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Re: ac/heater
warm your truck, and then turn on your heater on defrost or in any position. go under the hood and feel both intake and outlet hoses of your heater core. both
should be hot, if one is cool to cold( that would be your outlet hose) , then your heater core isnt cycling coolant
which is where you get your heat from. so you could
figure on blocked or air locked. what i did to mine was
disconnct both hoses, not from the core but the other ends, and flushed it with water hose. put water hose to the outlet to run it out the inlet(reverse flush).
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