Humidifiers and Dehumidifiers - Aprilaire 700 failing control boards

Doityourself.com community forum was created to provide answers to all questions related to home improvement and home repair. Doityourself community can help you find information about how-to topics on small fixes to large remodeling projects. With comprehensive how-to content and expertly moderated community forums DoItYourself.com makes it easy to tackle even the most complex home improvement projects.



PDA
sboccio
01-08-06, 06:39 PM
I have an Aprilaire 700 that is in need of it's third control board replacement in a year's time. The most recent board lasted three weeks before failing. The unit is plugged into an AC outlet on the furnace that is powered when the blower kicks on. I replaced an Aprilaire 760 with this 700 model a year ago but I did not change the humidistat or any internal wiring to the furnace, assuming they would work on the 700 model.

Any suggestion as to why I am burning up control boards is greatly appreciated.

Steve

Jay11J
01-08-06, 08:12 PM
power coming out of the furance 24 or 120 volts???
krankyoleman
01-19-06, 06:00 PM
Is your 24v connected to the 24v on the furnace. it shouldn't be. The 24v wires through a 50relay to the humidistat and back.