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Heat only work above 1500 rpm

1084 Views 2 Replies 3 Participants Last post by  kmagnuss
My 1998 4.6 has started to only blow hot air when it is driving down the road or if you sit and hold the revs above 1500 rpm, sometime it take 1800 rpm's. But when you are driving it is usually fine.
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Yep...your coolant is low.

PS..you have a leak.
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