No heat in my 5ktq

[SJ]

More than likely the brushes on the blower motor are worn out - not long
enough to make contact with commutator.

You should test for voltage at the blower motor - just to make sure its not
an electrical control problem.
If you get voltage at the motor, you can temporarily fix the symptom by
cleaning the brushes.

The brushes/brush holder/brush wire braid  get gummed up with years of
accumulated brush dust and oils and greases. This accumulated gunk in the
brush holder prevents the brush from sliding easily. When the brushes get
worn down, the brush spring does not exert enough pressure to make firm
contact between brush and commutator.

On my car, I solved the problem by getting at the blower motor and spraying
WD-40 on the brush assembly. You cannot get at the bottom brush, but if you
spray WD-40 on the top brush, enough will run down and around the commutator
to get onto the bottom brush.
I also used a dental pick on the top brush to move it up and down and free
it up.
I used a hair drier (on low setting) to dry out the solvents after the
cleaning . . .dont want start a fire in there from brush arcing.

This solution has worked for almost a year now. No problems so far. I have a
new blower motor waiting to be put in.

Easy fix thats worth trying.
To get at the blower motor, you need to remove:
- windshield wipers
- Plastic cover that protects blower assembly area.
Then you remove a rubber cap on the motor housing to get at the brushes.

SJ
85 Dodge PU, D-250, 318, auto
85 Audi 4k - - sold but still on the road
88 Audi 5kq
90 Audi 100q



> Date: Mon, 5 Dec 2005 07:42:02 -0500
> From: "Stricker, Michael" <Michael.Stricker at gd-ais.com>
> Subject: No heat in my 5ktq

> Hi,
>
> There was no heat in my 1988 5ktq today.  I hear no fan(s) blowing and
selecting the different modes doesn't cause anything to happen.  It seems as
though a fuse or relay are bad.  The system ran fine only 1 day ago.
>
> Any ideas would be appreciated.
>
> Thanks
>
> Mike



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