Aprilaire Air Purifiers - Recent Questions, Troubleshooting & Support

Question edited for clarity. Question moved from Microwave Ovens! Contact their technical support direct, as this is well beyond the scope of Fixya and you actually sound like you know what you are doing which only happens twice a month. https://www.aprilaire.com/contact ..

Replace the Aprilaire #4598 Ionizer Frame Assembly to correct this condition and return unit to operation with the green light now illuminated.

When was the last time the filter was changed and electrostatic wires wiped? If the light is on the unit is working. Please check the filter media and wipe the fine metal wires on unit adjacent to the pleated filter.

I think you would be better served, by directing your question to a Respiratory Specialist.

Nevertheless, thanks for choosing FixYa.

Hello, in order for the humidifier to turn on and off with the furnace you need either a sail switch or current sensing relay. A sail switch mounts in the return air duct and senses the return air when the furnace turns on thus turning on the humidifier and turning it off when the airflow stops. A current sensing relay works the same way but instaed of sensing airflow in senses current on the blower motors common lead and is easier to install than a sail switch. I will post a pic of both

Sail switch



Current sensing relay

After you pull out the filter case. There is a tab on the bottom and on the top that holds the ends in undo these.lift out the combs and the filter. Open the new filter and hook it onto the tabs of the filter case and close the ends back up. Get one of the combs in all the cracks of the new filter then slide the next comb in right next to the one that is installed and slide it down to the furthest slot where the combs go. and do this for the rest of the combs until they are all inserted. once they are all in replace the filter case into the cavity be sure to line the slots up on the case and the cabinet and put the door back on.

There were some problems where people used glas-fiber-islations as a filter (it could be yellow or white), the problem generated because air filters and isolations camed in more or less same packageing (people didn't know, or couldn't know the diference) if u rub the new filter and it starts hurting or burning finger's you have isolation, if not there could be a problem with chemicals that where in filter fiber's, you can leave it on sun for a few hour's and bring it back in
this is the best i can do to help you

When u changed the filter u most likely got the filter enclosure door back together wrong, there is a switch in the door that locks out power, remove the access door for the filter and make u don't see any broken parts, the carefully put it back together