A988 Passat GT 1800. Started to overheat, temp over 110 C and flashing lamp. Bottom hose cold top hose hot - changed thermostat. Symptom repeated, so removed thermostat. Car still over heats, fan not kicking in on slow speed until overheating. Replaced thermoswitch, fan still does not kick in until overheating, even then not always. Water level correct, so no leaks, heater works while engine running but goes cold shortly after engine off - suggests pump running. If short out fan so always on slow then it does not overheat even when driving arround town. Any suggestions, could temp guage be reading wrong i.e. temp sensor knackered or radiator partially blocked near thermosswitch. Both these difficult to confirm. Please help am getting fed up lifting bonnet and shorting out thermoswitch each time I drive the car. Oil temperature sometimed in 80's or less even though temp guage near 110.
- posted
20 years ago