I've been having problems with the fan switch on my '06 Frontier. Sometimes the fan will work and sometimes it wouldn't. When the switch wouldn't work, I would visually check the fuses and everything would look fine. After putting up with the problem, I replaced the blower resistor and the fan a/c control unit. It still will not work even after visually checking the fuses. Once in a while, I hear water sloshing in the heater area. I checked the drain opening on the firewall and I think it is open. HELP!
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