How to fix 503 Service Unavailable error − Windows, Mac OS, Android, iOS

Sometimes, refreshing the website can help you fix 503 Service Unavailable error, because the issue that caused this error has been already fixed, probably on its own. Just click on the reload button and wait for the website to load.

It is possible that another background process on your computer interfered with the web browser, which led to 503 Service Unavailable error. If this is the case, you can just restart the web browser, by closing it and reopening it after a minute or two. Do note that you need to ensure that all the processes associated with the browser are fully closed, too, for the restart to be successful.

If you are not sure how to fully close your web browser, feel free to check the Don't know how to close (quit) programs/applications guide.

Turn off your computer and then turn it back on, as in most cases that would be all that takes to fix the 503 Service Unavailable error.

If you use a desktop computer, unplug it from the power cord and plug it in after a couple of minutes, whereas if you use a laptop remove its battery and reinsert it after a minute.

It is possible that a background process running on your mobile device is the reason behind 503 Service Unavailable error. In this is the case, you need to restart the mobile device. Restart it by turning it off via the power on/off (sleep/wake) button, and then turning it back on.

Maybe the router got stuck for some reason and caused error 503. Restart the router, by unplugging it from the power cord and then plugging them back in after a couple of minutes.

Note: If you use a modem, restart it, too, as it may be the reason behind the issue.

Perhaps corrupt cookies or cache files are the reason behind the 503 Service Unavailable error message. In order to fix this error message, you need to clear the cache files, the cookies and other unnecessary data.

To clear the browser's cache and cookies, feel free to check the don't know how to clear the browser cache guide and don't know how to delete browser cookies guide and find the easiest ways to do that.

It is possible that a virus or other form of malicious software has infected your computer. When a computer is invaded by viruses, files get corrupt, or damaged, and error messages like 503 Service Unavailable error can appear. Scan your computer for malicious software, and if viruses are detected, removing them from your computer should fix the issue.

Feel free to check out the virus removal and protection guide, where you can learn useful tips on how to remove viruses, and protect your computer against them.

Perhaps the current firewall or antivirus settings are the reason behind this error. Access them, perform modifications and save the changes.

Note: Before modifying settings, make sure to contact the antivirus support team for assistance and guidance.

Also, you can disable the Windows Firewall.

To disable the Windows Firewall:

To enable the Windows Firewall:

Perhaps the current firewall or antivirus settings are the reason behind this error. Access them, perform modifications and save the changes.

Note: Before making modifications to settings, make sure to contact the antivirus support team for assistance.

A quick way to fix the possible reasons for this issue is to enable and disable the airplane mode. Enabling and disabling the Airplane mode can be compared to a soft restart of the device's components, some of which are the Wi-Fi and mobile data.

If you are not sure how to enable and disable it, read the instructions in the don't know how to enable/disable the Airplane mode guide.

It is possible that wrong or badly configured DNS (Domain Name Servers) settings are responsible for the 503 Service Unavailable error message. What you need to this in this case is to reconfigure the settings, and enter new ones, if needed.

To learn how to check out and/or change the DNS settings, check out the don't know how to change the DNS settings solutions.

Maybe the issue is related to the website itself. This would definitely be the case, if you can access other websites, as well as if the website is not blocked by your antivirus or firewall settings. You can try to contact the website's owners and let them know of this issue.

Corrupt temp and system files can cause many issues to a computer owner, including errors like 503. In this case, Windows's utility Disk Cleanup is what you need, as it can delete all the unnecessary and possibly corrupt, files, and temp files among the rest. To find the Disk Cleanup and run it, feel free to follow the steps below:

1. Go to Start -> All programs -> Accessories -> System tools -> Disk Cleanup, or just type disk cleanup in the start menu search box;
   
   
2. Select the drive you want to clean up first by clicking the small arrow and click OK;
   
   

   
   
   

3.  Under Files to delete, select the file types to get rid of (by ticking the checkboxes next to them) and click on OK.

   
   *Repeat this for each drive separately ( "C:" "D:" "E:" and etc.).
   
   

   
   
   

Maybe the ISP (Internet service provider) or the operator (if you use mobile data) itself are the reason behind the 503 Service Unavailable error message. Maybe they can't connect to the website's hosting provider, or those websites are blocked by the ISP or the operator itself, for various reasons. Also, it is possible that there is a malfunction in the network of the provider you use.

To be 100% sure, contact the support team of your ISP or Operator, tell them the URL address of the website you can't visit, and they will instruct you on the next steps you need to take.

The commands below, when entered in the Command Prompt (CMD) will flush and renew the DNS and the IP address, and possibly fix error 503.

Follow the steps below, in order to access the command prompt (CMD) and enter the commands:

1. Go to the start menu and type cmd or command prompt. Once it appears, right-click on it and select Run as Administrator;
   
   
2. Type the following commands and press enter after you type each of them:
   
   ipconfig /flushdns
   ipconfig /registerdns
   ipconfig /release
   ipconfig /renew
   netsh winsock reset
   
   
3. Restart your computer.

Maybe it is the web browser you are using that is the reason behind this issue. If a particular website opens correctly in one browser, but not in another, then use the web browser where the website open correctly. There are many web browsers available which you can install and use.