French Polynesia's public radio broadcaster says people in remote locations have complained about the end of transmissions on its AM frequency.
Radio Polynesie Premiere switched to an all FM service at the beginning of December, leaving pockets of inhabitants in valleys and on remote atolls without any local radio service.
The broadcaster added five FM transmitters to its network of 48 to improve its reach but in an area the size of Europe, the signal fails to reach all communities.
Concern has been expressed that vital weather warnings are no longer heard.
The mayor of Makatea in the Tuamotus Julien Mai said there is a risk to public safety because people have always been advised to have an emergency kit that includes a radio when severe weather strikes.
Mariners can still receive weather updates via radio.
