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From:
Lee Whiteman <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Mon, 13 Jul 2009 15:02:57 -0400
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Inge,



I suggest that prior to your next car repair, that you consult Car Talk on NPR. At minimum you'll get a few laughs and may actually get your car fixed.



Lee Whiteman, PMP

Senior Member Engineering Staff

L-3 Communications East

Telephone: (856) 338-3508

FAX: (856) 338-2906

E-Mail: [log in to unmask]

 



-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge

Sent: Monday, July 13, 2009 2:39 PM

To: [log in to unmask]

Subject: Re: [TN] NTC (It's not Friday, but this is so true!)



& Law of  Car AC System Repair



You will automatically start trouble shooting in the wrong end, and will not 

find the failure until when at least 50% of the car is disassambled.



I can prove that, will send pictures to Steve, IF he still can  or want 

serve us. My AC works intermittently. After one year of annoying I decided 

to fix it. Listened with my Volvo man. Typical cost 1,000 dollars and up to 

(won't miscredit Volvo by telling what the bill can be), so I went home and 

said to myself, you are a highly specialized technician, will be a peace of 

a cake to fix that yourself. The start was not the best: Volvo do not give 

you the electrical diagram with your customers manual any more. OK, an AC is 

a simple refrigerator, compressor, condensor, reservoir, fan, a switching 

thing and perhaps a power relay. I got some help from a friend, who meant 

that my old Volvo must have lost freezer liquid after 12 years, so he made 

some operational things in the system but found no missing agent. Then it 

could be the fan, which use to be one of the first parts to making trouble 

with time. Not the fan. OK, the compressor. No failure there either. The 

magnetic clutch? Nada.  The temp sensors? Nada. OK, said my friend, now I 

got it. You just need change the power relay that tells the clutch to rotate 

the compressor. Where is that, I asked. Use to be somewhere behind the 

instruments, said my friend. Very right, after some demounting of ashtray 

and fuse boxes, I found a board with 12 relays. Took me an hour to find out 

how on earth they had pressed that big thing throug the little hole in the 

panel. No drawing. I deplugged the first relay, decapped it, Ohm'ed it and 

connected it to 12 Volts. Worked. Next relay, wasn't that. Went through all 

12 relays, no failures. Forced the relays to operate after starting car at 

least 25 times. Began to suspect a mystic regulator box with innumberable 

wires in and out plus a number of pneumatic plastic tubes. The press button 

to start the AC was there,  disassambled the unit to test the switch, but 

there were no wires, just a plastic lever that operated something in a 

closed box. OK, then let's have a look at that PWB with lots of component on 

both sides. Aaahh, the heart!  My experienced eye found a cold soldered 

joint within a couple of minutes. I sucked up the bad solder and resoldered 

the relay pin, put all things back, and ...alas... when depressing the AC 

button,  there was a click, the motor rpm lowered when compressor started 

and the cool air came within 20 seconds.  But....as the law said....I began 

in the wrong end and had to slaughter most of  the instrument panel.  See 

the photos and feel horror.

Quod eram futurus probo

/Inge





----- Original Message ----- 

From: "Brian Ellis" <[log in to unmask]>

To: <[log in to unmask]>

Sent: Monday, July 13, 2009 3:25 PM

Subject: [TN] NTC (It's not Friday, but this is so true!)





> THE LAWS OF ULTIMATE REALITY

>

> &   Law of Mechanical Repair

> After your hands become coated with grease, your nose will begin to itch

> and you'll have to pee..

>

> & Law of Gravity

> Any tool, when dropped, will roll to the least accessible corner.

>

> & Law of Probability

> The probability of being watched is directly proportional to the

> stupidity of your act.

>

> & Law of Random Numbers

> If you dial a wrong number, you never get a busy signal and someone

> always answers.

>

> & Law of the Alibi

> If you tell the boss you were late for work because you had a flat tire,

> the very next morning you will have a flat tire.

>

> & Variation Law

> If you change traffic lanes, the one you were in will always move faster

> than the one you are in now (works every time).

>

> & Law of the Bath

> When the body is fully immersed in water, the telephone rings.

>

> & Law of Close Encounters

> The probability of meeting someone you know increases dramatically when

> you are with someone you don't want to be seen with.

>

> & Law of the Result

> When you try to prove to someone that a machine won't work, it will.

>

> & Law of Biomechanics

> The severity of the itch is inversely proportional to the reach.

>

> & Law of the Theatre

> At any event, the people whose seats are furthest from the aisle arrive

> last.

>

> & The Starbucks Law

> As soon as you sit down to a cup of hot coffee, your boss will ask you

> to do something which will last until the coffee is cold.

>

> & Murphy's Law of Lockers

> If there are only two people in a locker room, they will have adjacent

> lockers.

>

> & Law of Physical Surfaces

> The chances of an open-faced jam sandwich landing face down on a floor

> covering are directly correlated to the newness and cost of the 

> carpet/rug.

>

> & Brown's Law of Physical Appearance

> If the shoe fits, it's ugly.

>

> & Wilson 's Law of Commercial Marketing Strategy

> As soon as you find a product that you really like, they will stop

> making it.

>

> & Doctors' Law

> If you don't feel well, make an appointment to go to the doctor, by the

> time you get there you'll feel better. Don't make an appointment and

> you'll stay sick.

>

> & Law of Logical Argument

> Anything is possible if you don't know what you are talking about.

>

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