Heater After Battery Taken Out Help

[reeves1985]

In a follow up to my other thread I took the Battery out of my 220d to get it replaced

After being told It wouldn't be here until tommarrow I put the old Battery back on and re initialised the auto windows

But I have a problem when I start the car the front windscreen button with the orange light flashes for a while before the heater will function

Now I know this definitely did not do it before

Am I being stupid and is there something I need to do to get it to function correctly

The unit is the multimedia unit if that makes any difference

And the Battery was out of the car for over an hour

[normski2]

A wild stab in the dark. Found this out in the wilderness of cyberspace...may be relevant. Maybe the 'initializing process' needs to be done. Nowt to lose...give it a try.

Shout back if it helps. Its in the Owners Manual, think it was p.322

After recharging/reconnecting the Battery

In some cases, the engine may not start. Follow the procedure below to initialize

the system.

Shift the shift lever to “P” (automatic transmission) or depress the brake

pedal with the shift lever in Neutral (manual transmission), and turn the

“ENGINE START STOP” switch OFF.

Open and close any of the doors.

Start the engine. (If the engine does not start first time, repeat the procedure.)

[reeves1985]

I'll give it a whirl

It's definitely a strange problem since it only occurred after Battery was removed

[reeves1985]

Tried that still the same problem

I have noticed that when the ignition is off you can hear a noise like something is trying to do something a few times and if I wait till this has stopped the system works as normal but if I try again before the noise stops then I get the orange blinking light

[normski2]

Did you see this over on 'Heater Issue at Start Up' post?

May be of note

Had this issue last week, the main reason I noticed was the lack of air through the foot or air vents it was as if the selection had jammed on the windscreen setting. Also when you switched off you can hear the motors/servos driving/hunting trying to return to a position but not achieving it.

Not being able to take to the dealers and scared that a my satnav overide box had jammed in the mechanism I carefully removed the glove box etc to access the left side of the heater/aircon unit (which was the side the sound was comming from). After putting the unit into diagnostic mode.

Diagnostic mode.

Hode down the auto and r/f (recircirc/fresh) buttons together while putting the car in ignitio mode, all the lights on this panel should flash together 4 times. After the 4 times press the r/f switch and the unit should cycle through it modes. if you detect no change, mine was stuck on the screen defoggers then its a problem with the upper servo. Press the aircon off switch to get out of this mode.

Being of the adventurous disposition I removed the servo and checked its operation. I did take loads of photo's and marked the various gears and lever positions then jammed loads of bluetac in to keep this in position while I removed the plate holding the two servos.

What I found was the air selection servo main drive gear had was a few teeth out of sync and the levers driven off the second gear had jammed/jumped

.

Some 5 hours of head scratching and looking on the online workshop manual( which was no help) I worked out which position the levers had to be in and refitted the holding plate, without the servo so I could manually turn the gears to check the operation order. Once happy all was well I refitted the servos, reconnected the wiring and plugged in the AC controller. After removing the bluetac I did the above test and it worked also the flashing orange front screen light stopped and went into its normal green selection.

1 week later its still good. Do not try this at home, but could help point the dealers in the right direction when you take the car in.

[reeves1985]

Yes I saw the post and I posted in it hoping I would get a reply from the guy

The difference with mine is that the heater is not jammed on the front screen and returns to normal after a few seconds

Having said that it may be

I was just unsure as it only happened after the Battery was removed and replaced

I could do with finding out how to get to the part and what it looks like to see if I can fix it as above

I'm just a bit dubious as I have a third party warrenty that the car is going in to be diagnosed for a rough idle and stalling to see if its covered

I may just ask them to have a look at that as well