Fault Codes / York / 9

YO

York 9

Critical

YCAS / YVAA — Water flow switch open / no flow.

York 9: Water flow switch open / no flow. This fault typically halts operation and needs immediate attention.

Possible causes

Pump faulty / valves closed / strainer clogged.

Check steps

Check pump, valves & strainer.

Affected parts

Strömungswächter
Pumpe

Safety note

Depressurize before work.

Source: York YCAS/YVAA Service Manual

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

Look up in Enthalio →

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