No Heat C350 2009 - Blower Heater Spins
Thread Starter
MBWorld Fanatic!
Joined: Jun 2007
Posts: 1,022
Likes: 44
From: Los Angeles, CA
2015 C400 Tenorite Gray
No Heat C350 2009 - Blower Heater Spins
I have a 2009 C350 with 86,200 miles. Temp is above 80. I took the cover off over the battery and the motor spins and the cover down.
Just cold air coming into the cabin.
Q. Is there another flap somewhere that could be shut? Any help is appreciated. Thanks
Just cold air coming into the cabin.
Q. Is there another flap somewhere that could be shut? Any help is appreciated. Thanks
Super Member
Joined: Aug 2016
Posts: 520
Likes: 45
From: Regina SK
2008 C-230 4Matic Sport
Could be time for a new thermostat and a coolant flush.
Any car I have owned, when the heat stops blowing the culprit is usually a thermostat gone bad.
If you can DIY stuff a thermostat change is about a 2 hour job. More if you take your time, have a beer or two, ect ect
You will save hundreds doing it yourself.
Hopefully it is something simple but I am betting on a bad thermostat.
Any car I have owned, when the heat stops blowing the culprit is usually a thermostat gone bad.
If you can DIY stuff a thermostat change is about a 2 hour job. More if you take your time, have a beer or two, ect ect
You will save hundreds doing it yourself.
Hopefully it is something simple but I am betting on a bad thermostat.
Last edited by Colin G; Nov 23, 2016 at 11:36 AM.
Thread Starter
MBWorld Fanatic!
Joined: Jun 2007
Posts: 1,022
Likes: 44
From: Los Angeles, CA
2015 C400 Tenorite Gray
Could be time for a new thermostat and a coolant flush.
Any car I have owned, when the heat stops blowing the culprit is usually a thermostat gone bad.
If you can DIY stuff a thermostat change is about a 2 hour job. More if you take your time, have a beer or two, ect ect
You will save hundreds doing it yourself.
Hopefully it is something simple but I am betting on a bad thermostat.
Any car I have owned, when the heat stops blowing the culprit is usually a thermostat gone bad.
If you can DIY stuff a thermostat change is about a 2 hour job. More if you take your time, have a beer or two, ect ect
You will save hundreds doing it yourself.
Hopefully it is something simple but I am betting on a bad thermostat.
Thread Starter
MBWorld Fanatic!
Joined: Jun 2007
Posts: 1,022
Likes: 44
From: Los Angeles, CA
2015 C400 Tenorite Gray
It's likely the Heater Control Valve. Damn. This W204 is even less reliable than my W203.
http://www.pelicanparts.com/techarti...placement.html
part for my car is
http://www.mboemparts.com/mercedes-b...-control-valve
http://www.pelicanparts.com/techarti...placement.html
part for my car is
http://www.mboemparts.com/mercedes-b...-control-valve
Last edited by Nicholi2007; Nov 23, 2016 at 08:28 PM. Reason: addendum
Super Member
Joined: Aug 2016
Posts: 520
Likes: 45
From: Regina SK
2008 C-230 4Matic Sport
I'd be happy personally if it is the heater control valve and not a thermostat.
Much cheaper and easier to replace the valve than the thermostat.
I mentioned a coolant flush earlier since if you are removing and replacing a thermostat, you may as well flush and put new coolant in.
Much cheaper and easier to replace the valve than the thermostat.
I mentioned a coolant flush earlier since if you are removing and replacing a thermostat, you may as well flush and put new coolant in.
Thread Starter
MBWorld Fanatic!
Joined: Jun 2007
Posts: 1,022
Likes: 44
From: Los Angeles, CA
2015 C400 Tenorite Gray
I'd be happy personally if it is the heater control valve and not a thermostat.
Much cheaper and easier to replace the valve than the thermostat.
I mentioned a coolant flush earlier since if you are removing and replacing a thermostat, you may as well flush and put new coolant in.
Much cheaper and easier to replace the valve than the thermostat.
I mentioned a coolant flush earlier since if you are removing and replacing a thermostat, you may as well flush and put new coolant in.
I've have a lot of parts fail and I'm not even at 100K yet.
