Alpha InTec 30C, 34C Error Codes

24 codes from pages 41–42 of the manual

This is the list of fault codes the Alpha InTec manual gives for the 30C, 34C Alpha InTec gas boiler. Find your code below and open it for what the manual says about its causes and what to do.

Fault codes from p. 41

CodeWhat it meansPage
01 Ignition failure p. 41
02 Overheat boiler lock out p. 41
03 High flue thermostat temperature p. 41
04 Gas valve electrical connection fault p. 41
05 Heating flow sensor fault p. 41
06 DHW sensor fault (InTec C, X, GS only) p. 41
08 Maximum number of resets p. 41
10 Primary system pressure low p. 41
12 Cylinder sensor fault (InTec S and FlowSmart only) p. 41
15 Internal wiring error p. 41
16 Fan fault p. 41
20 Flame sensing fault p. 42
24 Control panel button fault p. 42
25 Overheat lock out p. 42
27 Insufficient primary flow p. 42
29 Flue sensor fault p. 42
31 Loss of communication with external control (Alpha Climatic) p. 42
37 Low supply voltage p. 42
38 Loss of flame rectification p. 42
43 Loss of flame rectification p. 42
44 Safety lock out p. 42
46 External sensor intervention p. 42
47 Reduced burner output p. 42
51 Climatic RF communication fault p. 42

Codes and descriptions are taken from the manufacturer’s manual; page numbers link to the PDF. ManualLib is not affiliated with Alpha InTec. Found a mistake? Report an error.