Tires with only 27K miles on them keep giving fals...

Tires with only 27K miles on them keep giving false indicator that pressure is low. Take the car in, the service writer re-sets the indicator. I have to do this every time or check the tires manually for pressure. "not their fault" Only one time the reading wasn't false and the tire actually was low on pressure which caused it to go flat. " not their fault" Service writer immediately argues with me that it couldn't be the problem, even though after changing the tire the indicator IS STILL ON. Terrible service, terrible attitude - not customer friendly in the least little way.