The way those work is that the pump puts the fog juice into the heater and it expands and forces itself out of the nozzle. If you are not getting any fog then there is something that is not letting the fog solution into the heater. Check the hoses and the pickup and the pump and make sure that it has some pressure to it. I have seen the pump fail and I have seen the control circuit for the pump not work right
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The way those work is that the pump puts the fog juice into the heater and it expands and forces itself out of the nozzle. If you are not getting any fog then there is something that is not letting the fog solution into the heater. Check the hoses and the pickup and the pump and make sure that it has some pressure to it. I have seen the pump fail and I have seen the control circuit for the pump not work right