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Erratic rear heater blower |
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hezekiel |
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Joined: Mar 13 2018
Member No: #3469
Location: Next to Santa |
Hi all, My 2006 3.0 Exclusive has a habit of changing the speed of the rear passenger heater blower in a way that doesn't make any sense to me. It will go from almost nothing to MAX and back suddenly and everything in between without any user input to any of the heater controls. This is usually worst during in the first 10 minutes from start, hot or cold but can happen after a long cruise. I hope that it isn't programmed to work like that but I have only experience from this one C6 only. Are they all like that or is there a fix? |
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C6Dave |
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Member No: #1
Location: Northumberland |
Have you got it set to 'Auto' mode? | ||
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hezekiel |
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Joined: Mar 13 2018
Member No: #3469
Location: Next to Santa |
Yes, it is set to AUTO. Almost seems to me that it is an intermittent failure in the circuit that controls the fan speed. Is there a description of this system and the component locations available? | ||
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C6Dave |
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Member No: #1
Location: Northumberland |
hezekiel wrote ... Is there a description of this system and the component locations available? Air Con Wiring schematic is available for LHD cars - Click Here - It may be a temperature sensor, have you checked for any error codes via the OBII port? |
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lee_marshuk |
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Joined: Feb 12 2014
Member No: #1584
Location: West Midlands |
Not much help I know, but mine has always done this, I have experimented with different modes but it's made no difference. No error codes for me from the OB port either! | ||
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Pracli |
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Joined: May 22 2018
Member No: #3537
Location: Budapest |
Hi, I have same issue. I found, that passenger side blown air temperature is -33C, which can be a broken NTC... Anyone knows where is the passenger side blown air temp sensor? ( I am talking about EU version, left hand drive ) |
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joopajaa |
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Joined: Sep 06 2017
Member No: #3261
Location: Byroslavia, FIN |
Mine has also now a quite lot of RPM after starting the car but I think it has to be linked with now failed right side heater flap (only warm air air from right). I think this started at the same time as the flap failed. | ||
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Pracli |
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Joined: May 22 2018
Member No: #3537
Location: Budapest |
The erratic blowing starts after appr 10min I do not have any errors in climacontrol The driver side I found near by throttle, but that is OK Passenger side temp measure is extremly low, that can cause inconditionally heating on that side Has anyone experience regarding position of pass side temp sensor, or can help on decode this behavior... |
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