What does the Halstead Erroneous APS signal fault code mean?

Your boiler is struggling to detect that the internal fan is venting air properly, which prevents it from igniting safely.

How much does it cost to fix Halstead error code Erroneous APS signal?

Typical repair cost for the Halstead Erroneous APS signal fault is £150-300 including labour.

Missing or defective APS signal • Check APS • Check pipe connections for blockage • Check fan • Check PCB • Check flue condition

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Six most common causes of dropping pressure.

Each noise points to a different fault.

7 signs repair isn't worth it anymore.