And fyi buying a Honda will not solve your problems unless you are buying a 90's model with manual windows/locks and no power steering. Mine was re-calibrated in 2014 and replaced in 2015. 7. Remove the 3 defrost/panel/floor mode door actuator screws. If its electric you may... - 2008-2012 Ford Escape The purpose of a heater control valve is to control the flow of engine coolant to the heater core, located within the passenger compartment. NOTE: The upper rear defrost/panel/floor mode door actuator screw can be accessed through the Instrument Panel Cluster (IPC) opening using a swivel-type socket and extension. That was caused by wires in the way and/or sticking actuator. 8. Then locate and identify the actuator to be replaced. There are 3, the one on my truck is easiest to access from the engine compartment as there is a removable panel in the filter box outside on the engine side that gives direct access to that outside air door actuator. I did find the vac actuator for the floor/defrost, normally to floor with no vacuum. This is under the dash on the passenger side . ... '86 Peterbilt 359 long hood w/ 3406B Cat. The actuator had enough power to break the white colored gear drive, that connects the actuator to the blend door. Also, sometimes the center actuator behind the MTC/radio will stick and blow only air out the defrosters. 2014-04-30 19:46:17. where is the defrost actuators located. This is located near the back of the radio and down. 6. Here a fan forces air across the surface of the heater core and then into the passenger compartment where the warm air is felt. Disconnect the defrost/panel/floor mode door actuator electrical connector. This video explains the process of changing out the vent selection actuator for a 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Ford Explorer. I don't hear clicking like many people hear when the mode actuator is bad. The air blows best out the front vents and not so well on the feet. Help with blend door actuator location/replacement. RE: Location of blend door actuator on a prostar? I just disconnected the door and let if fall. I switch the mode to defrost and you hear it shifting over, but never gets there and then blows hard out the front vents. 0 0 1 ... Where is the turn signal flasher on a peterbilt 379? You will need to check the vent actuator to see if its functioning. Harness Breakout Location Front Wall Front Engine Connections Crossmember BOC Crossmember DROPCAST BOLT ON SPLAY 108 108 A A 096 A 082 A 000 109 C A 000 E 000 F 000 068 D B 000 A 000 B 001 Z Rear Frame Back of Cab P. 1B-5. I cannot find an actuator at this location, but there is a linkage that makes two doors move in conjuction. The reason they got their reliability reputation in the first place was because they were all so basic with 2v engines at 80/100 hp. When the heater or defroster is turned on, warm engine coolant passes through the heater core. Western Star Bodybuilder Book: Revision3.1 1B Chassis Max Complexity Harness All LHD EPA 2010 Models: Front Wall Fwd Begin by identifying the problem either defrost, mid or floor, or temperature modes not working. Where is the location of the blend door actuator at? Sometimes the air will blow out of the defrost vents, but most of the time it comes out the front facing vents. I noticed that my defrost is intermittent. Please help. Typically need software update and potentially remove actuator to re-calibrate as indicated by sc00bk earlier in the thread. The blend door has a metal D shaft that the drive gear slides over. These units can be either hanging in front of you or in a little more obscure places such as … The Heat and cool air work on all speeds. Blend Door Actuator Locations. The actuator is a controller that opens and closes the flapper that direct the airflow from the fan . 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