Most fireplaces like the Greystone 32" Electric Fireplace with Crystals - Recessed Mount - Black Item # 324-000076 have an overheating protection setting that causes them to turn off to prevent a fire or other damage to the fireplace. This can be fixed by unplugging the fireplace from the outlet for 15 minutes to hard reset it. While it is out I recommend cleaning the vents on the sides and back with compressed air to make sure no dust is clogging up the motor.
If this doesn't fix the... view full answer...