If DeepSeek is not working, start by checking whether the problem is a live service issue or something on your device, browser, account, network, or API setup. Last verified: July 11, 2026. DeepSeek’s official status page can change in real time. At the time of verification, it showed “Everything is running smoothly,” but you should always check the current status page before changing your setup.
For most users, the fastest fixes are: refresh the page, restart the app, try a different browser or network, clear DeepSeek site data, disable problematic extensions, and wait if you see “The server is busy. Please try again later.” For developers, check the API status code first: a 401 usually points to the API key, 402 to balance, 429 to too many requests, and 503 to server overload. DeepSeek’s official API documentation lists these error meanings and recommended actions.
Quick Answer: What to Do First
Try these steps in order:
- Check DeepSeek status — If the web chat or API is degraded, waiting is usually better than changing your setup.
- Refresh or restart — Reload the page, close and reopen the app, or restart your browser.
- Try another browser, device, or network — This quickly tells you whether the issue is local.
- Clear DeepSeek cache and cookies — Useful when the page loads incorrectly, login loops, or old sessions break.
- Disable extensions temporarily — Ad blockers, script blockers, privacy tools, and AI extensions can interfere with chat apps.
- Check login/account messages carefully — Some errors point to unsupported email domains or temporary suspension.
- For API users, read the status code — Fix 400/401/402/422 locally, slow down on 429, and retry later on 500/503.
Quick Diagnosis: Match the Symptom to the Likely Cause
| Symptom | Likely cause | First fix to try | When to wait or contact support |
|---|---|---|---|
| “The server is busy. Please try again later.” | High traffic, overloaded service, or temporary backend delay | Wait a few minutes, retry once, start a new chat, reduce prompt size | Wait if status shows issues; contact support only if it persists across devices and networks |
| DeepSeek page not loading | Browser cache, extension conflict, DNS/network issue, or service outage | Try incognito/private mode, another browser, or another network | Wait if status page reports an incident |
| DeepSeek app not working | App cache, old app version, unstable connection, device issue | Force close, update from official app store, clear cache | Contact support if the same account fails on multiple devices |
| Login failed | Wrong login method, session issue, unsupported email, account restriction | Clear cookies, try the original login method, read the exact error | Contact DeepSeek for account suspension or unsupported email issues |
| Unable to register | Unsupported email domain, temporary registration problem, verification issue | Try a major email provider and check spam folder | Contact DeepSeek if the official FAQ applies but registration still fails |
| Chat stuck generating | Long prompt, overloaded server, unstable connection, or browser issue | Stop generation, shorten the prompt, start a new chat | Wait if many users are reporting slowness or status is degraded |
| Works on one device but not another | Local browser/app/cache/device problem | Compare browser, extensions, network, and app version | Rarely needs support unless tied to account access |
| API 401 | Wrong or missing API key | Check Authorization: Bearer ... and environment variables | Contact support only if a known-good key fails everywhere |
| API 402 | Insufficient balance | Check billing and top up | Contact support for billing/top-up mismatch |
| API 429 | Requests sent too quickly or concurrency limit exceeded | Reduce parallel requests and add backoff | Request capacity expansion if your business needs higher concurrency |
| API 500/503 | DeepSeek server issue or overload | Retry after a short wait with backoff | Contact support if repeated and status does not explain it |
1. Check Whether DeepSeek Is Down
Before clearing caches or changing network settings, check whether DeepSeek itself is having trouble.
Use the official status page to verify:
- API Service
- Web Chat Service
- recent incidents
- degraded performance
- resolved outages
The public status page shows system status and recent uptime for API and web chat services, so it is a better first source than random social posts or third-party outage pages.
A few things to keep in mind:
- If the status page shows an outage, local fixes may not help.
- If the status page is normal but DeepSeek fails only on your device, focus on browser, app, network, or account fixes.
- If DeepSeek fails across multiple devices, browsers, and networks, it may still be a regional or partial issue even if the status page has not updated yet.
- Past outages can happen: Reuters reported a major DeepSeek chatbot outage on March 30, 2026 that lasted 7 hours and 13 minutes, according to DeepSeek’s status website at the time.
2. Fix “The Server Is Busy. Please Try Again Later”
The “server is busy” message usually means your request is reaching DeepSeek, but the service is too loaded to respond normally. This is different from a blank page, DNS failure, or login problem. In the web chat, “server busy” is a user-facing message and does not necessarily mean the service returned a formal HTTP 503 response. API users should check the actual HTTP status code and error body before diagnosing the problem.
Try this:
- Wait a few minutes before retrying. Repeatedly clicking retry can make the problem worse for you and does not fix a server-side queue.
- Start a new chat. If one thread is stuck, a fresh conversation may work.
- Shorten the prompt. Very long prompts, file-heavy requests, or complex reasoning tasks can take longer and may fail during busy periods.
- Avoid rapid repeated prompts. Send one request, wait, then retry only if needed.
- Check status before changing local settings. If DeepSeek is degraded, clearing cookies or reinstalling the app is unlikely to help.
- Try again outside peak usage. If the issue is demand-related, waiting may be the most reliable fix.
Separately, for API users who receive an actual HTTP 503 response, DeepSeek’s official error-code page defines 503 Server Overloaded as a high-traffic overload and recommends retrying after a brief wait.
3. Fix DeepSeek Not Loading in a Browser
If DeepSeek is not loading in Chrome, Safari, Edge, Firefox, or another browser, use a quick isolation test: open DeepSeek in a private/incognito window. If it works there, your normal browser profile is probably the issue.
Browser fixes to try
- Hard refresh the page
- Windows/Linux:
Ctrl + F5 - Mac:
Cmd + Shift + R
- Windows/Linux:
- Open DeepSeek in private/incognito mode
- If it works, the issue may be cookies, cached files, or extensions.
- Disable extensions temporarily
Focus on extensions that change pages or network requests, such as:- ad blockers
- script blockers
- privacy blockers
- VPN/proxy extensions
- translation extensions
- AI assistant extensions
- Clear DeepSeek site data
Instead of clearing your whole browser history, clear cookies and cache only for DeepSeek if your browser allows it. This can fix login loops, broken sessions, and pages that partially load. - Try another browser
If DeepSeek works in one browser but not another, the issue is probably local to the broken browser. - Check your device date and time
Incorrect system time can sometimes cause session, certificate, and login issues. - Restart the browser or device
This is basic, but it clears stuck processes and network sessions.
4. Fix DeepSeek App Not Working on Mobile
If the DeepSeek app is not working on iPhone or Android, separate account problems from device problems. The easiest test is to try signing in through the browser. If DeepSeek works in the browser but not in the app, focus on the app. For installation, verification, and platform-specific guidance, see our DeepSeek app guide.
Try these steps:
- Force close and reopen the app
This clears temporary app freezes. - Switch networks
Try Wi-Fi, then mobile data. If one works and the other fails, the issue may be your router, ISP, DNS, firewall, or mobile network. - Update the app
Use the official DeepSeek app download page, or verify the DeepSeek listing directly on the Apple App Store or Google Play. Avoid unofficial APKs, clone apps, or “modified” DeepSeek clients because they may expose your account, prompts, or API keys. - Clear app cache
On Android, you can often clear cache from app settings. On iOS, you may need to offload or reinstall the app if cache-related problems persist. - Check storage and permissions
Low storage can make apps unstable. If the app uses file upload, photo access, or microphone features, confirm the relevant permissions. - Reinstall only after simpler fixes
Reinstalling may help with corrupted app data, but it should not be the first step if the issue is a live outage or account error.
5. Fix Login, Registration, and Account Problems
Login issues need a different approach from loading issues. Read the exact error message before trying random fixes. For step-by-step account access instructions, see our DeepSeek login guide.
If DeepSeek says your email domain is not supported
DeepSeek’s official FAQ says the message “Login failed. Your email domain is currently not supported for registration” means the email is not supported by DeepSeek. The FAQ recommends signing up with a major international email provider such as Gmail, Outlook, Hotmail, or Yahoo, and contacting service@deepseek.com if the issue persists.
If your account is temporarily suspended
DeepSeek’s FAQ says a temporary suspension message indicates the account triggered suspension protocols due to potential violations of platform usage guidelines. The FAQ directs users who believe this is an error to submit an account suspension appeal, and says most reviews are completed within three business days.
If login keeps looping or fails silently
Try this:
- Clear DeepSeek cookies and site data.
- Disable browser extensions.
- Try private/incognito mode.
- Use the same login method you used originally.
- Try another browser or device.
- Check whether your email verification code is in spam or promotions.
- Wait and retry if the status page shows service issues.
If you deleted an account and created a new one
Be careful with billing and account history. DeepSeek’s FAQ says deleting an account also deletes the chat account and chat history, and any remaining balance in the Open Platform account is forfeited.
6. Fix Network, DNS, VPN, and Regional Problems
If DeepSeek works on one network but not another, the problem may be network routing, DNS, firewall rules, VPN configuration, or local restrictions.
Try this:
- Switch between Wi-Fi and mobile data
This quickly shows whether your home/work network is the issue. - Restart your router
Useful if other sites are slow or unstable too. - Disable VPN or proxy temporarily
Some VPNs trigger verification, slow routing, or blocked connections. A VPN can sometimes help with routing problems, but it is not a universal fix and may violate workplace rules, service terms, or local regulations. - Try a different DNS provider
This may help if your ISP’s DNS is failing to resolve DeepSeek correctly. Do not change DNS if your workplace or school requires a specific configuration. - Check firewall or workplace restrictions
Corporate, school, and public Wi-Fi networks may block AI tools, streaming responses, file uploads, or API endpoints. - Avoid bypassing legal or organizational restrictions
If DeepSeek is blocked by your employer, school, or local rules, do not try to bypass those controls. Ask the administrator or use an approved tool.
7. DeepSeek API Not Working: Developer Checklist
If the DeepSeek API is not working, do not troubleshoot it like the web app. Start with the HTTP status code, request body, model name, base URL, API key, balance, and concurrency.
DeepSeek’s API docs say the OpenAI-format base URL is https://api.deepseek.com, the Anthropic-format base URL is https://api.deepseek.com/anthropic, and the current API model options include deepseek-v4-flash and deepseek-v4-pro. The docs also note that deepseek-chat and deepseek-reasoner are scheduled for deprecation on July 24, 2026 at 15:59 UTC.
API checklist
Check these in order:
- Base URL
- OpenAI format:
https://api.deepseek.com - Anthropic format:
https://api.deepseek.com/anthropic
- OpenAI format:
- Authorization header
Your request should send the API key as a bearer token, for example:Authorization: Bearer YOUR_DEEPSEEK_API_KEY - Environment variables
Confirm your app is actually loading the key you think it is loading. A common mistake is settingDEEPSEEK_API_KEYbut reading a different variable name in code. - Model name
Use current model names from the official docs. If your integration still uses older aliases, check the current deprecation status before assuming DeepSeek is down. - Request body
Validate JSON syntax, required fields, message format, and unsupported parameters. - Balance
If you receive 402, check billing before retrying. - Concurrency and pacing
DeepSeek’s rate-limit documentation says concurrency limits are calculated at the account level, not per API key, and requests above the concurrency limit receive HTTP 429. As of the last verification on July 11, 2026, the documented account-level limits were 500 concurrent requests fordeepseek-v4-proand 2,500 fordeepseek-v4-flash. Because these limits may change, verify the official rate-limit documentation before designing production capacity. - Streaming behavior
DeepSeek’s FAQ says the API uses non-streaming output by default, while the web service uses streaming output. If your API response feels slower than the web UI, enabling streaming may improve perceived interactivity. - Keep-alive handling
DeepSeek’s rate-limit documentation says non-streaming requests may return empty lines and streaming requests may return SSE keep-alive comments while waiting; custom HTTP parsers should handle these correctly.
DeepSeek API error codes and fixes
The table below summarizes the most common errors. For a more detailed reference, see our DeepSeek API error codes guide. The error meanings and recommended actions should always be verified against DeepSeek’s official API documentation.
| Error | Meaning | Likely cause | Recommended fix | Should you retry? |
|---|---|---|---|---|
| 400 | Invalid Format | Request body format is wrong | Fix JSON structure and request format | No, fix the request first |
| 401 | Authentication Fails | Wrong API key | Check key, header, environment variable, and whether the key exists | No, unless you changed the key |
| 402 | Insufficient Balance | Account balance is empty | Check billing and top up | No, fix billing first |
| 422 | Invalid Parameters | Parameters are invalid | Read the error message and adjust parameters | No, fix parameters first |
| 429 | Rate Limit Reached | Requests are too fast or concurrency is exceeded | Reduce request rate, add queueing/backoff, lower parallelism | Yes, after slowing down |
| 500 | Server Error | DeepSeek server issue | Wait briefly and retry | Yes, with backoff |
| 503 | Server Overloaded | High traffic overload | Wait briefly and retry | Yes, with backoff |
Safer retry strategy for API users
Use retries only for errors that can reasonably recover:
- Retry 500 and 503 after a short delay.
- Retry 429 only after slowing down.
- Do not keep retrying 400, 401, 402, or 422 until you fix the request, key, balance, or parameters.
- Use exponential backoff instead of tight loops.
- Log status codes and error bodies.
- Never expose API keys in client-side JavaScript, mobile apps, browser extensions, public repositories, or screenshots.
8. Why DeepSeek Works on One Device but Not Another
If DeepSeek works on your phone but not your laptop, or works in one browser but not another, the service itself is probably not the main problem.
Compare these variables:
- browser version
- browser extensions
- cookies and site data
- app version
- device storage
- operating system updates
- VPN/proxy status
- DNS settings
- network type
- login method
- account used
The fastest isolation test is:
- Try DeepSeek in a private browser window.
- Try a different browser.
- Try a different network.
- Try the same account on another device.
- Try another account only if allowed and appropriate.
If the problem follows the account everywhere, it is likely an account or access issue. If it follows one device, it is likely local.
9. What Not to Do When DeepSeek Is Not Working
Avoid these mistakes:
- Do not repeatedly spam retry during a server overload.
- Do not assume every issue is a global outage. Test another browser, device, or network.
- Do not download unofficial apps or APKs. They may expose your login, prompts, files, or API keys.
- Do not paste API keys into third-party tools you do not trust.
- Do not publish screenshots that reveal keys, account IDs, billing details, or private prompts.
- Do not keep retrying 401, 402, or 422 errors. Those usually need a fix, not another retry.
- Do not rely on old tutorials without checking current DeepSeek docs. API model names, limits, and behavior can change.
- Do not bypass workplace, school, or legal restrictions. Use an approved tool or ask the administrator.
10. When to Contact DeepSeek Support
Contact the appropriate DeepSeek support channel when the issue is tied to your account, billing, API access, or a persistent failure that you have already isolated. For general registration and account issues, the official FAQ lists service@deepseek.com. For DeepSeek API service issues, the official API documentation lists api-service@deepseek.com.
Support is appropriate if:
- your account shows a suspension message
- registration fails even with a supported major email provider
- billing or top-up does not appear correctly
- your API key fails after you confirmed the key, header, and environment variable
- 402 appears even though your billing looks funded
- the same login issue happens across multiple devices, browsers, and networks
- the same API error persists after you follow the official error-code guidance
For a temporary “server busy” message in the web chat, or an actual HTTP 503 response from the API, checking the official status page and retrying after a brief wait is usually more effective than contacting support immediately. Contact support if the failure persists after the official service status returns to normal and you have reproduced it across appropriate devices, networks, or API requests.
FAQ
Why is DeepSeek not working?
DeepSeek may be down, overloaded, blocked by your network, affected by browser/app cache, or failing because of an account or API configuration problem. Start with the official status page, then test another browser, device, and network.
Is DeepSeek down or is it just me?
If DeepSeek fails on every device and network, and the status page reports an issue, it is likely a service problem. If it fails only in one browser, app, or network, it is probably local.
Why does DeepSeek say “The server is busy. Please try again later”?
This usually means DeepSeek is overloaded or temporarily unable to process your request. Wait a few minutes, avoid repeated retries, reduce prompt complexity, and check the official status page.
How do I fix DeepSeek not loading?
Try a hard refresh, private/incognito mode, another browser, another network, disabling extensions, and clearing DeepSeek site data. If none of those work, check whether the web chat service is degraded.
Why can’t I log in to DeepSeek?
Possible causes include the wrong login method, expired cookies, browser extensions, unsupported email domain, temporary suspension, or service issues. Read the exact error message before troubleshooting.
What does DeepSeek 401 mean?
DeepSeek’s official API docs define 401 as an authentication failure caused by a wrong API key. Check your bearer token, environment variable, and whether the key exists in your DeepSeek platform account.
What does DeepSeek 429 mean?
DeepSeek’s official docs say 429 means you are sending requests too quickly or exceeding the applicable concurrency limit. Reduce request speed, lower concurrency, and add backoff before retrying. See our DeepSeek API rate limits guide for implementation and capacity-planning details.
What does DeepSeek 503 mean?
DeepSeek’s docs define 503 as server overload due to high traffic. The recommended fix is to retry after a brief wait.
Should I use a VPN if DeepSeek is not working?
A VPN may help with some routing issues, but it can also cause verification problems or violate workplace, school, service, or local rules. Try basic browser, app, and network checks first.
Is it safe to use third-party DeepSeek apps?
Use caution. Third-party apps, browser extensions, bots, and unofficial clients can expose your prompts, files, login session, or API keys. Use official apps and trusted integrations only.