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This isn’t a how to fix it question, but is a how does it work question?!
Can someone explain the workings of a thermo coupler device as found on a gas hob? – obviously detects heat and if present keeps gas flow on, how does it work though?
TIA
Re: How does a hob thermocoupler work?
Basically, it’s filled with gas and when it heats the gas expands. This in turn causes a pressure at the valve end where it’s connected and holds the gas valve open. Heat goes, thermocouple cools and the gas shuts off.
Dead simple really. 😉
K.
Re: How does a hob thermocoupler work?
Hi
Erm..
The flame touches the thermocouple which the heat produces a small current which then travels down to the electro magnet valve at the gas tap,The small current is enough to hold out the magnetic valve thus allowing the gas to continue through the valve.
Once the thermocouple cools there is no electrical current holding open the electomagnetic valve thus turning the gas off.Bryan
Re: How does a hob thermocoupler work?
The one in my central heating boiler works exactly as kwatt describes. 🙂
Jim.
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