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Matt, Mechanical Engineer
Category: Car
Satisfied Customers: 21982
Experience:  BEng hons Mech engineering, in auto industry 22 years
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one radiator fan stays on

Customer Question

one of my radiator fans stays on as long as my key is on. what should i look for to troubleshoot this problem. no codes

Submitted: 3 years ago.
Category: Car
Expert:  Matt replied 3 years ago.

I'd start by locating the fan temperature switch thats screwed into the end cap of the radiator

it'l lhave 2 or 3 wires running to it and switches the fan relay directly so if the switch is faulty the fans can stay on

bear in mind when you replace it you'll lose a little coolant so have some spare to top it up