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Date: Sat, 28 Jul 2007 14:17:05 +0100
From: Andrew Sinclair <>
Subject: Re: Temperature gauge

In message <6pqqi.13231$>, John Bain <> writes >Hi, I'd appreciate any advice on the following problem which has recently >come up on my 1998 9-5 saloon SE eco-urbo 2.3ltr. 91k miles. >After only a few minutes driving the temperature gauge steadily rises to >just over >half-way whereupon the radiator fan kicks in. The temperature gauge then >rises or falls >slightly (to about three-quarters max, never goes into the red) but never >dips below half-way. After parking the fan continues for 5 - 10 minutes >before stopping by itself, with the ignition key out or in, makes no >difference. This happens daily now on even only a five minute journey. >The car has never behaved in this way before (had it for 5 years now) and >normally drives >with the temperature gauge holding steady at just over one-third of the way >up. Even motorway driving does not even take it fully up to half-way. First thought is your thermostat needs replacing, less than 20 quid in parts including new coolant. The temperature gauge on the 9-5 is controlled by the ECU so if all is well with the car it should sit bang on 9 o'clock and never deviate whatever you are doing, if the thermostat is sticking part closed so coolant isn't properly circulating around the radiator then the fan will kick in - don't worry about the fan running after you shut the car down, it is supposed to do that to cool the system down. Andy -- Andrew Sinclair

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