====**Issue: **//HTTP Error 503. The service is unavailable// in IIS as shown in the picture below is caused if the application pool is paused or disabled.==== 



{{::http:2.bp.blogspot.com-6n1osks1mj0ud7j_orz_hiaaaaaaaaats1otrfduhf6ws1600503_error.png?nolink&|}}



==== Steps to resolve: ====
  * Open IIS and look for the application pool of the selected website. here in this example the website name is test.
  * Select the Application Pool as shown in the diagram below:



{{::http:2.bp.blogspot.com-s3kleqy2s5yud7itqzmpjiaaaaaaaaaty4uvcimnfgzqs640error_503.png?nolink&704|}}
  * Right click on the website name in the Application Pool and then click on Start as shown in the picture below:



{{::http:1.bp.blogspot.com-q-aodlr0gvuud7jxvghqniaaaaaaaaatg1hlevecmw9as640app_pool.png?nolink&512|}}
  * Browse the website and the error should be resolved.