Manufacturer error-code directory

De Dietrich error codes

Find the meaning of De Dietrich fault, warning and status codes, with model context, documented causes, safe checks and links to available manufacturer guidance.

8documented codes

1products and models

1product categories

About De Dietrich error codes

An error code is a diagnostic clue, not a complete repair diagnosis. De Dietrich may reuse similar-looking codes across different products, model generations or regions, so always confirm the complete code and exact model before following instructions or ordering parts.

This profile connects every indexed De Dietrich code to its dedicated explanation page. Each page is structured around the search intent: a quick meaning, symptoms, likely causes, safe troubleshooting, reset guidance, applicable products and the point at which professional help is appropriate. Records marked as verified include the manufacturer or another authoritative technical source.

Start with the code shown on the display, then narrow the result by product or model. Do not assume that a reset has repaired the underlying fault. If a code returns, the product is unsafe, or diagnosis requires internal electrical, gas, refrigerant or moving components, stop and use an authorised technician.

Start here

Popular De Dietrich codes

33De Dietrich · C 230 ECO floor-standing condensing boiler · Europe and North AmericaDe Dietrich C 230 ECO 33 error code – Boiler sensor disconnectedThe main boiler temperature sensor is open-circuit or disconnected.32De Dietrich · C 230 ECO floor-standing condensing boiler · Europe and North AmericaDe Dietrich C 230 ECO 32 error code – Boiler sensor short circuitThe main boiler temperature sensor circuit is short-circuited.8De Dietrich · C 230 ECO floor-standing condensing boiler · Europe and North AmericaDe Dietrich C 230 ECO 8 error code – Return sensor reading below −10°CThe return-temperature sensor reports a temperature below −10°C.7De Dietrich · C 230 ECO floor-standing condensing boiler · Europe and North AmericaDe Dietrich C 230 ECO 7 error code – Return sensor disconnectedThe boiler return-temperature sensor is open-circuit or disconnected.6De Dietrich · C 230 ECO floor-standing condensing boiler · Europe and North AmericaDe Dietrich C 230 ECO 6 error code – Return sensor short circuitThe boiler return-temperature sensor circuit is short-circuited.4De Dietrich · C 230 ECO floor-standing condensing boiler · Europe and North AmericaDe Dietrich C 230 ECO 4 error code – Heat-exchanger sensor reading below −10°CThe heat-exchanger sensor reports a temperature below −10°C.3De Dietrich · C 230 ECO floor-standing condensing boiler · Europe and North AmericaDe Dietrich C 230 ECO 3 error code – Heat-exchanger sensor disconnectedThe heat-exchanger temperature sensor is open-circuit or disconnected.2De Dietrich · C 230 ECO floor-standing condensing boiler · Europe and North AmericaDe Dietrich C 230 ECO 2 error code – Heat-exchanger sensor short circuitThe heat-exchanger temperature sensor circuit is short-circuited.

Browse by equipment

De Dietrich product groups

Boilers and HVAC8 codes

Code directory

All De Dietrich codes

Showing 1–8 of 8

Open advanced search →

2De Dietrich · C 230 ECO floor-standing condensing boiler · Europe and North AmericaDe Dietrich C 230 ECO 2 error code – Heat-exchanger sensor short circuitThe heat-exchanger temperature sensor circuit is short-circuited.3De Dietrich · C 230 ECO floor-standing condensing boiler · Europe and North AmericaDe Dietrich C 230 ECO 3 error code – Heat-exchanger sensor disconnectedThe heat-exchanger temperature sensor is open-circuit or disconnected.32De Dietrich · C 230 ECO floor-standing condensing boiler · Europe and North AmericaDe Dietrich C 230 ECO 32 error code – Boiler sensor short circuitThe main boiler temperature sensor circuit is short-circuited.33De Dietrich · C 230 ECO floor-standing condensing boiler · Europe and North AmericaDe Dietrich C 230 ECO 33 error code – Boiler sensor disconnectedThe main boiler temperature sensor is open-circuit or disconnected.4De Dietrich · C 230 ECO floor-standing condensing boiler · Europe and North AmericaDe Dietrich C 230 ECO 4 error code – Heat-exchanger sensor reading below −10°CThe heat-exchanger sensor reports a temperature below −10°C.6De Dietrich · C 230 ECO floor-standing condensing boiler · Europe and North AmericaDe Dietrich C 230 ECO 6 error code – Return sensor short circuitThe boiler return-temperature sensor circuit is short-circuited.7De Dietrich · C 230 ECO floor-standing condensing boiler · Europe and North AmericaDe Dietrich C 230 ECO 7 error code – Return sensor disconnectedThe boiler return-temperature sensor is open-circuit or disconnected.8De Dietrich · C 230 ECO floor-standing condensing boiler · Europe and North AmericaDe Dietrich C 230 ECO 8 error code – Return sensor reading below −10°CThe return-temperature sensor reports a temperature below −10°C.