Alpha InTec 30C, 34C Error 12: Cylinder sensor fault (InTec S and FlowSmart only)

Alpha InTec gas boiler · taken from the manufacturer’s manual, pages cited

Fault code12

The cylinder sensor has failed or its wiring connections are loose. The manual lists no action for this code.

Model
Alpha InTec 30C, 34C
Display shows
Cylinder sensor fault (InTec S and FlowSmart only) (12)
Type
Fault code
Source
Manual p. 41

What 12 means

Cylinder sensor fault (InTec S and FlowSmart only) p. 41

Common causes

  • Cylinder sensor wiring connections p. 41
  • Cylinder sensor faulty p. 41

If 12 is still not resolved

The manual gives no further instruction for this code. Open the code table in the PDF or contact Alpha InTec service.

Open the manual at page 41 All 30C, 34C error codes Manual details & download

This page summarises what the manufacturer’s manual says about 12; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Alpha InTec. Found a mistake? Report an error.