the car only cools when we are going about 40=50 miles per hour
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2005 Mercury Montego
Question: if both fans are working behind the radiator, why wont the car cool when idling
Answer #1Palo Alto Shell from Palo Alto Shell, July 05, 2012, 16:30Enthusiast
You might have a clogged radiator, or possibly a water pump impeller going bad. Check to be sure nothing is blocking the radiator inside the grill area. Also turn on your heater and see if you get hot air coming out if so then you you know you are getting some circulation.