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Heat Pump Fault Finder AU

Verified codeset result

The manufacturer documentation publishes fault code E45 for the Ecosmart Pro-Series controller display, mapped to the affected Dux models listed below.

Fault code E45

Dux Ecosmart Pro-Series controller display: E45

Ecosmart Pro-Series controller display

Dux logo (for identification)

Last verified from the captured official source review.

E45 meaning for this display codeset

This page isolates Dux fault code E45 for the Ecosmart Pro-Series controller display. It does not combine the Dux E45 meaning with another controller or codeset.

Before applying the Dux E45 meaning, confirm the affected model uses the Ecosmart Pro-Series controller display. In that controller namespace, E45 means documented as discharge overheating three-times protection.

The Dux Ecosmart Pro-Series Heat Pump Installation and Owner’s Manual, H4950 Revision C source anchor on page 40 supports this Dux E45 record for the Ecosmart Pro-Series controller display.

The permanent source key dux-ecosmart-pro-series-display E45 keeps the dux-ecosmart-pro-series-display E45 controller/code pairing distinct in publication.

What the documentation says

Documented as discharge overheating three-times protection.

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

Severity

Red — urgent safety concern

Red means the documented fault involves safety-critical, leak, electrical, refrigerant, lockout or overheat language.

Source-grounded diagnosis context

Documented causes

Qualified service work

What a technician will check

These are paraphrased technician-facing checks from the manual, not homeowner instructions.

Repair, replacement and warranty context

Prioritise safety before the repair-or-replace decision

A red classification warrants urgent assessment by an appropriately licensed professional. The code alone cannot establish whether a component repair or full system replacement is proportionate.

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.

  • E09

    Documented as winter frost protection.

  • E11

    Documented as DC motor stalling.

  • E43

    Documented as high pressure switch three-times protection.

  • P01

    Documented as a bottom water temperature sensor failure.

  • P02

    Documented as a top tank water temperature sensor failure.

  • P03

    Documented as a discharge temperature sensor failure.

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 Pro-Series Heat Pump Installation and Owner’s Manual, H4950 Revision C, PDF page 40. Retrieved .

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