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Message: <blockquote data-quote="Zippi" data-source="post: 1657575" data-attributes="member: 639019">I just installed a power-vent water heater in my home. It has an exhaust fan that runs whenever this natural gas heater is heating water.Whenever the fan turns on, I get extreme whining on my AM radio, which disappears once the fan stops. The pitch of the whining seems to be at a similar frequency as the sound from the running fan....there is no doubt, in my mind, that the fan is causing the interference.FM reception has little-to-no such interference.Can anyone help me cure this problem?Thank you for your help!</blockquote>