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A 737-300/400/500MAINTENANCE MANUAL
 (2)  S 714-019Set the LIGHTS switch on the P2-1 panel momentarily to the TEST position and make sure these lights come on and then go off: (a) CONT CABIN DUCT OVERHEAT (b) PASS CABIN DUCT OVERHEAT
 (3)  S 864-002Make sure that the L and R PACK switches on the P5-10 air conditioning panel are set to OFF.
 (4)  S 864-003Pressurize the pneumatic system (AMM 36-05-00/201).
 (5)  S 754-020Measure the temperature of the passenger cabin with a thermometer.
 (6)  S 864-021Position the AIR TEMP selector on the P5-17 cabin temperature module to PASS CABIN.
 (7)  S 714-022Make sure the indication on the temperature gauge on the P5-17 temperature control module is approximately the same as the thermometer.
 (8)  S 864-023Position the AIR TEMP selector to SUPPLY DUCT.
 (9)  S 714-024Make sure the indication on the temperature gage on the P5-17 temperature control module is approximately the same as the temperature indication for the PASS CABIN.
 S 864-025

 (10)
 Move the CONT CABIN temperature selector on the P5-17 temperature control module to MANUAL WARM.

 S 864-026

 (11)
 Move the L PACK switch on the P5-10 air conditioning panel to AUTO.

 S 714-027

 (12)
 Make sure that the indicator needle on the CONT CABIN - AIR MIX VALVE indicator moves toward HOT.

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737-300/400/500MAINTENANCE MANUAL
 S 864-028
 (13)
 Move the CONT CABIN temperature selector on the P5-17 temperature control module to MANUAL COOL.

 S 714-029

 (14)
 Make sure that the indicator needle on the CONT CABIN - AIR MIX VALVE indicator moves toward COLD.

 S 864-030

 (15)
 Move the CONT CABIN temperature selector to MANUAL OFF.

 S 864-031

 (16)
 Move the L PACK switch to OFF.

 S 864-032

 (17)
 Move the R PACK switch to AUTO.

 S 864-033

 (18)
 Move the PASS CABIN temperature selector to MANUAL WARM.

 S 714-034

 (19)
 Make sure the PASS CABIN - AIR MIX VALVE indicator moves toward HOT.

 S 864-035

 (20)
 Move the PASS CABIN temperature selector to MANUAL COOL.

 S 714-036

 (21)
 Make sure the PASS CABIN - AIR MIX VALVE indicator moves toward COLD.

 (22)
 Move the PASS CABIN temperature selector to MANUAL OFF.

 (23)
 Move the R PACK switch to OFF.

 S 864-037
 S 864-038
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 S 864-083
 (24) Put the airplane back to its usual condition.
 (a)  
Remove the pressure from the pneumatic system
 (AMM 36-05-00/201).

 (b)  
Remove electrical power from the airplane (AMM 24-22-00/201).

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