When the pilot goes out, it is usually the thermocouple that is bad.
The output of the thermocouple is linear.
Yes, thermocouple is used in fridges !
Control valves do go bad, but not that often. The tip of the thermocouple is in the flame? Holding the pilot button down long enough for it to heat? Sometimes the first time you light it, it takes a little longer for the thermocouple to work. Good clean connection on the valve end of the thermocouple? That's all I can come up with at the moment.
To create a thermocouple one needs thermocouple wire, a means of spot welding the wire, and wire strippers. A thermocouple is used to measure temperature.
The thermocouple keeps a gas pilot light burning.
is a thermocouple an active or passive transducer?-why?
You should not paint a thermocouple.
Defective thermocouple or possibly a dirty or clogged pilot orifice.
not much, but it will depend on the type of thermocouple
Yes, it's an active transducer. A thermocouple is passive not active
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.