Air Cleaner Temperature Sensor

The temperature sensor should allow vacuum to close the duct door to fresh air at ambient temperatures below 75°F (24°C). The sensor should bleed off vacuum, allowing duct door to open to fresh air, at or above 75°F (24°C) on Brown valve, 90°F (32°C) on Pink or Black valve, or 105°F (41°C) on all other colors. If valve does not perform to specifications, replace valve and retest.