Big cheats. Thug. Took Rs. 2200 for coil change and descaling. He took away the geyser for servicing to his shop. After re-installation, called me to say that some mistake happened by his personal during servicing and I should not turn-on geyser as it is a risk. After that I have been chasing this guy to fix the geyser. But he is not responding to calls. If only I had read online reviews earlier, I would have saved myself from this trouble.