Site Down – Database Server Itself Is Down/Unreachable
wp-config.php credentials are correct, but the DB server/host is unreachable independent of WordPress.
Read the fix htaccess site-downSite Down – 403 Forbidden on Every Page
Every URL returns '403 Forbidden' instead of content, including the homepage, while the server itself is up.
Read the fix htaccess redirect-loop site-down sslSite Down – Too Many Redirects (ERR_TOO_MANY_REDIRECTS)
The browser refuses to load any page and reports a redirect loop, usually after an HTTPS, www, or domain change.
Read the fix gateway-error resource-overload site-down timeoutSite Down – Intermittent 502/504 Gateway Errors Under Load
Pages load fine most of the time but return '502 Bad Gateway' or '504 Gateway Timeout' during traffic spikes or…
Read the fix core-files corruption site-downSite Down – Core WordPress Files Missing or Corrupted
SFTP/file manager shows wp-admin, wp-includes, or wp-load.php missing, renamed, or zero-byte after a bad update/restore.
Read the fix billing malware suspensionSite Down – Account Suspended by Hosting Provider
Host's own placeholder/suspension page loads instead of the site; check billing status and any abuse/malware notice email.
Read the fix certificate-expired sslSite Down – SSL Certificate Error Blocking Access
Browser blocks the page entirely with a certificate warning rather than showing any site content.
Read the fix domain site-downSite Down – Domain Expired
DNS lookup fails and registrar/WHOIS shows the domain has lapsed or is in a redemption period.
Read the fix dns domainSite Down – Domain Not Resolving / DNS Misconfigured
Browser shows DNS_PROBE_FINISHED / server not found rather than a WordPress error at all.
Read the fix htaccess site-downSite Down – Corrupted or Misconfigured .htaccess File
500 Internal Server Error, server error log references .htaccess syntax; renaming it temporarily restores access.
Read the fix