Disconnect the black fan connector and two temperature sensor connectors from the logic board by pulling/prying them directly up.

Don't try to slide the connector plugs out of their sockets, in the same plane as the logic board, since that may break them.

If you have a MacBook Core 2 Duo Santa Rosa/Penryn/Early 2009, there is only one temperature sensor.

The heat sink in early 2009 MacBooks may look slightly different.