New battery now fan on start up? HELP
 

I have just replaced my battery, now when i turn the ignition on the fan cuts in and starts wuring this is when the car is cold not ever running what have i done? have i Moved something near the battery ? Relay?

Charlie

It also cuts in and out when engine running and idea people?

Charlie

not sure what year your car is but sounds like youve got it in d check mode,mines a 94 wrx and if you connect the two green connectors under the steering column then this will make the fans kick in and relays/solenoids go through there motions, not sure how the battery would affect this tho

would it help if i did a ECU reset? aggg its annoying me so much a "simple" battery swap....Keep the ideas coming....

Charlie

Its an 54 plate STI

54 plate STI

is the aircon switched off when you start.

water coolant sensor?I now a faulty one can cause the fan/fans to activate on start up.

yes im pretty sure it was off....

Charlie

Would this break after a bettery change though? where and how can a check it?

Charlie

I only say because mine does the same if the aircon is on ,i have no idea why .
03 uk sti

hummm i will double check first thing to make sure it was off.............you never know. finger crossed though

Charlie

Do the fans when the engine is running with the AC on, click on and off. On for maybe 10 sec then off for a bit?

Charlie

.I was concerned when as soon as i switched the ignition on one fan would start straight away ,anyway i found when the aircon was switched off it didnt do it.It didnt cause me any more concern so havent payed it much attention since .
Sorry thats all i know.

Well thank you for your input people least it gives me some things to check.

Cheers Charlie