Had radiator replace. No leaks, but having to add coolant everyday. 6-8oz. Each day. Little mileage.

Not overheating, but engine fan is not turning. Except on heat. New radiator is needing coolant. No leakage found on engine or ground. What's my problem? Also, Had lifter ticks. Had oil changed, even though I was full on oil. No more ticking. Also had engine flushed same time as rad. Changed.