pdaly Posted June 14, 2012 Report Posted June 14, 2012 I've recharged the Air con, only to find that it made a bit of difference, but not much. I have noticed that when the Air Con is on, the large Cooling fan on the front radiator is on constantly running (full blast after I've had the air con on for a while), when you switch off the AC button, the fan switches off. I;ve run an Air Con diagnostics check and this is what happened.... On the climate control I pressed the following buttons: Holding ‘OFF’ and ‘FOOTWELL’ for two seconds then pressing ‘AUTO’ – the fan speed indicator cycled up and down for a few times then the whole Air Con screen lit up and stayed like this. Pressing any button resumes to normal mode. Holding ‘OFF’ and ‘FOOTWELL’ for two seconds then pressing ‘A/C’ – this resulted in the display cycling through codes ‘77 DO’, ‘6F 04’ and ‘00 (with nothing on the LHS display)’. Pressing any button resumes to normal mode Holding ‘OFF’ and ‘FOOTWELL’ for two seconds then pressing ‘FOOTWELL'– this resulted in the whole Air Con screen lit up and stayed like this. Pressing any button resumes to normal mode. Does anyone know what these error codes mean?? Quote
pdaly Posted June 14, 2012 Author Report Posted June 14, 2012 Hmmm! I'm now wondering if those codes are just the Firmware version??? Quote
hung_mother Posted July 18, 2013 Report Posted July 18, 2013 The cycling codes are the firmware version; I can't find any information on a possible upgrade or error in the current version. I had my 2006 MK3 2.0 Tdci 140 re-gassed but that didn't help; the AC will kick out hot air on Max but no cold air on Lo.I also got the same results with the othe diagnostics; hoping this doesn't end up a £900 repair like some others have experienced!!! Quote
philce Posted July 20, 2013 Report Posted July 20, 2013 (edited) You have checked the pollen filter is not blocked? I had the same and the pollen filter was totally blocked, was twice the weight of a new one! Have you used a cleaner through it (de bug)? Could be the evaporator is dirty with mould?? Edited July 20, 2013 by philce Quote
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