Just nipped out at lunch time and went about 2 miles up the road. When i pulled into the car park the fans stopped on for a good 30secs after i got out the car. The same happened on the return journey - oil was only up to 67C and aircon wasn't on.

any ideas on this? Will see what its like later going 20miles down the motorway.

Just nipped out at lunch time and went about 2 miles up the road. When i pulled into the car park the fans stopped on for a good 30secs after i got out the car. The same happened on the return journey - oil was only up to 67C and aircon wasn't on.

any ideas on this? Will see what its like later going 20miles down the motorway.

Mine does exactly the same thing. Has done since new. It has done 13K now. Mine is a CR VRS. They seem to stay on for ages, much longer than 30 seconds. It seems odd because it will occur after a short journey at times.

I just put it down to a quirk of the car, seems not to have done it any harm. I have had four Octavia's now and none of the others did this in this manner.

Well it didn't do it when i got home. This seems a bit strange the fans stopping on for ages when the engine is cold. This is a recipe for a flat battery.

Just nipped out at lunch time and went about 2 miles up the road. When i pulled into the car park the fans stopped on for a good 30secs after i got out the car. The same happened on the return journey - oil was only up to 67C and aircon wasn't on.

any ideas on this? Will see what its like later going 20miles down the motorway.

My 05 2.0Tdi 140 does the same, but only if the climate control is switched on......

Cheers,

Diggers

Ive had it happen to mine aswell. I was told it was nothing to worry about. :S

Hi,

This is perfectly normal and is in fact part of the current Diesel Particulate Filter's regeneration cycle, you may also notice a nasty plasticy burning smell coming from the exhaust and the idle speed running slightly higher than normal. This will occur once every so often to burn off the soot particles trapped in the filter. The fans stay on to help reduce the increased temperature of the exhaust gases needed to burn this soot off.

Hope this helps.

Jon

After 2miles? surely wouln't be up to temp to do a regen? Also I do 40miles a day on the motorway and i don't hang about so should not be doing a regen cycle!

Good point however it doesnt matter how short your journey, once regen starts it will continue until the soot is burnt off. If you do 10 x 1 mile journeys during the cycle it will still try to regen, the ECU doesnt know how long your journey is going to be. Also doing 40 miles a day doesnt guarantee you wont get regeneration of some sort, I'm not talking about the full "light illuminated on the dash and reduced power" regen (this only occurs once the soot level builds up to a certain level in the filter), this is more of a mild cycle to prevent build up in the first place. There is a post somewhere regarding the actual % soot in the filter and what the ECU does to rectify it.

Over the last 2 years my fans have ONLY ever stayed on after the engine has been switched off during one of these "mild regens" and I have never suffered from a flat battery because of this.

If you are still concerned then you are best to take the car back to your dealer for a check over.

Edited 26 August, 201015 yr by Altifox