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Thread: Engine off and key out - fan still running

  1. 23rd July 2016, 06:52 PM #1
    Entropic
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    Engine off and key out - fan still running

    So I jumped in the td5 this afternoon and did a quick 10 min drive down to the chemist. Parked, turned car off and went into chemist for a good 5 minutes. When I got back to the car I noticed the noise of the fan and running. Got in, turned the ignition on and it stopped - is this supposed to happen as part of some cycle and I've never noticed it before or is it something wrong?

    Thanks for your help
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  2. 23rd July 2016, 07:00 PM #2
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    Pinelli
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    Yep. Disco (and many cars) will do this when the engine temp is too high. Helps to cool it down.

    You had any problems with the engine overheating?
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  3. 23rd July 2016, 07:06 PM #3
    geordiepride
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    sticking relay relay is located under the bonnet normally you need to clear codes but if you say the fan was still running while parked up a 10 minute drive the engine wont get even close to hot
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  4. 23rd July 2016, 07:09 PM #4
    Entropic
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    only a brief stint when the viscous coupling on the fan **** itself. Temp didn't seem particularly high and the ambient is only 13 degrees. Was a 10 min drive at 80km.

    Might be time to invest in a temp gauge.
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  5. 23rd July 2016, 07:30 PM #5
    Entropic
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    Dont suppose anyone knows the cut in temp for the fan?

    Just plugged the nanocom in when I got home and its reading 103 degrees for coolant temp, which is on the high side.

    Might have to look at the car tomorrow, seems a bit high for a short drive.
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  6. 24th July 2016, 11:36 AM #6
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    Fluids
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    I believe cut-in is 100 deg C .... or it's on when the A/C is engaged.

    103 for a short 10min drive seems abnormally high.
    Kev..

    Going ... going ... almost gone ... GONE !! ... 2004 D2a Td5 Auto "Classic Country" Vienna Green

    2014 MUX LST with fruit
    2015 Kimberley Kamper "Classic"
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  7. 24th July 2016, 02:47 PM #7
    geordiepride
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    also check water flow ie water pump


    also check thermostat


    try and compare readings with another gauge could be possible that the coolant sensor has failed
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  8. 24th July 2016, 05:15 PM #8
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    sierrafery
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    the fan kicks in when the ECU gets 110*C input from the sensor and stops at 105, the gauge goes to middle at 70*C and goes up further only at 120, not some brilliant engineering cos you can drive it for long at 109*C without even knowing it and this would ''tenderise'' the injector seals.... fit an auxiliary gauge to be on the safe side and try to stop the viscous fan with a rolled newspaper when the engine is hot, if you can stop it you need a new one
    Discovery Td5 (2000), manual, tuned
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