 Don't save pennies to lose dollars. Our Central Air annual checkup only costs $85, and no one in town can beat that price. To get your AC unit service, go to truecomfortheatingandcooling.com to set up an appointment, where your service is always five-star guaranteed. News Radio 1310 KNOX AM, Grand Forks. 1079 and 103.3 KNOX FM. Translated on K239BG in Grand Forks and K277DN in Grand Forks.