Could be the fan relay stuck open, that's an easy fix I think. It's
near the radiator on my 90 escort, might be for yours. The other
possibility is the temperature switch threaded into the thermostat
housing, not sure if that was what you were referring to. Point being
I am trying not to confuse this with the ECT, or engine coolant temp
sensor, which feeds a signal to the computer rather than the fan
circuit. That one would be threaded into the heater tube under the
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