Dimplex Combi 38 Fault codes & diagnostics

1 fault code with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

Combi Natural Gas 38 kW 2008 onwards Discontinued
GC Number 47-149-01
Download the Dimplex Combi 38 manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. PDF

The fault code is already on your display

Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Which version do you have?

The GC number on your boiler's data badge identifies the exact appliance and production years, as recorded in the UK Product Characteristics Database.

GC number Appliance (register name) Produced
47-149-01 Combi 38 2008–present

Appliance names and production years are taken from the UK Product Characteristics Database (the SAP/SEDBUK register). Where a GC number is also printed in this model's own manufacturer manual, both sources were checked to agree.

All 1 documented codes

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No light display when tap on

Your boiler is not detecting when you turn on the hot tap, so it isn't firing up to heat the water.

High Engineer only £120-£200

Parts commonly replaced

  • DHW Flow Switch
  • Hot Water Thermistor (NTC Sensor)

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