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=== Parts Needed for Modifications === Below is a list of components needed to convert from Automatic Climate Control (ACC) to Manual Climate Control (MCC). Many ACC parts can be reused, but the following must be replaced or sourced for manual control: - '''Heater/AC control unit'''β Contains the vacuum control switch, blower speed control, A/C micro switch, light, and water cock control cable.- Consider replacing: switch/rheostat (recommended) * Consider replacing: lamp (recommended) * Test micro switch for actuation Tip: Check the lamp with a 12V source β itβs nearly impossible to replace once installed without removing the dash again. * Heater water cock β Controls water inlet valve and connects mechanically to air mix door. * Air mix door interlock rod, set screw, and attachment to air mix door shaft. * Heater hose inlet and outlet pair β Unique to manual control. * Heater hose bypass piece β Runs from water jacket connector to valve-pressure regulator tee. * Water jacket connector β Manual version has two hose connectors instead of one. * Heater hose valve-pressure regulator tee β Replaces temperature switch in auto unit. * Blower wiring harness β From control unit to blower. * Vent bypass switch β Manual only (mounted on lower left dash panel). * Blower (fan) control amplifier. | Part Description | Part Number | |---|---| | Heater Control Unit | ** 27030-P7101 | | Blower Switch'' | '' 27041-P7100 | | Water Cock | 27116-P7100 | | Interlock Rod, Set Screw, and Bracket | 27119-P7100 | | Water Jacket Connector | 27195-P7100 | | Valve-Pressure Regulator (Tee) | 27188-Q0105 | | Blower Wiring Harness | 27038-P7101 | | Heater Hose Pair (Inlet/Outlet) | 27180-P8100 | | Heater Hose Bypass | 27183-P8100 | | Control Unit Light/Lamp'' | '' 27134-P7100 | | Vent Bypass Switch | 27037-P7100 | | Blower (Fan) Amplifier | 27177-P7100 | * Recommended replacements. ** The control unit can be ordered new from Nissan or sourced from a salvage yard. Rebuild as a minimum by replacing the switch/rheostat and lamp to avoid future dash removal.      
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