WordPress Cache Not Working? A Troubleshooting Checklist

When caching appears ineffective, verify response behavior, exclusions and purge rules before switching plugins.

Confirm the page is cacheable

Logged-in pages, carts, checkouts and personalized URLs may be deliberately excluded. Test a public URL in a clean browser session.

Inspect response headers and source

Hosting and plugins may expose cache headers or HTML comments that indicate HIT, MISS or bypass states. Use the signals your stack actually provides.

Check constant invalidation

Frequent content changes, plugin hooks or misconfigured integrations can clear the cache faster than it can become useful.

Look for duplicate layers

Two caching systems can fight over purge behavior. Document which layer owns page caching, browser rules, CDN cache and object cache.

Test after one change at a time

Disable or reconfigure one layer, purge, retest, and keep notes. Random plugin swapping makes diagnosis harder.