P (ΔP-V) Low

Alpha P (ΔP-V) Fault Code

Also written as PPV — same fault.

The Alpha P (ΔP-V) fault code means: your boiler is currently set to a specific operational mode that balances water flow and energy use, which is normal behavior rather than a fault.. It appears on 4 Alpha models in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Proportional curve (Green LED)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Alpha models that show the P (ΔP-V) fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Alpha P (ΔP-V) fault code information on this page is sourced and cross-checked against the official Alpha service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026