If the water valve is fully open, then I'd say the core is almost plugged up. After some air passes over it, there is not enough hot water to keep it warm.
Run the blower on low speed, and use recirc air, until you can get it fixed.
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Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing.
TEMS, and some nice MODS. Sold to a friend 10/08/08.
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