imageCLASS MF232w new router communication issue, Wi-Fi light flashing

[Maestro1]

Spectrum/Charter recently sent me a new, super-duper router. I have connected it up, and everything seems working fine...EXCEPT that I now cannot use my Canon MF232w printer. The blue WiFi light on the printer keeps flashing. The router came with a new password, so I'm wondering if I need to enter this new password somewhere in the printer's settings. But where?!

[jrhoffman75]

Some printers operate on 2.4GHz WiFi and some newer routers only operate on 5GHz WiFi. 

[Maestro1]

Thank you! Is there a way to check whether mine is 2.4GHz or 5GHz?