My daughter's 1990 240 DL has an overheating problem. This only occurs when the outside temperature is 85 degrees +. The gauge will start to climb toward red but as soon as you turn the heater on, the gauge will return to normal range. I have replaced the radiator and thermostat. The water pump is also recent. There is no external electric auxiliary cooling fan and the existing fan attached to the water pump appears to be okay. Any suggestions?
Thanks,
oldiron
P.S.: My younger daughter's 91 240 has an auxilliary electric cooling fan and no overheating problems. Was this fan an aftermarket add on or a Volvo option?
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