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[andy4775]

I have a omega 2.2dti  when left for a few days, flattens the battery, I have changed the battery so its not that.  But I have noticed that the fan is running all the time and even runs on for a few minutes after the engine is switched off.  I don't think it should do that but would it cause the flat battery?   Thanks

[Dave DND]

Try measuring the current drain when the vehicle is at rest, and if anything shows, try unplugging the power sounder first.

Don`t see the point of the "Poll" though ?

[Jimbob]

hello, and welcome, removed the poll, looked to be set up in error 

[andy4775]

Sorry about the poll (dont know what I did), just new to this forum.  Have tried to measure the drain by putting the multimeter in series but get no reading. May be using the meter wrong as I have just bought it.  What do think of the fan running all the time is that right?

[Dave DND]

Not uncommon for a fan to run for a good few minutes after a drive and the engine warm - if it does it from cold, then you may have a faulty sensor somewhere.

[Andy H]

What do think of the fan running all the time is that right?

At least one fan will run all the time the A/C compressor is operating.

On my facelift car there is a delay after starting the engine before the A/C compressor starts, I can stop it by pressing the ECO button.

I think the mini facelifts also have an ECO button.

[andy4775]

Mine is a 2.2dti and only has one fan, will try the eco button though.  But would the fan being on all the time have a hand in the flat battery?

[Dave DND]

If the fan is running 24/7 then yes, but if it shuts down after a few minutes, then your problems lie elsewhere.

You will need to take some accurate current readings using a clamp meter, a multimeter would not be good enough to perform this sort of diagnosis

[omegadti]

I have a 2.2 Dti and had the same problem a couple of years ago and I changed the battery and the problem continued until I got fed up jump starting it every other day - I had the "new" battery checked and it had a faulty cell - I put a new battery in and it is starting properly.   One thing though I had put electric leather seats in and there was a constant drain when I checked the poer on fuse 5 - remove the fuse no drain

[andy4775]

Mines the gls model and no heated seats, tried pressing the eco button and fan doesn't stop.  It is on from starting the car till I switch the engine off, will this drain the battery?

[andy4775]

What are the things that are most likely to be the cause of the fan staying on when the ignition is on??

[omegadti]

if the engine is running the alternator will put out more than enough power to run the fans etc without draining the battery - if everything is off when the key is out and the battery goes flat when the car is NOT running then there is either a drain on the battery or there is a fault with the battery.   I soldered a blown fuse onto a couple of wires and connected it to a multimeter, then plugged the fuse into all fuse sockets till I found the drain.  But seriously check the battery and the alternator first - it is normally the simplest solution that is the right one.

[Entwood]

Do the simple things first .... 

With the battery fully charged, leave it disconnecetd from the car for the same number of days. If it goes flat again it is a battery fault, if it is OK then it is a car fault... you can then start looking for the car fault ... not a lot of point if its a battery problem !!!!

[damage consultant]

Just a small thought I had a vectra 2.0dti same thing batt drain turned out to be the black ignition switch behind barrel was nacked.I tested this with batt from my senny which has sat 4 months it started.(senny started after 4 months)
after 3 days vectra wouldn't.

[andy4775]

I have already disconnected battery from car and tested it for a few days and its ok.  So its the car somewere but where?  Over the next few days will check the car over.  If I have a scale on my multimeter of 200mA that should pick up the drain??