millsn Posted July 29, 2012 Share Posted July 29, 2012 No doubt its an earthing thing but why should my water temp read high (like 120 deg) and shoot down to 90 if I switch my heater fan off? Link to comment Share on other sites More sharing options...
johnv Posted July 29, 2012 Share Posted July 29, 2012 ha ha ... I found all my oil pressure back today when I switched the fan off .. saved me a fortune ( stack) Link to comment Share on other sites More sharing options...
Jonathan Kay Posted July 29, 2012 Share Posted July 29, 2012 What sort of temperature gauge? Does that only happen when you are moving through air or also at rest? Jonathan Link to comment Share on other sites More sharing options...
charlie_pank Posted July 30, 2012 Share Posted July 30, 2012 Gents, that sounds like you have an earthing fault. Probably worth getting to the bottom of it before it deteriorates to the point where the engine cuts out when you use the horn (see other thread from today!) Link to comment Share on other sites More sharing options...
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