Fan keeps running then next day car will not start as battery run down have replaced battery with new but problem persists car has run on long journeys so battery is well charged

its possible that the coils of the anternator are worn out.
then the batterie dont charge.take voltmeter and see if the engine,
is running ,if you read some 14.50 volts on the batterie is good.
if you read 12 or 13 volts is bad the anternator

it is your air idle control valve witch is located on the back of the throttle body..

Ultimate solution is change the battery... because the capacity of battery cells is poor.. this could be the reason if battery is old...
Still u can take a chance by completely removing the battery fluid and replacing it new battery fluid... but keep in mind that, after doing so, u'll need to charge the battery fully before using it in car...
This kind of battery problem is common in all diesel cars, the reason I think is, Diesel engine need heavy torque to start that draws heavy current from battery.. so if you are facing starting trouble for the vehicle, then battery is surely going to discharge frequently...
Still try the solution mentioned above and still the problem persists, then replace the battery with new one.
((I am considering that the battery you are having is 3-4 years old...))

if battery keeps running down. check the voltage across the batery posts while car is off.should be around 12.5 to13 volts. then with tester hooked up to battery, start the car. if alternator is ok, it while read about 14 volts give or take a few volts. if the gharging is low its a bad alternator or the drive belt.

You did not specify if the fan keeps running when u stop ur engine or the moment u start it. Try replace the thermostat and see, if it persists check for shorting wires. Good luck.

your charging system is working okay or you would have to have it jumped more than once a day.you have a bad battery that needs replacing as running it during the day the charging system keeps the battery charged up enough to work.you could have a drain on the battery from something in the car that is not shutting down that you will have to have checked out.or sitting over night the battery runs down to the point that it needs to be jumped started if its an old battery(over5-6years).

It is hard to confirm...as you are aware...your battery is draining when not running...First try turning off all power including the radio on your next shut off...If this does not work, The only drain is usually the starter has developed a short...replaced one...and fixed problem 100 %...(as long as everything else is properly shut down)...Hope this helps...nice car:)

Hi Jeepers,

The fan will occassionally continue to run for five or ten minutes after the vehicle shuts down. This is normal.

What is not normal is if it keeps running until the battery drains.

Does it just keep running?
If it eventually shuts off, how long does it take?
Did this just start happening?
The two days you mentioned, were they short trips, opposed to the third day?

If you would comment me back with some more details, it would help me help you.

Mike

The battery may need to be replaced, the battery is not holding a charge or you didn't run car long enough. Try boosting again and let the car run for about 1/2 an hour to 1 hr. Then try to start the next day. If it doesn't start you will need a new battery. Even when you don't drive this vehicle especially in the winter time you should start this car and let it run for about 10 minutes once every week. Good Luck contact me if you need more help