voice message indicator light blinking after voice messages have been deleted

Hello @user_e5e8c9, I hope the day has been treating you well! Thanks for taking the time out of your day to post here with us in the Xfinity Community Forum. 

If you have Xfinity voicemail feature, dial *99 from your Xfinity home phone, when your voicemail picks up, press # and enter your Xfinity Voice passcode (a 4-digit PIN). If your Xfinity voicemail is empty, then this is more than likely related to the actual phone. There may be a voicemail feature on the phone, or maybe a notification etc. If by any chance you have your phone manual, I'd recommend checking for more information.