Seat Ibiza overheating

Car: Seat Ibiza
Variant: 1.4se manual
Model Year: 1997
Categories: Leaks & Noises
when my heater is on hot air n is going full blast my car doesnt seem to overheat but wen my heater is turned off my car overheats dramatically what could this be?
Posted: Aug 25, 2009 (15 years ago)
firts check that the thermostat hasnt collapsed, if all ok look towards head gasket
Posted Aug 25, 2009 (15 years ago)

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