Alpha InTec 30C, 34C Error 43: Loss of flame rectification

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

Fault code43

The system has lost its ability to confirm the flame is burning properly. The manual's first action is: “Check gas supply/working pressure Check flame sensing electrode and lead Check for flue gas recirculation Check/adjust the gas valve settings Check/adjust the fan speed settings”

Model
Alpha InTec 30C, 34C
Display shows
Loss of flame rectification (43)
Type
Fault code
Source
Manual p. 42

What 43 means

Loss of flame rectification p. 42

Common causes

  • Repeated loss of flame signal during operation (shown as E38 in the fault code history in the INFO menu) p. 42

What to do

  1. Check gas supply/working pressure Check flame sensing electrode and lead Check for flue gas recirculation Check/adjust the gas valve settings Check/adjust the fan speed settings p. 42

If 43 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 42 All 30C, 34C error codes Manual details & download

This page summarises what the manufacturer’s manual says about 43; 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.