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Q: overheating on 1992 Mercury Cougar

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the water pump is good, antifreeze is good. but after i drive for a few minutes it overheats no warm air coming from the heater. is the thermostat stuck or could this be a heat sensor bad?
(1) Answer
It is most likely to be the thermostat, but could be a sensor. You could try the thermostat first. It may be best to confirm with a professional diagnosis before replacing parts.