Yahoo error 503: When are these encountered and how can it be solved?

What is Yahoo 503 error?
Yahoo 503 errors or 503 service unavailable errors are the HTTP status code when the web site server is
not available at a moment. This also occurs when there is some maintenance or overloading on the
server. In such cases the website is not accessible.
How to Fix Yahoo 503 error?
When you encounter Yahoo 503 error you can check if you are the only one encountering the error or
some others are also encountering this. If you are the only one encountering the error then there are
chances that the old cache, cookies, or some other history files might be causing the problem. In such
cases clearing the browser history, cookies, or cache may work. If you are still are facing the problem try
restarting your PC, or modem. Try using the link on some other browser or PC. You can also try waiting
for some time for the recently encountered errors as the Yahoo technicians fix the problem as and when
reported if the problem occurs at their server side.