GENERAL SERVICE PAGE
Lack of Humidity …………………………………………………………2
Excess Humidity …………………………………………………………4
Leaking Water ……………………………………………………………4
Noise ……………………………………………………………………4
General Maintenance ……………………………………………………4
INDIVIDUAL UNIT SERVICE
Models 220-224-400*-440-550-550A*-558*-560-560A*-568*-600*…6
Models 760,760A* & 700* (formerly model 768*) ……………………13
Models 445,445A* & 448* ……………………………………………16
Model 350, 360 …………………………………………………………19
Models 110 & 112………………………………………………………22
*Units featuring the Aprilaire Humidifier Control
©Research Products Corporation 2006
This Service Manual is divided into two sections.
The first section is general service common to all residential models.
The second section is specific service required on individual models.