Jim HIlgeford Posted June 22, 2019 Share Posted June 22, 2019 My panel and By Level system has a bad Actuator or vacuum leak. When reading the manual it does not explain how to get in and repair. Anyone have the top of dash or whatever to get to the actuators? recirculating door operates correctly. Thanks in advance. Link to comment Share on other sites More sharing options...
Reaper1 Posted June 24, 2019 Share Posted June 24, 2019 Usually the hard line under the hood gets broken. Find the heater hoses at the fire wall. Directly under them are 2 hard vacuum lines that are for controlling the HVAC. Over time they get brittle and break, causing loss of HVAC zone selection control. Start with that and let us know what you find. Link to comment Share on other sites More sharing options...
Jim HIlgeford Posted June 24, 2019 Author Share Posted June 24, 2019 Thanks. I will check both lines Link to comment Share on other sites More sharing options...
Jim HIlgeford Posted June 25, 2019 Author Share Posted June 25, 2019 one line feeds vacuum to control valve. (dark color} 2nd line back out to feed water valve vacuum . (grey color) Would like to know if anyone has ventured into actuators. After vacuum changes air flow to panel or by flow when next acceleration it looses vacuum and defaults back to defroster. One way valves (under hood) checks OK Link to comment Share on other sites More sharing options...
Hemi Dude Posted June 25, 2019 Share Posted June 25, 2019 You may need an actuator for the mode door. Part# 4462918 It is mounted high above the accelerator on the AC / Heater housing. Link to comment Share on other sites More sharing options...
Jim HIlgeford Posted June 25, 2019 Author Share Posted June 25, 2019 Thanks for pointing me in the correct direction. Better to wait for cooler weather. Link to comment Share on other sites More sharing options...
Reaper1 Posted June 25, 2019 Share Posted June 25, 2019 Later cars started coming with vacuum reservoirs. The V6 cars have one that sits next to the battery. The 4-cylinder cars got one that looks like an old 35mm film canister. Link to comment Share on other sites More sharing options...
Hemi Dude Posted July 10, 2019 Share Posted July 10, 2019 I have 4 NOS 4462918 ACTUATORS IN STOCK. Let me know if you want one. PM me or reply here. Link to comment Share on other sites More sharing options...
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