DS18B20 module hang up ESP8266 ESP-12F?

The function getTC() is called inside its own definition, maybe that's why, you could try..

var ow = new OneWire(D14);
var sensor = require("DS18B20").connect(ow);
var cnt=1;
 
function getTC() {
sensor.getTemp(function (temp) {
console.log("Temp is "+temp+"°C : ",cnt++);
});
}
 
setInterval( function() {
if(sensor.isPresent())
getTC();
else
console.log('no sensor detected');
}, 1000 );

Does that work?