140054234012 Genuine Oven Burner Thermocouple for Chef, Westinghouse Gas Ovens CFG503WBNG CFG517WANG WLG503WANG WLG517WALP GUK527WNG WFG617SANG

If the gas oven lights but goes out as soon as you let go of the knob, the thermocouple is the usual suspect. 140054234012 is the genuine oven burner thermocouple for Chef and Westinghouse gas cookers, also listed as 0541001947, 0541001937 and A05423401. Models on file include Chef CFG503, CFG504 and CFG517, Westinghouse WLG503, WLG505 and WLG517, and the GUK, GEK and GBC ranges in both natural gas and LPG versions.

Gas oven won't stay lit

The thermocouple is a flame failure safety device. Its tip sits in the oven burner flame, and the heat generates a small voltage that holds the gas valve open. If the flame goes out, the voltage drops and the valve shuts off the gas. When the thermocouple wears out, or its tip is bent away from the flame, the burner lights while you hold the knob in but drops out once you release it. A burner that cuts out partway through cooking can point to the same fault.

Part details

• Genuine part 140054234012
• Also listed as 0541001947, 0541001937, A05423401 and 85805410019475
• Flame failure thermocouple for the oven burner
• Suits Chef and Westinghouse gas ovens and cookers, NG and LPG models

Fitting a gas oven thermocouple

This is a gas safety component, so a licensed gas fitter needs to install it. Turn off the gas supply and power to the cooker first. The fitter will position the tip correctly in the flame, tighten the connection at the gas valve without overdoing it, and test that the flame failure system shuts the gas off when the burner goes out.

Questions about this part

Does it suit both natural gas and LPG ovens?

The models on file include both versions, such as CFG517WANG for natural gas and CFG517WALP for LPG. The same thermocouple is listed for both, but always check your exact model against the list for 140054234012.