One side heat issue
10-30-2019 | 06:55 AM
#1
Thread Starter
Newbie
Joined: Oct 2019
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2011 Mercedes Benz C300
One side heat issue
I have a 2011 C300. I recently used the heater for the first time this year. The driver side blows hot air but passenger side blows cold regardless of what setting it is on. Can someone tell me a what may be causing this issue?
10-30-2019 | 09:19 PM
#4
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,121
Likes: 1,753
From: V E G A S
1922 Ford Model T / no OBD
Use the same troubleshooting procedure that AC require.
Morning & cold redout will give you calibration values.
Beware of spammers who will ask for your personal data.
Morning & cold redout will give you calibration values.
Beware of spammers who will ask for your personal data.
Last edited by kajtek1; 10-30-2019 at 09:22 PM.
11-01-2019 | 09:52 PM
#5
Newbie
Joined: Nov 2019
Posts: 8
Likes: 3
From: Twin Cities, MN
2012 E550, 2017 Camaro SS 1LE, 2004 STI, 2011 GMC Sierra.
Blend door actuator could be dead (or door is stuck).
Temp sensor for passenger side has failed and is reading hot all the time.
the driver for the blend door in the HVAC control unit may have failed.
The wiring for the sensors/actuators may have shorted or opened.
my money is on the blend door actuator.
lots of variable to just guess at. best we can do is offer what what we have seen as most common failure points. For me, i find blend door actuators to be the weak link in any system by any manufacturer.
Temp sensor for passenger side has failed and is reading hot all the time.
the driver for the blend door in the HVAC control unit may have failed.
The wiring for the sensors/actuators may have shorted or opened.
my money is on the blend door actuator.
lots of variable to just guess at. best we can do is offer what what we have seen as most common failure points. For me, i find blend door actuators to be the weak link in any system by any manufacturer.
