Scavenger fan

[Ian65]

Anyone got any idea as to the tempature the scav fan should kick in? I was sat in traffic today and the engine temp sensor alarm went off I've got it set at 87 degrees, but the scav fan didn't come on so reset alarm to 90degrees. Would of thought it would come on before engine bay got that hot. Also does it suck the hot air out or blow cool air in

[g8dhe]

Blows cooler air up and over the engine housing, the coolant could get quite hot before the outside gets to hot as air will blow up and over in the normal run of things if there is even a little breeze.

[joca]

Hi, I am experiancing the same problem. It only started hapening during this wearher. Should go back to norm when the the weather changes

[Ian65]

Hi, I am experiancing the same problem. It only started hapening during this wearher. Should go back to norm when the the weather changes

Not sure it's the weather, I've never heard mine come on. Going to do some tests on it today to check its working

[mikeWalsall]

When I had mine MOTd recently while inside the garage they kept the engine running for quite a long time .. then speeded it up to do the emissions .. the scavenger fan kicked in then ..

[jaylee]

I fitted one of these a couple of years ago... http://igmaynard.co.uk/bongo/forum/view ... ning+light

Anyway, i have only ever seen the led flash about four times.. (I'n fairness, heard the scav fan aswell.) & always when starting the van after a 20 minute'ish break from a hot drive in summer when parked in a location with no air movement... It soon goes out when i pull away..

It is possible to trigger the fan sensor up by the hand brake with a hair dryer on hot to test the scav fan..!

[New Forest Terrier]

Only time I have noticed the scavenger come on is in a motorway services after a long run in hot weather. If I have the engine still on to close the sunroof, glass, powered and heavy, the scavenger fan comes on with quite a whumph.

I have my TM2 set at 96, which has never come on in use. In stationary traffic in weather like this, it can get to 92, but then drops down, probably scavenger again. Difficult to identify it from the aircon fan which is also going in these situations. This a V6 though so different to a diesel.

[Ian65]

Done some tests and fan is working ok, might put an inline switch in to turn on manually if needed.
Thanks for the comments, it's settled a little uneasiness I was having.
Reset my Tm4 to 92 degrees as well 85 wasn't high enough in this weather.

[corrour]

To put a manual switch in is easy.



Just cut the cables to the sensor
Join back together but with an extension in parallel (put bullets on so you can remove console if you mount switch in it)
Test and put seat back

John

[Darkstar]

mines set to 100 deg five degree above my highest temp reading so far that was in Devon up and down those hills.

[cavey]

To put a manual switch in is easy.



Just cut the cables to the sensor
Join back together but with an extension in parallel (put bullets on so you can remove console if you mount switch in it)
Test and put seat back

John

So, just to clarify, a short across the sensor should put the fan on? Thanks.

[corrour]

Cant remember wether it a short or open circuit but it works
With ign off it puts fan on for about 20 mins
With ign on it puts fan on and flashes coil light until you switch it off

[Northern Bongolow]

i understand why you think you may need to do this but im not sure its necessary, but thats another argument for another day.
the reason it puts the coil light on is because the ecu is seeing an electrical fault on the system, not sure this is a good thing.