I have a Lennox electronic air cleaner, which is about 17 years old.
There are two indicator lights. One is green for input voltage and one
is red for output voltage. Both lights are always on. Even so, I do not
think the unit is working. I do not hear any sparking or zapping of
dust and I find that the house is dustier lately. How can I tell for
sure if it is working or not? (I do clean the unit regularly)
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