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1995 F150 Heater blowing cold air

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Old 10-30-2011, 03:11 PM   #1
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Default 1995 F150 Heater blowing cold air

I have a problem with my heater blowing cold air. The heater core is hot and hot air blows out directly at the heater core, but all the vents are blowing cold air. All the valves seem to be working and the vacuum lines seem to be all connected. What could be the problem?
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Old 10-31-2011, 06:55 AM   #2
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If both heater hoses are full of water and are hot then most likely the blend door is your problem. Look up heatertreater on the net for more info and a possible fix to your problem.

It is possible that your heater system is air bound. Air inside the core cools very rapidly and hence the feeling of cold air out the vents. Air inside a heater is a no-no, it needs coolant to heat up the fans air which in turn comes out the vents.

Hope my confusing description is of assistance.
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Old 11-01-2011, 08:43 AM   #3
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Thank you for your reply. I will check it out.
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