Sunday, May 5, 2019

Preparing for Ford Nationals - AC Part 3 - Control Panel & Bench Testing

This evening, I rebuilt the stock A/C control panel to using the parts from the Classic Auto Air kit.  This portion of the kit left a bit more to be desired that the other parts that I've installed to this point.  

I started working through the instructions by installing the new fan motor control.  This replaces the stock control and is expected to mount using the same bolts.  However, when I used them, the switch was oriented such that the low, medium, and high positions were available but off was not.  I had to drill a new mounting hole for the lower side of the bracket so it would align properly.


The kit uses the stock levers for the mode (passenger, defrost, floor) and temp (cool, heat).  Using the stock levelers allows you to retain the stock knobs.  However, the new fan motor switch comes with a knob which does not resemble the other knobs.  I attempted to use the stock knob but the set screw is not long enough to hold onto the new thin lever so I ended up going to the store for a new set screw which worked.



There is a new bracket which is installed in place of the OEM vacuum module which changes the A/C mode.  One end has a tab which slides into a hold in the stock control panel and bolts through a hole in the other side.  This new bracket and the bolt were supplied by Classic Auto Air but the hole in the bracket was not the right size for the bracket.  No big deal but it is strange to keep needing to modify items for something referred to as a Elite Fit.



Once I finished with the controls, I decided to follow the process to bench test the entire A/C unit.  You essentially take the entire A/C box, control unit, and wire it all up outside the vehicle.  You take steps to cycle through the settings on the control unit so it adjusts to the extremes of each of the lever moves.  Once this is done, you can then test to ensure the floor, defrost, and passenger air controls as well as the heater water valve.  Everything works great so I'm ready to start moving on to the next steps.

No comments: