Hello,
We have been using the T200 thrusters for about a year now and recently the thrusters started to get stuck, so we opened to see if the coil was rusted but instead we discovered that the core had 2 big cracks in it.
Hi @Uday, welcome to the forum 
Sorry to hear you’re having an issue with one of our thrusters. If you haven’t already, please contact our support team via our Product Problems form.
While this forum can be used to discuss product problems and the like with the community, the support form is our recommended approach to getting them resolved