Troubleshooting Guide

We are the experts on Aprilaire indoor air quality equipment. Most Aprilaire humidifiers and air cleaners can be easily maintained and repaired by their owners so we have set up this page to assist you in doing so. Our site has owners manuals on-line for MOST models made. You can use your browsers print feature to make a hard copy for your personal use. The following links will provide you simple to understand answers to 90% of the questions we receive daily from our clients. If you do NOT find your answer on these pages, email us and we will hapily answer your question.

If you have an Aprilaire 5000 electronic air cleaner and prefer we diagnose it for you this service is also available and VERY popular. We will diagnose your air cleaner for you for only $39.95. Click HERE to find out how.


To learn how to repair your Aprilaire humidifier, click here.

To learn how to repair your Aprilaire 5000 electronic air cleaner, click here.

To learn how to do annual maintenance on your Aprilaire humidifier, click here.

To learn how to maintain your Aprilaire air cleaner, click here.

Why do you need an air cleaner? Click here to find out.


Misc Literature

Aprilaire Humidifier Plenum Hole Cut Sizes

Aprilaire Residential Humidifier Service Manual & Wiring Diagrams


Toll free (800) 825-2148

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