Error, fault and alarm codes of products - what each code means, its causes and what to do - read from the manufacturers’ manuals, with the manual page each answer comes from.
The system has overheated and is locked out to prevent damage. The manual's first action is: “Air in heat exchanger Blocked or restricted primary flow Heat exchanger air flow blocked Flue restriction Flue sensor fault…
Control panel button fault code 24 indicates a stuck button or jammed PCB buttons. The manual's first action is: “Check for jammed control panel buttons”
The flame sensing fault code 20 indicates a problem with detecting the flame or failing to open the gas valve after detection. The manual's first action is: “Check flame sensing electrode and lead PCB fault”
The fan has malfunctioned or the PCB is faulty. The manual lists no action for this code.
Error code 15 indicates an internal wiring error in the system. The manual lists no action for this code.
The cylinder sensor has failed or its wiring connections are loose. The manual lists no action for this code.
Primary system pressure is too low. The manual lists no action for this code.
The system has reached its maximum number of resets allowed. The manual's first action is: “Refer to fault history codes (INFO menu d9)”
The DHW sensor fault code indicates a problem with the sensor or its wiring. The manual lists no action for this code.
Heating flow sensor fault code 05 indicates a problem with the flow sensor wire connections or the sensor itself. The manual lists no action for this code.
Gas valve electrical connection fault code 04 indicates a problem with the gas valve's lead connection or faulty components. The manual lists no action for this code.
The flue thermostat temperature is too high. The manual lists no action for this code.
02 on the Alpha InTec 30C, 34C is listed in the manual as: Overheat boiler lock out. The manual lists no action for this code.
The ignition system failed to ignite the gas. The manual's first action is: “Check pressure tubes”
All 24 error codes of the Alpha InTec 30C, 34C Alpha InTec gas boiler with their meaning, causes and what to do, taken from the manufacturer's manual with page references.