heat/cool lever on 1966 Ford Mustang "locked"


Asked by Oct 17, 2013 at 12:32 PM about the 1966 Ford Mustang Base

Question type: Maintenance & Repair

I just purchased this 1966 Mustang, love it, but this morning was the first morning I needed to use the defroster, it was dark, couldn't see, but fiddled around with the levers and got it blowing.  Just about the time I got it blowing nicely the left lever (the heat/cool lever?) locked in the up position so it was only blowing cool air.  How would I go about "unlocking" that lever?

4 Answers

...with any luck the other end of the lever has not "buckled"....what I suggest is a few drops of "TRI-FLOW" what Olympic bicyclists use on their chains...it penetrates, lubricates and leaves a film of teflon behind~ You need to get to the business side...be it an inspection mirror or chimpin' around under there...or snapping the knobs off (or allen screw), the panel off and attempt to reach in there with the lubricant...the other consideration is the diverter valve to which the other end attaches is probably rusted or corroded...seek out the end point of these controls and assure free movement....even if a little disassembly and wirebrush is required~

I could shop for new control cable(s)....think there is just one and a fan speed...middle one is recirc? so no biggie, just change the rusted cable or free the seized control~....you must look 'pon the business end of these controls...disassemble and wirebrush...lubricate and re-assemble....'tis the only way~

Heat, Temp, Def....okay temp is a cable that goes to your heater core....can be put halfway...would inspect the connections and rubber on that one....de- crud and lubricate the cable....the others are possibly scissors type levers going to the flaps? inspection is needed~


There was a small box under the dash on the passenger side, we were able to open it up and reach the cables from the heat/defrost controls, and to loosen the cable in there to where it will work again. It seems to push it all the way up or down causes it to catch somehow and "lock".

Your Answer

Add photo

Related Questions

  • 66 Mustang 200 CI Problems 3 answers

    My 66 Mustang 200 CI straight 6 has starting problems when hot, hard to start and stalls any ideas, motor is new coil is new

    1966 Ford Mustang


    Maintenance & Repair

  • vapor lock 2 answers

    My 1998 mustang with 67,000 keeps getting vapor lock? What would cause it?

    1998 Ford Mustang


    Maintenance & Repair

  • 2006 Ford Mustang - Ruins Alternators & Batteries 78 answers

    Okay, I have owned my 2006 Mustang since September of 2005. It was my first car, I still own it, and it is an every day driver. It has always been outside - never garage kept (I've lived in places w...

    2006 Ford Mustang V6 Base


    Maintenance & Repair

  • Door Locking Problem 4 answers

    2003 Mustang Both doors will unlock, but not lock with the inside switches nor the key fob. Fuses check out. Both FOBS are working.

    2003 Ford Mustang


    Maintenance & Repair

  • Disc brakes on 66 Mustang 3 answers

    We have a 66 Mustang that somebody put disc brakes on and when you drive the car the front left rotor will lock up have put calipers on it and a new distribution block any help would be appreciated

    1966 Ford Mustang Base


    Car Customization


Looking for a Used Mustang in your area?

CarGurus has 41,065 nationwide Mustang listings starting at $900.


Search Ford Mustang Questions

Ford Mustang Experts

#1 Tom Demyan
Tom Demyan
Reputation 3,770
#2 FordNut
Reputation 1,220
#3 carGrrl
Reputation 890
View All

Related Models For Sale

Used Chevrolet Camaro"
799 Great Deals out of 38,820 listings starting at $2,650
Used Dodge Charger"
640 Great Deals out of 29,672 listings starting at $2,275
Used Chevrolet Corvette"
433 Great Deals out of 20,224 listings starting at $3,688
Used Chrysler 300"
580 Great Deals out of 20,785 listings starting at $1,490

Used Cars For Sale

2017 Ford Mustang For Sale
12,265 listings starting at $21,495
2016 Ford Mustang For Sale
52 Great Deals out of 7,535 listings starting at $17,899
2015 Ford Mustang For Sale
184 Great Deals out of 4,139 listings starting at $15,999
2014 Ford Mustang For Sale
103 Great Deals out of 2,885 listings starting at $11,950
2013 Ford Mustang For Sale
43 Great Deals out of 1,423 listings starting at $9,999