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Why does your car heater only work when its hot and your ac only work when its cold outside?
Wiki User
∙ 12y ago
It sounds like it may not be working at all. Does the warm air get warmer that the ambient air outside your car? Does it get colder than ambient air in the cool cycle? It sounds like it is just passing the outside air through the blower but doing nothing to it. Possible blown fuse in the fuse box under the dash or in the fuse box under the hood.
If it does get colder or warmer at the outlets of the AC system, then you could have a couple of wires reversed, or another problem that requires on site inspection to find. Take it to a repairshop.
Wiki User
∙ 12y ago
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