Fault Codes / Vaillant / F.537

VA

Vaillant F.537

Critical

flexoTHERM/aroTHERM — High pressure switch opened.

Vaillant F.537: High pressure switch opened. This fault typically halts operation and needs immediate attention.

Possible causes

Refrigerant charge too high or too low.
Flow too high / poor heat transfer.
Pressure switch or wiring faulty.

Check steps

Check charge & flow, vacuum (10 mbar).
Check HP switch & heat exchanger.

Affected parts

Druckschalter (HP)
Kältemittel

Safety note

High-pressure side — hot & pressurized. Follow F-Gas.

Source: Vaillant resmi servis kılavuzu — ManualsLib s.39: 'F.537 – High pressure switch opened'

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

Look up in Enthalio →

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