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Glad you got your heat working again. It sounds like your blend doors under the dash are not operating. The advice given above by techman1 (above) is great and is probably the culprit here. Inspect the vacuum hoses and ensure they are in good condition and tightened well. Without proper vacuum, the blend door can not operate, which prevents any other vents from having air flow. When something goes wrong with the heating system, the default is to provide air flow to the defrost vent.
Post your results of the vacuum hose inspection and I will follow up as needed.
Hope this helps.
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Friday, January 16th, 2009 AT 1:04 AM