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OVERHEATING 406 1.9TD WITH Air Con.

Gents I have noticed that my temp gauge that use to run at just below 80 all the time now registers between 80 and just over 90 when the engine is working hard i.e. going up hills. I wondered if the airflow could be a problem so took a look at the fans. The temp quickly restores to below 80 after the fan has been working for a few minutes.The passenger fan seems to work when the engine temp goes over 85 but not the drivers side one does not seem to come on. I have 2 questions

1) Where are the fan relays located ? 2) What is the sequence of operation for these two fans as I can find no switches on the radiator to switch them on and I suspect they may be controlled from the engine ECU Mike
Reply to
MIKE ROCHE
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The above behaviour sounds normal, especially when you have multiple fans. It'll run one or two, perhaps at different speeds, when it needs to. It's also perfectly normal for the engine to warm up when you're working it harder - but it's not overheating unless the coolant temperature extends into the red (which will be at least 100°C, probably more).

More than likely, they're controlled by the ECU. I don't know the sequence for the 406, but does a fan run with the air conditioning switched on? On every air conditioning car I've encountered, it's normal for the fan to be running when you use the air conditioner, since the condenser needs to be kept cool.

Reply to
DervMan

Reply to
MIKE ROCHE

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