0290023 Genuine Bifilar Thermocouple 510mm for Blanco Gas Cooktops, Blanco Twin Wire Flame Failure Thermocouple

Genuine Blanco thermocouple 0290023 is a bifilar type with a 510mm lead, made for Blanco gas appliances. Bifilar means the lead carries two separate wires instead of the usual single core and outer sheath, so it isn't interchangeable with a standard thermocouple. Check your old thermocouple for the 0290023 number, a twin wire lead and the 510mm length before you order.

When to replace a Blanco bifilar thermocouple

Like any thermocouple, this probe heats in the burner flame and produces a small voltage that holds the gas safety valve open. If the flame goes out, the voltage collapses and the valve closes. After years in the flame the tip deteriorates and its output drops. The usual sign is a burner that won't stay alight once the knob is released, or one that goes out by itself on low. Damaged insulation on the twin wires can also cause intermittent dropouts, so inspect the full length of the lead.

Part details

• Genuine Blanco part 0290023
• Bifilar (twin wire) thermocouple
• 510mm length
• Gas safety part for licensed gas fitter installation

Fitting a bifilar thermocouple

Book a licensed gas fitter, as Australian rules require gas work to be done by one. Isolate the gas and switch the appliance off at the wall first. Take note of how both conductors of the old lead connect, as a bifilar lead terminates differently from a standard one. Mount the tip in the same position at the burner, route the lead away from heat and test the burner shuts off correctly.

Questions about this part

Can I use a standard thermocouple instead?

No. This is a bifilar thermocouple, with a different lead and connection from a standard single core type. Replace it with the same type and length. If your old thermocouple is marked 0290023 or measures 510mm with a twin wire lead, this is the match.