QuestionQUESTION: i have a 02 dodge 1500,the defrost blows cool,,with knob set to vents the pass side blows hot, the drivers side blows cool.the temp switch is set to heat.
ANSWER: low coolant possible clogged up heater core or lines.
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QUESTION: coolant good, nothing clogged.
ANSWER: i doubt u have dual climate control do ya?
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QUESTION: no i don't,only does it with heat.vents work fine for a/c.when you switch to cold on vents,both sides blow cold.it's only when you switch to heat,theres a problem.
Answerthats the issue u cant have it blow cold both sides there is only one door that controls the heat and cold. If u get both sides cold the door is working and the motor is good u have a clogged heater core air bubble or something along that line. are both the heater lines the same temp or different to the touch?