How To Remove Heater Knobs?

[JerseyHarold]

I want to disassemble a heater control like the one pictured so I can clean it.  I tried pulling the knobs off and they don't move.  How are they held on?  I see a slot in the bottom of the knob, does the knob pry off from there?

[58prostreet]

My '52 Dodge uses a small allen wrench, Don't remember size.

Bob

[BobT-47P15]

I think the allen wrench thing sounds right........of course, it will be on the bottom side of the knob.......unless you can turn it

to the side. 

[Niel Hoback]

  I think if its a square hole there is a small metal tang in there that needs to be pushed towards the switch. That will release its grip in the shaft and allow you to pull the knob off while holding the tang back.

[Plymouthy Adams]

This is my favorite style of heater control for these old car..it is nostalgic in appearance and the fact that the knobs are compatable with the switches of modern AC units due to the shaft size.  On mine, the knobs did come off with the use of an Allen wrench..they are held in place by set screws..the set screw is quite deep into the end of the knob..

Edited March 1, 2013 by Plymouthy Adams

[JerseyHarold]

Thanks for the replies.  So far this thing is eating my lunch.  I shined a strong flashlight into the slot in the bottom of the knob and there is no allen screw or anything like a spring clip to push on.  I turned the knobs to their various detent positions while following the slot with the light and there were no gaps for a poke awl.  At this point I'm stumped.

[Plymouthy Adams]

probe with an allen wrench..it is a small allen and the screw is deep..at least so in mine...

[DCurrent]

probe with an allen wrench..it is a small allen and the screw is deep..at least so in mine...

I agree, If there is a hole at the bottom of the knob, then I would suspect there to be a allen set screw in there. It is possible it is missing. it could be tiny and way up in there. Nothing to loose by sticking a few sizes in the hole.

 

Darren