rad fan not stopping

[slipar]

hi all neo owner..
my friend car got some issue..
car is neo 1.6 auto with no mod..
got some issue about the cooling system..
is it normal for the fan to run non stop when engine reach operating temp..
before reach operating temp fan not running..
but after reach operating temp fan run non stop..
if on air cond before reach operating temp fan run n stop but after reach operating temp fan non stop run..
is it normal or maybe the cooling got some issue..
change thermostat n water temp sensor alr..
thanx in advance..

 

[cfphoon]

probably need to do air bleeding on the cooling system

 

[slipar]

probably need to do air bleeding on the cooling system

done that while change new thermostat..
thanx cfphoon..any other suggestion..
some pomen said comp box got problem..

 

[crazykatak]

on average, when cooling system was bled properly..fan would run on average of between 25 - 33 seconds on a hot day.

 

[slipar]

but the fan run non stop after reach operating temp..
no interval what so ever..just run non stop..until key switch off then the fan stop..

 

[crazykatak]

but the fan run non stop after reach operating temp..
no interval what so ever..just run non stop..until key switch off then the fan stop..

the thing is, was the cooling system properly bled ?

 

[xtremeleo]

he said yes, and i dont think its about air in the system..

 

[slipar]

the thing is, was the cooling system properly bled ?

he said yes, and i dont think its about air in the system..

yes the cooling system bled properly..thanx bro xtremeleo..
try to change the relay for rad fan also same..

 

[crazykatak]

weird..

 

[slipar]

weird for me also..
not many friend use campro engine so ask here loh..
no choice but to go pdt for now..
hope nothing serious..

 

[crazykatak]

yup, i was about to ask you. have you done diagnostic test ?
share the results..

 

[sam8888]

my neo had the same problem also...after i switch off da key,the rad fan wont stop it...after 5 or 10 minutes just stop it...whats the problem??

 

[slipar]

done pdt..no prob on all sensor..
but the pomen that done pdt remove thermostat then fan normal..
that pomen said no thermostat better..wtf !!!..
now temporary running without thermostat..
pic attach show temp after driving about 4km..
* sorry for the blur attached pic

 

[xtremeleo]

dont run it witout a thermostat, the fan not switching off right after the engine has stopped operating is normal, most contis are like this iirc. if its not turning off langsung, then there wud be a problem. iam suspecting a faulty temperature sensor, or a faulty thermostat. for ur case, get a new thermostat

 

[Izso]

slipar, has your friend tried a complete ECU reset? Ie- take out the battery terminals and leave overnight and then plug it in the next day?

 

[slipar]

dont run it witout a thermostat, the fan not switching off right after the engine has stopped operating is normal, most contis are like this iirc. if its not turning off langsung, then there wud be a problem. iam suspecting a faulty temperature sensor, or a faulty thermostat. for ur case, get a new thermostat

i know that not good to run without thermostat..that why when that pomen said better to run without it make me wonder is this pomen know what he said or not..pomen from a well known campro workshop..i also suspect that water temp sensor making this problem bro extremeleo..thermostat already change 3 unit from diffrent brand alr but all same working temp..could not find low temp thermostat for now..thanx for the advice bro extremeleo..

slipar, has your friend tried a complete ECU reset? Ie- take out the battery terminals and leave overnight and then plug it in the next day?

thanx bro izso..i dont think reset can solve this..bcos remove thermostat the rad fan working normal..but it no harm trying it also..will inform my friend to try this..will update the result later..

 

[xtremeleo]

if the water temperature sensor is at fault, it will switch the fan on indifinitely ie it wud run as long as the engine is running, for safety reason. i suggest u check the wiring for this sensor first before changing it

 

[slipar]

if the water temperature sensor is at fault, it will switch the fan on indifinitely ie it wud run as long as the engine is running, for safety reason. i suggest u check the wiring for this sensor first before changing it

while thermostat still in..rad fan not run while engine run..
but after reach operating temp then fan run non stop..
will check wiring 1st..water temp sensor not cheap to replace i think..
thanx again bro extremeleo..

 

[nadziad]

hi all neo owner..
my friend car got some issue..
car is neo 1.6 auto with no mod..
got some issue about the cooling system..
is it normal for the fan to run non stop when engine reach operating temp..
before reach operating temp fan not running..
but after reach operating temp fan run non stop..
if on air cond before reach operating temp fan run n stop but after reach operating temp fan non stop run..
is it normal or maybe the cooling got some issue..
change thermostat n water temp sensor alr..
thanx in advance..

mayb got leaking on the radiator hose.....mine also got the same problems....usually got leak on the hose near the intake....

 

[J Neo]

bro.. this problem happend to me once.. try change your rad fan relay. the relay is in big fuse box in the engine bay.. work for me..