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Hello my name is ***** ***** will be my pleasure to assist you. The air cleaner does not come on until the main furnace blower is on. If the blower for the furnace is on then the air cleaner should come on. Try turning the fan switch on the thermostat to the on position instead of auto and see if the air cleaner comes on.
okay that was my first thougt. but if you take the top off check for power at the switch with and electric meter where the power wire comes in. Can you tell where the power to the air cleaner comes from in the furnace? Sometimes they wire them off terminals on the board labeled eac or hum.