Static overlay

Energy bills have been increasing. There are still ways to reduce this.

Vaillant S Codes New

StatuscodeLinkStatusMeaningApplicable to
S.00Heating: No heat de- mandHeating has no heat demand. The burner is off.Heating mode (all models)
S.01Heating mode: Fan start- upThe fan start-up for heating mode is activated.Heating mode (all models)
S.02Heating mode: Pump pre-runThe pump prerun for heating mode is activated.Heating mode (all models)
S.03Heating mode: IgnitionThe ignition for heating mode is activated.Heating mode (all models)
S.04Heating mode: Burner onThe burner for heating mode is activated.Heating mode (all models)
S.05Heating mode: Pump/fan overrunThe pump/fan overrun for heating mode is activated.Heating mode (all models)
S.06Heating mode: Fan over- runThe fan overrun for heating mode is activated.Heating mode (all models)
S.07Heating mode: Pump overrunThe pump overrun for heating mode is activated.Heating mode (all models)
S.08Heating mode: Anti-cyc- ling timeThe anti-cycling time for heating mode is activated.Heating mode (all models)
S.10DHW demandThe domestic hot water demand is activated.Domestic hot water mode (ecotec combination boilers only)
S.11DHW mode: Fan start-upThe fan start-up for domestic hot water mode is activated.Domestic hot water mode (ecotec combination boilers only)
S.13DHW mode: IgnitionThe ignition for domestic hot water mode is activated.Domestic hot water mode (ecotec combination boilers only)
S.14DHW mode: Burner onThe burner for domestic hot water mode is activated.Domestic hot water mode (ecotec combination boilers only)
S.15DHW mode: Pump/fan overrunThe pump/fan overrun for domestic hot water mode is activated.Domestic hot water mode (ecotec combination boilers only)
S.16DHW mode: Fan overrunThe fan overrun for domestic hot water mode is activated.Domestic hot water mode (ecotec combination boilers only)
S.17DHW mode: Pump over- runThe pump overrun for domestic hot water mode is activated.Domestic hot water mode (ecotec combination boilers only)
S.20DHW demandThe domestic hot water demand is activated.Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only)
S.21DHW mode: Fan start-upThe fan start-up for domestic hot water mode is activated.Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only)
S.22DHW mode: Pump pre- runThe pump prerun for domestic hot water mode is activated.Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only)
S.23DHW mode: Ignition Burner onThe ignition for domestic hot water mode is activated.Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only)
S.24DHW mode:The burner for domestic hot water mode is activated.Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only)
S.25DHW mode: Pump/fan overrunThe pump/fan overrun for domestic hot water mode is activated.Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only)
S.26DHW mode: Fan overrunThe fan overrun for domestic hot water mode is activated.Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only)
S.27DHW mode: Pump over- runThe pump overrun for domestic hot water mode is activated.Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only)
S.28DHW anti-cycling timeThe anti-cycling time for domestic hot water mode is activated.Warm start (ecotec combination boilers only) / Charge hot water cylinder (ecotec systems boilers only)
S.30No heat demand: Con- trollerRoom thermostat blocks heating mode.All boilers
S.31No heat demand: Sum- mer modeSummer mode is activated; there is no heat demand.All boilers
S.32Waiting time deviation: Fan speedThe waiting period for the fan start-up is activated.All boilers
S.34Heating mode: Frost pro- tectionThe frost protection function for heating mode is activated.All boilers
S.39Contact thermostat triggeredThe surface-mounted thermostat or the condensate pump has triggered.All boilers
S.40Comfort protection act- iveThe comfort protection mode is activated.All boilers
S.41Water pressure too highThe system pressure is too high.All boilers
S.42Flue non-return flap closedFlue non-return flap return signal blocks burner operation (only in conjunction with the multi-functional module) or condensate pump defective, heat demand is blocked. All boilers
S.46Comfort protection: Min- imum load, loss of flame
Comfort protection mode for flame loss at minimum load is activated.All boilers
S.53Waiting time: Water shortageThe product is within the waiting period of the modulation block/operating block function as a result of a water deficiency (flow/return spread too large).All boilers
S.54Waiting time: Water shortageProduct is in the waiting period of the operation blocking function as a result of low water pressure (temperature gradient).All boilers
S.57Waiting time: Measuring programThe product is within the waiting period as a result of the measuring programme.
All boilers
S.58Burner modulation limit- ationThe burner modulation limitation is activated.
All boilers
S.61Fault: Incorrect gas typeThe coding resistor on the PCB does not match the entered gas group (see also F.92)All boilers
S.62Adjust CO2Set the CO2 content.All boilers
S.63Fault: Check gas routeA fault message is activated. Check the gas route.All boilers
S.76Service message: Check water pressureA service message is activated. Check the water pressure.All boilers
S.88Purging programme is runningThe purge programme is activated.All boilers
S.92Water circulation volume self-testThe self-test for the water circulation volume is activated.All boilers
S.93Flue gas measurement not possible
Flue gas analysis is not currently possible.All boilers
S.96Return temperature sensor self-testThe self-test for the return temperature sensor is activated.All boilers
S.97Water pressure sensor self-testThe self-test for the water pressure sensor is activated.All boilers
S.98
Flow/return temperature sensor self-testThe self-test for the flow/return temperature sensor is activated.All boilers
S.99Vaillant self-testThe Vaillant self-test is activated.All boilers

Disclaimer: Information on this website is provided for informational purpose therefore we cannot accept liability for subsequent problems. All repair tasks should be carried out by qualified trades people. We may also receive commission payments when you are taken to external websites and complete purchases from third party sellers, once you leave our site, we cannot be held liable for your purchases.