Printer keeps losing connection after a day

[Chemist1977]

My printer has always been working well over wifi, but since a month or so it loses its connection after a day or so. I then have to switch off the printer and on again. Then it is working, but next day it has no connection again. I have restarted the printer, the router, accesspoints. Tried 2.4GHz and 5 GHz, fixed IP. I have even reset my printer to factory default. Nothing helps. HP smart app cannot find the printer. But when I have restarted the printer, HP smart app cannot find a problem.

[VikramTheGreat]

Hi @Chemist1977,

Welcome to the HP Support Community.
 

Thank you for posting your query. I will be glad to help you.

I can imagine how frustrating this is. Your printer works perfectly after a restart, but then goes silent the next day. This behavior usually points to sleep mode or network lease issues rather than a hardware fault. Here’s how to fix it:

Why It Happens

• HP printers often enter Deep Sleep or Energy Saver mode and fail to wake properly.
• DHCP lease expiration can cause the printer to lose its IP address.
• HP Smart relies on the printer being online, so when the printer drops off the network, it disappears.

Step-by-Step Fix

1. Assign a Static IP (Even if You Tried Before)

• On the printer:
  Setup → Network Settings → Advanced Settings → IP Settings → Manual
• Use an IP outside your router’s DHCP range (e.g., 192.168.1.250).
• Save and restart the printer.

2. Disable Auto Power Off

• On the printer:
  Setup → Preferences → Auto Power Off → Off
• Also, check Sleep Mode and set it to a longer duration or disable it if possible.

3. Update Printer Firmware

• Go to HP Support:
  👉 HP Printer Firmware Update
• Install the latest firmware (fixes connectivity bugs).

4. Router Settings

• Enable DHCP Reservation for the printer’s MAC address.
• Disable AP Isolation or Client Isolation if using access points.

5. HP App

• Remove the printer from the HP app and re-add it using the new static IP.
• Ensure Local Network Access is enabled in iOS/Android settings.

📌 HP Official Guide:👉: HP printer is offline or unavailable | HP® Support

I hope this helps.

Take care and have an amazing day!
 

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Regards,

VikramTheGreat

[Chemist1977]

Thanks for your suggestions. 
I have entered a fixed IP address in the printer. I assigned the same IP address in the router for the printer, just to be sure. 
Auto power off cannot be disabled, but I changed the sleep mode tintje longest time.
Firmware is th latest version

Local network access is ok. I can print from my iPhone as long as the printer is online.
Client isolation is disabled in my WiFi.

unfortunately, the problem is still there. Printer works for a while but after a day it loses its connection. In the router logging I can see a sudden stop in network activity. 

[VikramTheGreat]

Hi @Chemist1977,

Thank you for getting back and letting me know that you still have trouble after trying all the steps.

To get you further assistance, we need to take this conversation to a private chat. We're inviting you to a private message to protect your privacy and ensure that any sensitive information remains confidential. 

To access your private message, just click the little blue envelope icon on the upper right corner of your HP Community profile, next to your profile name.  

We're looking forward to helping you resolve this issue! 

Stay tuned, and thanks for your patience! 

VikramTheGreat

HP Support