As a Free Hosting provider I can not say anything bad words about my own hosting site, however, there are lots of restrictions on free hosting accounts for every free user. And we can not expect more than that at this cost, from last week we keep getting support tickets that users are getting this error while they try to pull up their website.
Service Temporarily Unavailable
The server closed the connection without sending any data.
The server is temporarily unable to service your request due to maintenance downtime or capacity problems.
Due to heavy load on the server, connections may be temporarily blocked from locations that fetch an unusually high number of pages.
We apologize for the inconvenience.
If you are getting the same error on your website hosted on a free account that means, the server, where your website is hosted, is down for any reason or got overloaded it may take 1-2 days to become live again.
How do you find is the server is down?
You need to login to your Cpanel and the error message will appear on top.