Scotty, my 2003 Audi A4 1.8t Quattro radiator fan doesn’t turn on. So my car overheats once I go over a certain speed. Can you help me with that. Jerome

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Techsus

Have you checked associated Fuses & Relays? Start simple. Walk through this tutorial Scotty published this week. Ignore PT Cruiser part & follow overheating thread. It's a brilliant piece of work: This PT Cruiser Has a Serious Problem from 13MAR2019