Error 503 Service
                     HTTP Error 503 Service 
Unavailable
What is HTTP error 503 Service Unavailable?
In technical language, there are HTTP response status codes that are used for 
communication from server to client. These codes point out whether or not an 
HTTP request was able to be fulfilled. Among the five types of HyperText Transfer 
Protocol (HTTP) responses, server errors (500- 599) sum up the fifth category. 
What is Server Sided Error?
An HTTP error indicates a disruption in a seamless user experience. All those 
response status codes that initiate with the numeric “5” communicate the instances 
where the server has met with an error. There are 11 such server-sided errors. It is a 
common mistake to confuse the 5xx errors with one another.
Mostly because all of them represent a server error response. However, these 
responses individually stand for distinct kinds of server errors. Besides this, there are 
separate ways to solve them because each server-sided error is different.
Causes of HTTP Error 503
In order to deal with HTTP error 503, it is essential to get to the root of 
the problem; to recognize its causes.
As understood above, an HTTP error 503 status code conjures up due to 
server problems. The impotence of a web page or website to access any 
service can be due to :
Server “down” for Maintenance
Ongoing server maintenance for example during a plugin, theme, or 
software update can possibly cause this HTTP error 503. In this case, 
the website goes into ‘maintenance mode’ and will display a message 
as such, “Briefly unavailable for scheduled maintenance. Check back in 
a minute.” You can also check if your site is down for others too
Technical Difficulties
Technical trouble encountered by the host company can also 
be the cause of the HTTP error 503. This results in a 
communication blockade between a server and the website. 
Therefore any responsible administrator would always opt for 
a reliable hosting service.
Server Inadequacy
The incapacity of the server to support an overwhelming 
number of users due to an abrupt increase in traffic can also 
cause this HTTP error 503. The sudden rise in traffic takes the 
server off-guard and throws it offline.