Thread: Heater blows cold when set to hot and blows hot when set to cold??????

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  1. #1 Re: Heater blows cold when set to hot and blows hot when set to cold?????? 
    I live here. 02NavyBlue's Avatar
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    Also it may have started blowing hot on cold momentarily because the area where cool air is grabbed from was hot from the engine running, but should have cooled off after a bit. After you turned on the ac and it cooled, go back and try the first thing again and see if it was just temporary.
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  2. #2 Re: Heater blows cold when set to hot and blows hot when set to cold?????? 
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    Hi, thank you for the advice. I appreciate your help. I think you are correct about pulling the heat from the Engine as now it only blows cold no matter the setting. I put in a new blend actuator just to make sure that the original one wasn't the issue and it had no positive effect. The actuator is definitely working. I physically moved the blend door by turning the knob with the actuator removed and it didn't seem to matter if it was open or closed as it still was pulling cold air. I double checked the hoses going in to the heater core and again both are hot. Is there another actuator that would effect the air flow through the core?
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  3. #3 Re: Heater blows cold when set to hot and blows hot when set to cold?????? 
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    Update. . I had an air pocket in the heater core. Flushed the system and now everything is working great.
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