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Question:

the pump makes noise, the heat exchanger is hot...no fog?

the machine seems to be workign but no fog is coming out. It makes noise, gets hot and seems to be pumping.

Answer:

Is it a fog machine or a smoke machine? A fog machine is a large barrel you fill with water, put dry ice in the basket, and there is a blower on the cover. A smoke machine is a small box that you put a special solution in that makes the smoke. Did you put in the solution or get dry ice, whichever your machine needs?

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