Fault Codes / Vaillant / F.714

High

flexoTHERM/aroTHERM — Source circuit: pressure too low.

Possible causes

• Leak or air pocket in source circuit.
• Pressure sensor faulty.

Check steps

• Check leaks, top up medium & bleed.
• Check pressure sensor, replace if needed.

Affected parts

• Drucksensor Umweltkreis
• Sole/Wasser

Safety note

Source: Vaillant resmi servis kılavuzu — Vaillant flexoTHERM exclusive VWF 57/4 — Installation and Maintenance Instructions (E Fault Codes table, page 44): "F.714 — Environment circuit: Pressure too low — Pressure sensor defective; pump fault detected." Independently corroborated by Vaillant's own official consumer erro…

Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.

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