07 Audi a3 1.9 TDI, fan has started to stay on after switching off engine

frank gallagher

it's only staying on for about 30-45 seconds, but its the 1st time ive noticed it, the temperature gauge is working fine, is this a common thing or is it the start
of something ?

Gazzmonkey

frank gallagher wrote: »

it's only staying on for about 30-45 seconds, but its the 1st time ive noticed it, the temperature gauge is working fine, is this a common thing or is it the start
of something ?

Mine did that once or twice in the last year, for me it was just an active regeneration that hadn't finished.

lau1247

yes i believe it is the mid of a regen process.. check the owners manual, it should say something on that

finalfurlong

Think its a feature of vw group engines My 132 Octavia does it on a regular basis but it does say in the manual that its due to stopping car in midst of active regeration of dpf.

ION08

Happened on my 1.9 TDI, fan would come on after engine was switched off.

It would come on at Full Speed about 5 minutes after the car had been switched off until it eventually sapped the battery.

Culprit was the fan relay.

Relay box is stupidly located under the drivers wiper and water can sometimes seep into the box and fry the relays.

My money is on the fan relay!

frank gallagher

ION08 wrote: »

Happened on my 1.9 TDI, fan would come on after engine was switched off.

It would come on at Full Speed about 5 minutes after the car had been switched off until it eventually sapped the battery.

Culprit was the fan relay.

Relay box is stupidly located under the drivers wiper and water can sometimes seep into the box and fry the relays.

My money is on the fan relay!

doesnt come on for that long about 30 seconds if that, from the time i take the key out till i get to my front door, then its off

ION08

frank gallagher wrote: »

doesnt come on for that long about 30 seconds if that, from the time i take the key out till i get to my front door, then its off

Doesnt have to come on for long. Any sort of erratic or unusual fan behaviour is nearly always down moisture in the relay/ecu box. (Google it)

If youre handy enough with a spanner open it up and have a look at least, it'll cost you nothing.

frank gallagher

ION08 wrote: »

Doesnt have to come on for long. Any sort of erratic or unusual fan behaviour is nearly always down moisture in the relay/ecu box. (Google it)

If youre handy enough with a spanner open it up and have a look at least, it'll cost you nothing.

id only break something else !!

how much would a relay set me back

ION08

frank gallagher wrote: »

id only break something else !!

how much would a relay set me back

Yeah it can be a bit tricky as wiper arm and a few plastic bits have to come off so dont try unless youre confident in your ability

Relay was around 40e from the dealer iirc.

frank gallagher

ION08 wrote: »

Yeah it can be a bit tricky as wiper arm and a few plastic bits have to come off so dont try unless youre confident in your ability

Relay was around 40e from the dealer iirc.

sound