Aprilaire Humidifier Accessories
Aprilaire humidifier replacement parts, including water distribution trays, scale control inserts, orifices, float assemblies, inlet fill valves, motors, fan blades, current sensing relays and humidistats such as the Aprilaire 60 and 4655. Search by the Aprilaire part number, such as 4407 or 5531, from your manual or the old part.
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Aprilaire parts guide: find the right part number ▾
Popular Aprilaire parts by type
| Part type | Part numbers in this collection |
|---|---|
| Water distribution trays | 4407, 4246, 4331 |
| Scale control inserts | 4330, 4236, 4181, 4640, 4403 (with float chamber) |
| Orifices and feed tubes | 4231 yellow, 4232 blue, 70000037, 4335, 4235 |
| Valves, floats and drains | 5531 inlet fill valve, 4406 float, 4405 float cover, 4410 water level sensor, 4983, 4985, 4223, 4004 strainer |
| Motors and fans | 4199, 4189, 4670 motors; 5929 fan; 4247, 4215, 4188 fan blades |
| Controls | 60 digital humidistat, 4655 manual humidistat, 50 (24v) and 51 (120v) relays, 4740 relay, 4736 board |
How to match a part
Find the model number on the humidifier label, then check the parts list in the manual. Orifices are colour-coded and relays are voltage-specific (the 50 is 24v, the 51 is 120v), so match the exact part. Hard water speeds up scale on trays, orifices and inserts; the HYDRLH kit is for HydroCore Model L in hard water.
Before you start
Turn off the water and power first, and use a licensed HVAC technician for wiring or steam humidifier work.
