85805340017052 Genuine Infinite Switch MPA-101 Energy Regulator for Electrolux Group Cooktops and Cookers, Also 0534001705

Part 85805340017052 is a genuine Electrolux infinite switch, type MPA-101, also known by the number 0534001705. An infinite switch, or energy regulator, controls the heat of an electric hotplate or element by cycling the power on and off. It can be used in place of the older T3A-201 switch, but the terminal layout is different, so the connections have to be converted rather than copied across.

Electric hotplate stuck on high or not heating

Inside an infinite switch, a bimetal strip heats and cools to open and close the contacts. The higher the setting, the longer the power stays on in each cycle. When the contacts weld together the hotplate runs flat out on every setting, and when they burn open the plate won't heat at all. Worn switches can also cause erratic heat, a pilot light that stays off, or a buzzing or crackling noise from behind the control panel. Scorch marks on the terminals, or a knob that turns without its usual feel, are further clues.

Part details

• Genuine Electrolux part 85805340017052
• Also listed as 0534001705
• Infinite switch type MPA-101 with pilot terminal
• Replaces a T3A-201 with rewiring

Fitting the MPA-101 in place of a T3A-201

Isolate the cooktop or cooker at the switchboard first. This is hard-wired mains equipment, so a licensed electrician needs to fit the switch. When it replaces a T3A-201, each lead must be moved to the matching phase, pilot, load or neutral terminal on the MPA-101, as the layouts differ. Label every wire before removal and test all settings afterwards.

Questions about this part

Can the MPA-101 replace my T3A-201 switch?

Yes, it's used as a replacement for the T3A-201, but the terminals are arranged differently. A licensed electrician needs to rewire the connections to suit the MPA-101 rather than copying the old layout terminal for terminal.