sorry, dis ass ambled should be 'disassembled' (Brian is hard on grammatics). If he had been my examinator in languages , I had never got a degree. ----- Original Message ----- From: "Inge" <[log in to unmask]> To: <[log in to unmask]> Sent: Monday, July 13, 2009 8:39 PM 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. >> >> --------------------------------------------------- >> Technet Mail List provided as a service by IPC using LISTSERV 15.0 >> To unsubscribe, send a message to [log in to unmask] with following text in >> the BODY (NOT the subject field): SIGNOFF Technet >> To temporarily halt or (re-start) delivery of Technet send e-mail to >> [log in to unmask]: SET Technet NOMAIL or (MAIL) >> To receive ONE mailing per day of all the posts: send e-mail to >> [log in to unmask]: SET Technet Digest >> Search the archives of previous posts at: >> http://listserv.ipc.org/archives >> Please visit IPC web site >> http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional >> information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 >> ext.2815 >> ----------------------------------------------------- > > --------------------------------------------------- > Technet Mail List provided as a service by IPC using LISTSERV 15.0 > To unsubscribe, send a message to [log in to unmask] with following text in > the BODY (NOT the subject field): SIGNOFF Technet > To temporarily halt or (re-start) delivery of Technet send e-mail to > [log in to unmask]: SET Technet NOMAIL or (MAIL) > To receive ONE mailing per day of all the posts: send e-mail to > [log in to unmask]: SET Technet Digest > Search the archives of previous posts at: http://listserv.ipc.org/archives > Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 > for additional information, or contact Keach Sasamori at [log in to unmask] or > 847-615-7100 ext.2815 > ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------