85805410012702 Genuine 50 Degree Normally Open Thermal Cut-Out for Electrolux Group Ovens and Cookers, N.O. Thermal Switch

Part 85805410012702 is a genuine Electrolux thermal cut-out rated at 50 degrees, with normally open contacts. It comes from the Electrolux group cooking range and responds at a far lower temperature than a typical oven safety cut-out, so it suits circuits that need to react as soon as things start to warm. Make sure the rating and contact type stamped on your old switch match before ordering.

Signs a low temperature thermal switch has failed

Most thermal switches of this kind use a bimetal disc that flips when its mounting surface reaches the set point, here 50 degrees, changing the state of the contacts. Over many cycles the disc can weaken and the contacts can pit, so the switch may stop responding, react at the wrong temperature, or chatter on and off. The symptom depends on what it controls. A fan or indicator might never come on, or might run constantly. A multimeter check across the terminals, cool and then warm, shows whether it still switches.

Part details

• Genuine Electrolux part 85805410012702
• Thermal cut-out rated 50 degrees
• Normally open (N.O.) contacts
• From the Electrolux group cooking range, no models on file

Replacing the 50 degree switch

Turn power off at the switchboard before opening any panel, and have a licensed electrician handle hard-wired appliances. Photograph the leads, remove the old switch from its bracket and clean the mounting face so the new one makes full contact. Refit any insulation or heat shields exactly as they were, then test the circuit it controls.

Questions about this part

How can I test the old switch?

With power off and the switch cool, a multimeter across its terminals should show open circuit, since it's normally open. Warm it gently past 50 degrees and it should close. If it never changes state, it has failed.