Fault Codes / Vaillant / F.733

Critical

flexoTHERM/aroTHERM — Evaporation temperature too low.

Possible causes

• No flow in source circuit (heating).
• Fan unit fouled or EEV fault.

Check steps

• Check flow & sizing of source circuit.
• Check fan unit & EEV (sensor/actuator test).

Affected parts

• Umweltkreispumpe
• EEV
• Niederdrucksensor

Safety note

Source: Vaillant resmi servis kılavuzu — vaillant.de (bağımsız yeniden doğrulandı): 'Die Verdampfungstemperatur ist zu niedrig.' — kodbazı ile birebir örtüşüyor.

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

Look up in Enthalio →

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