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To me it sounds like your fan only run at high speed.
If the temperature rises and the fan kicks in, do the temperature continue to rise?
If the fan only run on high speed it is probably the resistor unit or the low speed relay that has broken
Do you have the wiring diagram?
If the temperature rises and the fan kicks in, do the temperature continue to rise?
If the fan only run on high speed it is probably the resistor unit or the low speed relay that has broken
Do you have the wiring diagram?