The cause of a ‘503 Service Unavailable’ error is typically high resource consumption by your web hosting service, or more directly a script inside it.
You can determine the cause through a range of methods:
- Check Resource Usage within cPanel to determine if you’re hitting your CloudLinux limits.
- Check AWStats within cPanel to see if there is an unusual traffic hitting your website; particularly foreign IP’s maliciously targeting you.
- If you have customised your PHP environment, ensure you haven’t set memory_limit too high.
- Disable any unnecessary scripts and plugins.
If you are unable to determine the cause, you may need to get in touch with our Technical Support team via eTicket.