Air Cleaner Temperature Sensor
With temperature sensor less than 75°F (24°C), apply 8 in. Hg vacuum to source port. Duct door should close. If door does not close, replace sensor. Sensor will bleed off vacuum to allow duct door to open and let in fresh air at specific temperatures. See AIR TEMPERATURE SENSOR OPENING IDENTIFICATION table.
AIR TEMPERATURE SENSOR OPENING IDENTIFICATION
| Sensor Color | Temperature |
|---|---|
| Brown | 70°F (21°C) |
| Pink, Black or Red | 90°F (32°C) |
| Blue, Yellow, or Green | 105°F (41°C) |