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dnsServer•codePHPerrorerrorsecurityfirewallwarningcachesettingsserver_configuration•labelCommon•warningModerate

WooCommerce 503 Error

WooCommerce returns a 503 Service Unavailable when the application fails to process a request. The error appears when server resources are exhausted, when code blocks execution, or when the backend is unreachable.

Typical triggers include maxed PHP workers, faulty plugins, theme overload, CDN or Varnish failures, firewall blocks, and database connection limits. Missing WooCommerce shortcodes also produce the same status.

Symptoms

[dashicons-warning]
503 Service Unavailable page
User sees a full page with a 503 status message.
[dashicons-cart]
Blank cart or checkout
Cart and checkout pages load empty or white.
[dashicons-admin-generic]
Admin edit blocked
Editing WooCommerce pages in the dashboard returns a 503 error.

Common Causes

Server overload
PHP workers reach their limit and reject new requests.
Faulty plugin
A plugin blocks the request cycle and triggers a 503.
Theme incompatibility
Heavy or broken theme code consumes excess resources.
Cache layer failure
CDN, Varnish or reverse proxy cannot reach the backend.
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