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Heat Pump Fault Finder AU

Verified codeset result

The manufacturer documentation publishes fault code E04 for the Smart Life app error display, mapped to the affected Dux models listed below.

Fault code E04

Dux Smart Life app error display: E04

Smart Life app error display

Dux logo (for identification)

Last verified from the captured official source review.

E04 meaning for this app codeset

This page isolates Dux fault code E04 for the Smart Life app error display. It does not combine the Dux E04 meaning with another controller or codeset.

Before applying the Dux E04 meaning, confirm the affected model uses the Smart Life app error display. In that controller namespace, E04 means documented as a compressor discharge temperature sensor failure.

The Dux Ecosmart Heat Pump Installation and Owner’s Manual, H4149 Revision B source anchor on page 31 supports this Dux E04 record for the Smart Life app error display.

The permanent source key dux-ecosmart-dhc-app E04 keeps the dux-ecosmart-dhc-app E04 controller/code pairing distinct in publication.

What the documentation says

Documented as a compressor discharge temperature sensor failure.

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.

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.

Related codes from this codeset

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

  • E01

    Documented as a water tank temperature sensor failure.

  • E03

    Documented as an ambient temperature sensor failure.

  • E05

    Documented as a suction temperature sensor failure.

  • E06

    Documented as an evaporator coil temperature sensor failure.

  • E07

    Documented as high compressor discharge temperature with overheat protection active.

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

Dux Manufacturing Limited. Dux Ecosmart Heat Pump Installation and Owner’s Manual, H4149 Revision B, PDF page 31. Retrieved .

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