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Heat Pump Fault Finder AU

Verified codeset result

The manufacturer documentation publishes fault code 64 for the WWK service and fault-code display, mapped to the affected Stiebel Eltron models listed below.

Fault code 64

Stiebel Eltron WWK service and fault-code display: 64

WWK service and fault-code display

Stiebel Eltron logo (for identification)

Last verified from the captured official source review.

64 meaning for this display codeset

This page isolates Stiebel Eltron fault code 64 for the WWK service and fault-code display. It does not combine the Stiebel Eltron 64 meaning with another controller or codeset.

Before applying the Stiebel Eltron 64 meaning, confirm the affected model uses the WWK service and fault-code display. In that controller namespace, 64 means documented as the defrost temperature not being reached within the maximum defrost time.

The STIEBEL ELTRON WWK 222/302 Operation and Installation Manual source anchor on page 15 supports this Stiebel Eltron 64 record for the WWK service and fault-code display.

The permanent source key stiebel-eltron-wwk-222-302-display 64 keeps the stiebel-eltron-wwk-222-302-display 64 controller/code pairing distinct in publication.

What the documentation says

Documented as the defrost temperature not being reached within the maximum defrost time.

This is a paraphrase of the manufacturer’s documentation. A licensed technician confirms the actual cause.

Severity

Amber — service attention

Amber means the fault needs attention; contact the manufacturer or a licensed technician if it persists.

Source-grounded diagnosis context

Documented causes

Repair, replacement and warranty context

Start with diagnosis, then compare repair and replacement

An amber classification usually calls for a diagnosis and repair quote, not automatic replacement. Compare parts availability, repair cost and system age only after the fault has been confirmed by an appropriately licensed professional.

This brand has a verified current Australian support route, so check warranty coverage with the manufacturer before authorising paid repair or replacement work.

Affected models

Every model mapped to this codeset is listed with the evidence match state used by this site.

  • Stiebel EltronWWK222
    Exact manual match
  • Stiebel EltronWWK222H
    Exact manual match
  • Stiebel EltronWWK302
    Exact manual match
  • Stiebel EltronWWK302H
    Exact manual match

Related codes from this codeset

These codes appear in the same documented controller or display codeset.

  • 4

    Documented as a faulty integral sensor.

  • 512

    Documented as a refrigerant-circuit fault.

  • 6

    Documented as faulty cylinder-top and integral sensors.

  • 8

    Documented as the cylinder not heating within the maximum temperature-increase time.

  • E 1

    Documented as a faulty air-inlet temperature sensor.

  • E 128

    Documented as a permanent pressure-switch fault.

Choose the right next step

Warranty or local repair?

Answer both questions. If the unit may be covered, we will direct you to the manufacturer first. Your answers stay in this page unless you submit a repair request.

Choose both answers to see the recommended route.

Official source

Where this result comes from

STIEBEL ELTRON Australia. STIEBEL ELTRON WWK 222/302 Operation and Installation Manual, PDF page 15. Retrieved .

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