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Parts for GE DCVH515EF0WW Dryer - AppliancePartsPros.com
Yes a broken belt will kill [power to the motor.
The unit has a belt break switch (Item 803 in the Blower & Motor Parts section.
I would check the drum seals, rear bearing, front support glides etc. for wear.
Might as well replace them when you have the un it apart if they need it.
Give the in terior a good cleaning, inclucing the blower wheel.
It is also a good time to check/clean your vent system.