A couple of things you should to check before removing the heater core because you have to remove the dash first. If the actuators are working check to make sure the vents actually move and are not broken. Also, the hose that is cold attach a water line to that and disconnect the hot hose and put into a suitable container, blow the heater core out with water not air as this will flush it out, then try and see if it gives heat. Also, check for air in system as you could have an air lock in it.
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Thursday, October 17th, 2013 AT 4:07 PM