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Old Jun 15, 2015, 12:35 PM
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W204 - 2011 C300 Heater/AC issue

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Old Jan 11, 2015 | 11:24 AM
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2011 C300 4matic
Question W204 - 2011 C300 Heater/AC issue
Hello All,

Just wondering if any of you have encountered this issue on your C300. I searched the forums and it seems like this happened a couple times to a couple 2008 C300 but never on a 2011. I live in Michigan and right now it's bitter cold (10F). On my drive to work (7am) everything is great. Everything works, my car zips through the snow and my heater is working great. I come home from work (5PM) and no issues. Let's say I want to leave the house 1 hour later....and no heat. The control still work inside my car but no blower. I've checked fuses and spun the heater by hand (under the battery cover)....fast forward to 10pm when i'm on my way back home and all of the sudden starts working again (making it a pain in the *** as the Mercedes dealer will only fix something that is broken). What is going on!?!?!?!

Could it be that snow is melting and leaking on my blower motor and freezing? I have no explanation. I'll try to plead my case to the dealer and see what they can do. If you guys have any idea please help!

Thanks!
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Old Jan 11, 2015 | 12:22 PM
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2009 C63 AMG, 2010 C250 4Matic Sport
Does the blower spin fairly freely when you spin it by hand?
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Old Jan 11, 2015 | 12:42 PM
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Originally Posted by Funkwagen
Does the blower spin fairly freely when you spin it by hand?
Yes it seems like it does.
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Old Jan 12, 2015 | 11:42 AM
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2009 C300 4Matic Sport + Premium 2
I just had my blower changed. Sometimes it would simply stop giving me heat. I can't take this chance in winter!
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Old Jan 12, 2015 | 11:04 PM
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Originally Posted by RavenMDX
I just had my blower changed. Sometimes it would simply stop giving me heat. I can't take this chance in winter!
Yeah...got an appointment on wed at the dealership....hopefully they just change it without hesitation.
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Old Jan 13, 2015 | 07:37 AM
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2013 C300 4matic Sport
A lot of times, if the blower motor still spins w/o resistance, it is the blower motor regulator (resistor).
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Old Jan 14, 2015 | 09:57 AM
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Originally Posted by xjmoe83
A lot of times, if the blower motor still spins w/o resistance, it is the blower motor regulator (resistor).
Thanks for the input. I'll make sure to mention that to the dealer tomorrow.
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Old Jan 16, 2015 | 10:23 AM
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The dealer ended up replacing the heater and blower motor and the regulator. The guy said water got in there and it froze everything up...
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Old Jan 16, 2015 | 10:39 AM
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Originally Posted by wassupitaly
The dealer ended up replacing the heater and blower motor and the regulator. The guy said water got in there and it froze everything up...
Sweet! I hope it was covered under warranty!
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