It happens that the electric fan does not turn off, even when its operation is no longer required. This usually happens if:
- stuck switch contacts (sensor). To make sure you're right, you need to disconnect one wire. A stopped fan is the best confirmation;
- Relay contacts stuck. This fault is checked by disconnecting the wires from the terminals «87» or 30/51». A stopped fan suggests that it is necessary to clean the contacts or replace the relay.