The heat will not come through the ducts until the engine revs above idle only cold air. I noticed the coolant was low so I filled to the line and it worked the heat comes on during idle. After 3 days it stops working during idle and I noticed the coolant level was low again. I see no white smoke from the exhaust and no spills under the engine. Please help

Have a mechanic pressure-test the cooling system to determine where the fluid is going.

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Originally Posted by this8384

Have a mechanic pressure-test the cooling system to determine where the fluid is going.

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Good suggestion thanks Ill do that today