Article ID: 120704, created on Mar 25, 2014, last review on Oct 27, 2015

  • Applies to:
  • Plesk 12.5 for Windows
  • Plesk 12.0 for Windows
  • Plesk 11.0 for Windows
  • Plesk 11.5 for Windows


1) Plesk Control Panel shows the error: Service Unavailable - HTTP Error 503.

2) In event viewer, system logs show:

    Application pool PleskControlPanel has been disabled. Windows Process Activation Service (WAS) did not create a worker process to serve the application pool because the application pool identity is invalid.


Password for psaadm user in IIS->Application pools->PleskControlPanel pool does not correspond actual password for psaadm user in Windows users.


Launch Plesk Reconfigurator->Repair Plesk Installation->Plesk Services.

Search Words


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