You open the link. The page doesn't load. You wait. Still nothing. You try again. This time it says 503 Service Unavailable. You check your phone - no OTP. The deadline is tomorrow.
If this sounds familiar, you're not alone. Hundreds of parents reported the exact same problems during the AISSAC 2026 registration window. One parent wrote online - "Website for registration is not opening. Someone should check." Another - "I am getting a 503 Server error message. Please sort this out." And another - "I couldn't register due to mobile issues. Please give my son a chance."
The official server went down for many users near the deadline, with multiple parents reporting that the AISSAC portal was completely inaccessible.
The good news - most of these problems have practical workarounds. Here's what to do.
Why the AISSAC Portal Gets Slow or Crashes
Before jumping to fixes, it helps to understand why this happens.
The AISSAC portal is a government server handling lakhs of simultaneous logins - all parents, all trying to register in the same narrow window. Near deadlines, the traffic spikes massively. Servers get overloaded. Pages stop responding. OTP delivery slows down or fails completely.
This isn't a bug unique to AISSAC. Any high-traffic government portal behaves this way under deadline pressure. Candidates and parents were officially advised to complete the registration process well before the deadline to avoid last-minute technical or connectivity issues.
That warning exists for a reason. The portal will struggle on the last day. Plan accordingly.
Fix 1 - Stop Trying at Peak Hours
This is the simplest and most effective thing you can do.
Thousands of families log in between 10 AM and 8 PM. That's when server load is highest. If the page isn't loading, don't keep refreshing - that adds to the server load and makes things worse for everyone.
Try logging in between 11 PM and 5 AM. Sounds inconvenient, yes. But the server is significantly quieter at night. Many parents who struggled all day found the site working perfectly at midnight. Set an alarm if you have to. A seat in a Sainik School is worth a broken night of sleep.
Fix 2 - Clear Your Browser Cache and Try Incognito Mode
Sometimes the problem isn't the server at all - it's your own browser. Cached data from a previous session can interfere with loading the portal correctly.
Here's what to do:
Step 1 - Press Ctrl + Shift + Delete (Windows) or Command + Shift + Delete (Mac) to open your browser's clear data menu. Delete cached files and cookies, then reload the site.
Step 2 - Open an Incognito or Private window. This bypasses stored data entirely and loads the page fresh. Many users find this resolves the login issue immediately.
Step 3 - If still not working, switch browsers. If you're on Chrome, try Firefox or Edge. Government portals sometimes behave differently across browsers.
Fix 3 - OTP Not Received? Try These Steps in Order
This is the most panic-inducing issue. You enter your application number, click Send OTP, and... nothing arrives. No SMS, no email.
First - wait at least 3-5 minutes. During high traffic, OTP delivery is delayed. The message is in transit, not lost.
The OTP is generated on the registered mobile number and email ID that was used during AISSEE-2026 registration on the NTA portal.So before assuming there's a fault, confirm you're checking the right number and inbox. Not your current SIM - the one registered with NTA months ago.
Check your spam or junk folder for the email OTP. This one catches many parents off guard.
If SMS still hasn't arrived - check your network signal. A weak connection can silently block message delivery. Step outside, switch to a stronger network, and try requesting the OTP again.
Also - don't click Send OTP repeatedly. Each click generates a new OTP and invalidates the previous one. One click, then wait patiently.
Fix 4 - Getting a 503 Error? Here's What It Means
A 503 error simply means the server is temporarily overloaded or under maintenance. Multiple parents reported getting 503 Service Unavailable errors during the AISSAC 2026 registration period, confirming this was a server-side issue - not a problem with individual devices.
You cannot fix this from your end. What you can do:
Wait 15-30 minutes and try again. Server congestion usually clears. Don't sit hammering the refresh button - that won't help.
Bookmark the correct URL - pesa.ncog.gov.in/sainikschoolecounselling - and try again later. Do not use third-party links or websites claiming to redirect you to the counselling portal.
Fix 5 - Wrong Mobile Number Registered During AISSEE?
This is a harder situation. If the mobile number linked to your NTA registration is no longer active - changed SIM, lost phone, number ported - the OTP goes to a number you can't access.
In this case, email the NTA helpdesk immediately at [email protected]. Explain your situation clearly - include your AISSEE application number, roll number, and the issue you're facing. Also check the official AISSAC portal for any helpline numbers and contact them directly.
Do this without delay. These corrections take time, and deadlines don't move for individuals.
The One Mistake That Makes Everything Worse
Waiting until the last day.
It is the responsibility of the candidate to ensure timely completion of registration.The Sainik School Society has said this clearly. If the portal crashes on the final day and you haven't registered yet, that's a very difficult position to recover from.
Every time the AISSAC registration window has opened - whether in January, February, or the March-April reopen - the last 24 hours have seen the heaviest traffic and the most reported problems. Register early. Not tomorrow. Not after dinner. As soon as the window is open and your child's results are out.
Contact Details for AISSAC Portal Issues
If you've tried everything and the problem persists, reach out through official channels only:
Email: [email protected] Official Portal: pesa.ncog.gov.in/sainikschoolecounselling
The Sainik School Society has clearly stated that the counselling process is free of cost and no third party has been authorised for this purpose - candidates are advised to beware of fraudsters.Anyone offering to "fix" your registration for money is a scammer. Don't fall for it.
Technical issues are stressful. But they're fixable - if you stay calm, act early, and use the right steps. Your child worked hard to get this far. Don't let a website glitch be the reason they miss their seat.
For the latest AISSAC updates, portal news, and Sainik School admission ↗ guidance, visit SainikGuru.com.