Cold Starting issue but not battery?
Last year during the two very cold weather spells we had in the UK my 2015 1.4 multiair wouldn't start. On both occasions the car had stood for a few days and as it was still under warranty I called Alfa Assist who, on both occasions jump started the car, ran it for 10 to 15 minutes, suggested I charge the battery and gave it a clean bill of health.
Since then all has been well until last Friday when the same problem occurred. Again the car had stood for 4 days but although the weather was cold it was not sub-zero and nor had there been sustained cold weather. As it's no longer under warranty I charged the battery and it then started although a little reluctantly. After a 30 mile run it is now OK and I took it for a free battery health check today. 'You don't need a new battery mate' was the outcome as the battery passed all the tests as did the alternator.
When the problem occurs all accessories have power and the battery doesn't appear to be low on charge its just that despite trying the engine just doesn't start. The only other thing is I can't extract the key from the ignition.
Despite the battery passing the tests I have lost confidence in the car starting during cold weather and as I'm due to park it at an airport for a week In February I'd really like to get to the bottom of the problem.
Does anyone have any suggestions please?