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Suspected Faulty Heater On Bosch Maxx Lifestyle (Wae26470Au)

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Hi All,

I think I have a faulty heating element (or associated relay) on my Bosch Maxx Lifestyle (WAE26470AU).

If I disconnect a specific wire on the back of the control panel the cycle seems to proceed normally, but if I leave it connected it cuts out the 240v mains circuit to which it is connected with an RCD fault half a second after the motor engages. It doesn't happen on a cold wash. Can anyone take a look at the pics (with the disconnected wire highlighted) and confirm my theory?

Here's a link to the pics (link) with a description below:

  1. Front panel. Shows control panel on right hand side of detergent bays
  2. Shows the back side of the control panel from inside the washer. Orange oval highlights area of focus for picture 3.
  3. Shows the back of the control panel with the black connector (highlighted in orange) disconnected from its socket (highlighted in red). RCD faults no longer occur when this wire is disconnected.
  4. Shows the information placard on the rear of the unit

Further to that, I have examined this video on how to replace the element (link) is there a specific test I can do without taking the front of the machine off to make sure I am going to order the right part(s)? I have found the element online (link), does anyone know the Bosch part number?

Kindest regards,


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  • Root Admin

That heater is £56.90 including delivery on the link you posted for Ransom Spares

Disconnecting the wires isn't a reliable way of testing anything and any different behaviour with wires disconnected doesn't usually prove anything one way or the other. The only way to check the heater is to test it with a meter as described in my article. Check out my article here - Washing machine not heating up the water

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