Mercedes radiator fan stays on. If the module is defective, it might be transmitting incorrect signals to the fan, leading to continuous high-speed operation. I've scanned for fault codes, everything is ok. I'v acquired an E220d w211 (2009) and have an issue with the radiator cooling fan constantly running even when the engine is turned off, this eventually will drain the battery. This happens with air con and all heating off. Has this happened to anyone? Any idea Jul 30, 2024 · Right guys, hope everyone is well. The fan doesn't stay on all the time after a drive; however, I noticed it this May 29, 2024 · Radiator Fan Keeps Running When Car is Off? Find out why it happens, what it means, and how to fix it before it leads to battery drain. Now, I know this is normal; however, the fan is still coming on even when it is freezing and driven exceptionally gently. When I send my vehicle in for repair work its for one of two reasons. It can therefore be SAM, ECU or Fan controller. as it would reach the 5 MIN mark it will slow down in stages. x4d pf gf8 c5gqbc 91if7wdnx 3cuh 9oiya re5d 3l zeqvnbh