Hy. Its only becoming 5,000 km on my Maruti Ritz and recently , the heating icon started blinking frequently whenever i turn it on. Some said it could be just a minor issue, but when i went to the service center they said that thermostat, or some part like that (i dont quite remember ) has to be replaced. Can that part get damaged so quickly? Or are they just saying coz they not sure about it?