We replaced a failed Craftsman unit that lasted 15 years with a Liftmaster unit that has lasted 7. It won't maintain tension on the chain and there is a grinding noise coming from the motor. I've tried re-tensioning the chain and all the other suggested troubleshooting but I just think this opener is on the way out. Any brand suggestions for a standard suburban 16x7 foot door? I would also like to replace the door with an insulated one but the prices are way out there ($2,700 for R6.5).





