HECAT on Fri May 22, 2009 2:04 PM
Yes the shop was wrong.
Flushing is using a liquid solvent and delivery method to wash out all the waste oils, debris, and other foreign substances.
Evacuation is pulling a vacuum on the system to remove air and moisture (humidity).
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TRB on Fri May 22, 2009 5:53 PM
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Originally posted by: HECATYes the shop was wrong.
Flushing is using a liquid solvent and delivery method to wash out all the waste oils, debris, and other foreign substances.
Evacuation is pulling a vacuum on the system to remove air and moisture (humidity).
I am truly amazed at now many times I am asked this question after a customer has spoken to another shop.
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Cussboy on Sat May 23, 2009 11:10 AM
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Originally posted by: Help_Meshop said flushing is the same as evacuating.
I would run, not walk, far away from them !!!
TRB on Sat May 23, 2009 12:07 PM
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Originally posted by: CussboyQuote
Originally posted by: Help_Meshop said flushing is the same as evacuating.
I would run, not walk, far away from them !!!
Cussboy you would be surprised at how many "professional" shops do not know or have the equipment to remove the debris we find in damaged systems. I'm amazed at times how these types of shops just blame the compressor and want a warranty.
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Cussboy on Sat May 23, 2009 3:08 PM
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Originally posted by: TRBCussboy you would be surprised at how many "professional" shops do not know or have the equipment to remove the debris we find in damaged systems. I'm amazed at times how these types of shops just blame the compressor and want a warranty.
I remember when I backflushed my condenser and high pressure line on my '88 Mazda B2200 truck after a compressor seize, there was definitely debris in the solvent.
As to "professional" shops, not AC-related, but in 1980s an import repair shop told my sister (she took it there to have all the fluids changed) that her just-purchased used Datsun truck needed a new clutch because there was only 1 inch pedal free play (also indicative of a new clutch disc), where previous owner (who worked at a dealership) had replaced it two months earlier. They said the clutch slave cylinder was also leaking, but they were afraid to touch it because of the clutch condition. She told them not to touch anything, and I took off the slave cylinder without any repair manual, found the leak to be from the clutch master cylinder, replaced that, and she NEVER had a lick of trouble from it. Some professional shop, tried to ream a girl.
Jump to 1996, wife took our recently-purchased '88 Sub in for a transmission fluid change, since I'd only worked on manual transmissions. They called me to come take a look, showed me a small amount of particles in the pan, I said that didn't look too bad for 2 years since last change, then they showed me BLACK transmission fluid and said they were afraid to add new fluid as it would lock up the transmission, said it needed rebuild or they could add-back the dirty fluid. I said add back the dirty fluid. That evening, checked the transmission fluid and it was PINK !!! So obviously the balck fluid couldn't have been from my Sub. And this from a transmission shop, not even an all-purpose shop. They offered a $150 teardown/inspection on my transmission, and if it didn't measure to spec, that $150 could be applied to a rebuild (if not, apparently such transmission would be in boxes). I think they also tried to scare a woman customer, so I'd say from experience that it happens on purpose, not just from ignorance.
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