When Hawke's Bay went digital last year there were people who waited until the last minute and then had to go without TV for a time because installers were fully booked," he said.
Every television must go digital to continue receiving pictures, as did DVD and video players.
"You don't need a new TV to go digital, but everyone will need a TV with Freeview built-in or the right set-top box, together with a UHF aerial or satellite dish."
Hawke's Bay and the West Coast were the first in New Zealand to go digital, last September. Mr Hartford said it was "a bit of a concern" that more than 8000 Wanganui-Manawatu homes were still unprepared..
Going Digital has appointed a community adviser to assist with the transition period. Robin Winter is working with community and service groups in Wanganui.
For more information on going digital, phone 0800 838 800 or visit www.goingdigital.co.nz