This is a problem beginning 2 years ago when temperature is in 40s and 30s.
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2004 Toyota Highlander Question: I must drive 12-15 miles before the heater produces warm air. What is the proble
Answer #1G. T. Service Center (2268 Answers) , Stephenville, TX - (254) 638-3236ProfessorG November 12, 2013, 12:03Master
Just a thought; Try putting a piece of cardboard or ? in front of your radiator to block some of the cold air, (like 18 wheelers do). Or change your thermostat.
Answer #2lightsaber November 12, 2013, 14:55Technician
I agree with ProfessorG. Replace the thermostat and gasket with Toyota OEM parts. call a dealership for the part numbers, and check ebay.com for better prices!