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Greg, Technician
Category: Mercedes
Satisfied Customers: 7347
Experience:  Automotive diagnostic tech
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My phone just went haywire, I have asked the question but

Customer Question

Hi,my phone just went haywire, I have asked the question but ill repeat. The engine cooling fan runs on my 2001 Mercedes CLK220 even when the ignition is switched off and key removed. I've now disconnected ted the fan but I can still hear a relay clicking. We've had a lot of rain recently. Please help
Submitted: 2 years ago.
Category: Mercedes
Expert:  Shantal-Mod replied 2 years ago.
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Expert:  Greg replied 2 years ago.
Hi .
A few things can make this happen .
One is the Coolant temp sensor ,if this give a bad reading and makes the ECM think the engine is very hot the fans will stay on until it reads a cooler temp.
Most common is the Fan relay malfunction replace with a known good relay and recheck.
Still need additional information then please get back to me with the reply button, and not the poor or bad service, this way i can get back to you or suggest another expert if needed.
Your deposit does not pay me until the answer is rated in a positive way,
A bad rating does not constitute a refund.
If you are not happy or you have sorted out your problem before the answer then please let me know with the reply button .
Kind regards Greg.