GCH

Hi,just wonder if anybody sprayed a little lubrication in the "slots"
on the push buttons (???) on the heater control panel ?

My "push buttons" are a little hard to push in.My defroster does not work at all,only
heat on the floor.But this maybe is a vacum problem.Would be nice to have the defroster working.

Dynamic 88-65.(sorry about wrong words )

MDchanic

I wouldn't do that.

You need to remove the heater control unit from the car, take it apart, clean it, and re-grease it using a white lithium grease, or some other good grease of your choice.

- Eric

GCH

Ok thanks,better to wait,should try to see why not the defroster works and wich vacum clock this is.Can see one facing backwards and one facing to left under the dash.

MDchanic

They are simple devices, and work SO much better when cleaned and re-lubricated.

- Eric

GCH

Yes,checked a picture now it says that the "diaphfragm" facing left should be for the defroster.

MDchanic

You can remove the original vacuum hose from the diaphragm, press on a new length of hose, and suck on it with your mouth to see whether the diaphragm moves the flapper, and whether it leaks air.

- Eric

GCH

Tried this but it could not feel any air from the defroster (was hard)
When fan is on max i could feel a little air from driver side defroster but most of the air flows at the floor.Maybe the flapper has stuck.

MDchanic

When you do that, you should be able to hear the door moving, with the engine and blower off.

You should also feel the diaphragm pull up against the stop, and not have any more air moving - if there is no stop, and you can just keep pulling in air, then there is a hole in the diaphragm.

- Eric

GCH

Ok thanks,i should try it one more time.

GCH

Hi again ,the defroster seems to work better now when i used the heater a little bit more.
But i think the whole heater control unit must be removed and cleaned and
lubricated.Have looked in the chassies manual but not found the easiest
way to remove it from the dash.

Any tip about this are great.

/Glenn.

MDchanic

Unfortunately, I am not familiar with the '65s, so I can't give you good guidance.

I'm sure another member can, though.

- Eric

GCH

Any tip where to buy a new diaphragm , one of my diaphragms are defect. Guess some vacum leak in the heater control unit,can feel i little vacum in the hose but to poor to open the diaphragm who still works.
Has a vacum line direct from the canister in the engine compartment connected to the heater valve on engine and the diaphragm that still works ( facing backwards).

The trap door who was connected to the defect diaphragm are locked in open mode
now.