Alpha InTec 30C, 34C Error 47: Reduced burner output

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

Fault code47

The flue thermostat has sensed high flue gas temperature (110°C) and reduced burner output to prevent damage. The manual's first action is: “Air in heat exchanger Restricted primary flow Heat exchanger air flow blocked Flue restriction Flue sensor fault Pump fault”

Model
Alpha InTec 30C, 34C
Display shows
Reduced burner output (47)
Type
Fault code
Source
Manual p. 42

What 47 means

Reduced burner output p. 42

Common causes

  • Flue thermostat has sensed high flue gas temperature (110°C) and reduced the burner output to prevent damage. If the temperature continues to rise the boiler will lock out and E03 will be displayed p. 42

What to do

  1. Air in heat exchanger Restricted primary flow Heat exchanger air flow blocked Flue restriction Flue sensor fault Pump fault p. 42

If 47 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 47; 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.