8588612 Genuine Bromic Universal Thermocouple 1200mm, Gas Flame Failure Safety Thermocouple for Gas Appliances

Bromic 8588612 is a universal style thermocouple with a 1200mm length, used as the flame failure sensor on gas appliances. It's a genuine Bromic part rather than one made for a single brand of appliance. Length is the detail that catches people out, so measure the old thermocouple from tip to valve nut before ordering, because a 1200mm unit can't stretch to suit a job that needs 1500mm.

What a thermocouple does in a gas appliance

A thermocouple is the safety device that keeps the gas flowing only while there's a flame. Its tip sits in the pilot or burner flame and produces a tiny voltage when hot, which holds the gas valve open. If the flame goes out, the voltage drops and the valve shuts. When a thermocouple fails, the classic sign is a pilot or burner that lights while you hold the knob in, then dies as soon as you let go. A loose valve connection or a dirty tip can cause the same fault.

Part details

• Genuine Bromic part 8588612
• Universal style thermocouple
• Length 1200mm
• Flame failure sensor for gas appliances

Before fitting a thermocouple

Replacing a thermocouple counts as gas work, which in Australia means a licensed gas fitter. Turn off the gas supply and let the appliance cool. Check that the connection at the gas valve end suits your valve and that the 1200mm length reaches without kinks or sharp bends. Tighten the valve nut firmly but gently, then test that the flame holds once the knob is released.

Questions about this part

How do I know what length thermocouple I need?

Measure the old one along its full length, from the tip at the flame to the nut at the gas valve, and order the length that matches or is slightly longer. A thermocouple that's too short can't be stretched, so this 1200mm version won't suit an appliance that needs 1500mm.