Humidifiers and Dehumidifiers - Aprilair 550 on all the time

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

View Full Version : Aprilair 550 on all the time

thunder1951
12-30-07, 09:32 AM
New Years Greetings to you mods and members, I have a Aprilair 550 and last year I had my furnace replaced now the unit will constantly run without shutting off it never used to do this. I did replace the electric solinoid and no help. Could the contractor/installer connected the electrical incorrectely? I just went out and bought a complete new AA 550 to replace it. I will install it. But how would I know if the wiring is not correct to the tiny transformer?? I believe I can install this new one, I am a computer technician/installer by trade. Thank you!!!:thinker: :confused:

PS;
I have one pair wires coming out of furnace to transformer then one pair from transformer to humistat then to soleniod it is a goodman furnace # GMS9

Jay11J
12-30-07, 07:36 PM
Sounds like it's wired up wrong..

There should be a wire from HUM on the board going to the transformer.

Or no need of transfromer, there is a piggy back on the pressure switch (Brown wire), and that is 24 volts.