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2000 f150, No Heater

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Old 11-28-2009, 01:21 AM   #1
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Default 2000 f150, No Heater

I have a 2000 model F150 4.3L V6. The air that comes out of the heater does not heat up. You can barely feel it get a little warm. That temp gauge on the dash seems to be working. AC works good. I was thinking it might be low on water, but the overflow has some liquid in it.

I would love to troubleshoot it.

How does the temp selector work, is it electronic, vacuum, or manual. I assumed the hose going to the heater core is the one coming out of the top of the engine. It doesn't appear to have any type of valve or switch in it. How does this system work.

Any ideas or help would be appreciated.

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Old 11-28-2009, 01:31 AM   #2
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you need to research other threads out here about this concern

1st u need to check both heater hoses coming from the heater core make sure both are equal tempature in not or one is hot your core is probably plugged if bothar ehot then possibly a blend door issue.
both hoses cold check your cooling system t-stat waterpump etc,etc
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Old 11-28-2009, 01:38 AM   #3
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I will agree with seniorfordtech, I say it is a blend door issue probably broken. Do a search here and find lots of info.

also do a google on heatertreater he does a videofix with out removing the dash.

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