I HAVE a 1991 Toyota Tarago GLI. When I use the dual airconditioning, the engine temperature starts to climb after about an hour. In hot weather, the temperature gauge goes into the red. I have asked several mechanics, auto electricians and radiator specialists about the possible cause of this problem.
IF IT takes an hour to reach the red zone, then it's unlikely to be the thermostat or the fan. It would be worth flushing the cooling system, checking the radiator, and refilling with fresh coolant. If that all checks out, you could consider fitting a larger fan.
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