Vaillant ecoTEC plus Fault Codes

CombiSystemRegular Natural GasLPG 12-38 kW 2005-present

All 4 fault codes

Code	Severity	Plain English	DIY
P.00	Low	Your boiler is currently running an automatic program to remove trapped air from the system, which usually happens during startup or after maintenance.	Yes
P.01	Medium	Your boiler has failed while running a specific test used for commissioning or high-power performance checks.	Yes
P.02	Low	Your boiler is not in a fault state; it is simply running a pre-programmed test to check how it performs at its lowest power setting.	Yes
P.06	Low	Your boiler is currently running a self-check program to fill the heating system with water and is not experiencing a permanent fault.	Yes

Monthly cover means no unexpected bills when your boiler breaks down.