this problem was reported by a dude from jallandhar(Punjab).
He drove his Indigo from the showroom and switched on defrost. The rear glass shattered.
Got replaced under warranty. Again this things happened. the workshop replaced the glass again under warranty and did some checking with the system which was found to be faulty. the problem did not come again.
though he was happy with Tata service, he wrote to autocar about this problem. Looks like the problem was due to defective defrosting system.
As for the temp difference argument. On a cold foggy winter morning, the outside temp would be something like 3-4 degrees, and inside the car it would be 10 degrees or so. Its in such conditions when rear defogging is used, the rear windshield temp would rise.
With AC on the inside temp would be something like 10 degrees too as below that ACs cut off. So that does not bite. Unless you have a defective defrosting system which changes the glass temp too rapidly, your laminated glass should not crack. |