Hi my name is ***** ***** I will be the expert working with you today to help and resolve the problem you have posted.
I am sorry to know that you are facing problem with your printer working on wifi.
Try to uninstall the currently installed printer driver from the computer and then restart it, Reinstall the printer driver using wifi and not usb to make it wirk on the new modem.
Remote Connect Service - Quick Resolution
Remote access is an optional additional service offer with a minimal one-time flat fee ($12). It is 100% safe which will allow me directly work on the problem and can be fixed quickly, you can sit back and watch your screen while i fix it for you. Let me know if you need the additional service or else we can continue with the service you have already opted for.let me know if you want to opt for remote assistance.
In case it has not worked by following the steps i gave, reply me back and i will assist you further.
Every time you change a location or try to connect to a new router the computer and the printer has to be patched one time and it save the wifi settings on both the devices.
So the next time you change locations the computer and the printer will automatically detect the router and will be ready to function.
i can configure the printer to the new router by remote access let me know when you are ready.