How to Fix HTTP Error 503 (Service Unavailable)

HTTP Error 503 – “Service Unavailable” – means the server is up but can’t handle the request right now. It is usually temporary: a traffic spike, a resource limit, scheduled maintenance, or, on WordPress, an update that got stuck. Here is how to clear it.

What the error means

A 503 is the server saying “not now.” Unlike a 500, nothing is broken – the server is simply too busy, out of resources, or deliberately offline for a moment. The job is to find which, and whether it clears on its own.

If you are just visiting

Wait a minute and reload – a 503 is often short-lived, especially if the site is updating or briefly overloaded. If it lasts, the owner needs to look into it.

If the website is yours

1. Check for a stuck WordPress update. If a plugin or core update failed, WordPress can leave a .maintenance file in the site root that forces a 503. Delete that file and reload.
2. Rule out overload. A traffic spike or a heavy plugin or query can exhaust resources. Pause a suspect plugin and watch whether the 503 clears.
3. Read the error log for the cause – see how to find and fix PHP errors.
4. Check whether maintenance is planned. If your host is doing scheduled work, the 503 is expected and will end when it finishes.

On JetHost hosting

If a 503 persists on a site you host with us and there is no stuck update, open a ticket and we’ll check your resources and the server. Regular 503s under load usually mean it is time for a bigger plan. Related errors: HTTP 500 and HTTP 502.

Frequently asked questions

Need more help?

Still seeing a 503 on a site you host with us? Open a ticket through Client Area → Support Tickets and we’ll check resources, maintenance status and the server.