2002 Corolla: Turning fan on, can hear clutch?
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From: Jane Galt on 9 Apr 2010 01:38 "Jeff Strickland" <crwlrjeff(a)yahoo.com> wrote : > > "Jane Galt" <Jane_G(a)gulch.xyz> wrote in message > news:Xns9D53C261EED4FJaneGgulchxyz(a)216.196.97.142... >> dbu'' <nospam(a)nobama.com.invalid> wrote : >> >>> In article <Xns9D531146CEF16JaneGgulchxyz(a)216.196.97.142>, >>> Jane Galt <Jane_G(a)gulch.xyz> wrote: >>> >>>> This is weird. When the car is in idle and I switch the AC fan on ( with >>>> the compreassor off ) it slows the RPM slightly and sounds like the AC >>>> compressor kicking in. With the round AC compressor switch OFF. >>>> >>>> What is THAT? >>> >>> is the lever position on defrost maybe? >>> >>> I think the compressor runs when the defrost is selected. >>> >>> Just a guess of course. >> >> No. With the output switched to the front vents. >> >> >> Speaking of those, this car doesnt have what I call the "crotch vent" >> under >> the steering wheel, that the 93 has. It's shame because that really cools >> my >> thighs when I wear shorts in the summer. >> >> -- > > > If _that_ needs to be cooled while you're driving, you're not keepng your > mind on driving. LOL. It's summer, and when wearing shorts, blowing cool air on the thighs cools the whole body. :) -- Jane Galt "There is no difference between communism and socialism, except in the means of achieving the same ultimate end: communism proposes to enslave men by force, socialism - by vote. It is merely the difference between murder and suicide." -- Ayn Rand
From: Ray O on 9 Apr 2010 12:01 "Jane Galt" <Jane_G(a)gulch.xyz> wrote in message news:Xns9D54F05D8740FJaneGgulchxyz(a)216.196.97.142... > "Ray O" <rokigawa(a)NOSPAMtristarassociates.com> wrote : > >> >> "Jane Galt" <Jane_G(a)gulch.xyz> wrote in message >> news:Xns9D53E0621E3DFJaneGgulchxyz(a)216.196.97.142... >>>>> >>>> >>>> If the vents are set to the front outlets and down on the feet, the >>> system >>>> is not in the defrost mode and it is unlikely that the compressor is >>>> engaging. The easy way to check whether or not the compressor clutch >>>> is engaging or not is to open the hood and look at the compressor >>>> while the engine is idling. When the AC button is pushed, you'll see >>>> the clutch >>> pop. >>> >>> Just couldnt figure why I was hearing ANY change when merely turning >>> the fan on low, without the compressor on. >>> >>> >>> -- >>> Jane Galt >>> >> The fan puts roughly the same load on the car's charging system at all >> fan speeds other than off. At low fan speed, current flows through >> resistors before it gets to the fan motor. At high fan speed, there is >> less resistance but the fan motor draws more. >> >> Your air purifier is probably drawing at least 10 amps, > > Dont have one in the 2002 yet. > >> and added to the >> fan and whatever else you may have been using like a radio, headlights, >> fuel pump, ignition system, wipers, rear defogger, and other equipment >> like a GPS, inverter for a laptop, etc. and the charging system has to >> do some work. > > No, this is in idle and the only heard difference is when I switch the fan > on, to low. > >> When there is a heavier load on the alternator, the engine has to work a >> little harder to turn it. The extra load drops the engine RPM a bit, >> the engine control computer notes the drop in RPM and adjusts the idle >> speed back to where it should be. The engine RPM variation is basically >> the same thing that happens when the AC compressor clutch is energized >> so it may have sounded the same to you. The difference is, with the >> hood open, you can usually hear an audible click when the compressor >> clutch is energized. > > THis is inside, with hood closed. > > > -- > Jane Galt > Noise, vibrations, and sounds are difficult to identify without experiencing them first hand, but if you are hearing a click inside the passenger compartment when you turn on the fan, my guess is that you are hearing a relay clicking. -- Ray O (correct punctuation to reply)
From: Jeff Strickland on 9 Apr 2010 12:31 "Jane Galt" <Jane_G(a)gulch.xyz> wrote in message news:Xns9D54F08B09AF4JaneGgulchxyz(a)216.196.97.142... > "Jeff Strickland" <crwlrjeff(a)yahoo.com> wrote : > >> >> "Jane Galt" <Jane_G(a)gulch.xyz> wrote in message >> news:Xns9D53C261EED4FJaneGgulchxyz(a)216.196.97.142... >>> dbu'' <nospam(a)nobama.com.invalid> wrote : >>> >>>> In article <Xns9D531146CEF16JaneGgulchxyz(a)216.196.97.142>, >>>> Jane Galt <Jane_G(a)gulch.xyz> wrote: >>>> >>>>> This is weird. When the car is in idle and I switch the AC fan on ( > with >>>>> the compreassor off ) it slows the RPM slightly and sounds like the AC >>>>> compressor kicking in. With the round AC compressor switch OFF. >>>>> >>>>> What is THAT? >>>> >>>> is the lever position on defrost maybe? >>>> >>>> I think the compressor runs when the defrost is selected. >>>> >>>> Just a guess of course. >>> >>> No. With the output switched to the front vents. >>> >>> >>> Speaking of those, this car doesnt have what I call the "crotch vent" >>> under >>> the steering wheel, that the 93 has. It's shame because that really > cools >>> my >>> thighs when I wear shorts in the summer. >>> >>> -- >> >> >> If _that_ needs to be cooled while you're driving, you're not keepng your >> mind on driving. > > LOL. It's summer, and when wearing shorts, blowing cool air on the thighs > cools the whole body. :) > When I do that, they call my parole officer, especially when I drive through the parking lot at the supermarket. You women have it so easy ...
From: Jeff Strickland on 9 Apr 2010 12:32 "Jeff Strickland" <crwlrjeff(a)yahoo.com> wrote in message news:hpnkpj$qar$1(a)news.eternal-september.org... > > "Jane Galt" <Jane_G(a)gulch.xyz> wrote in message > news:Xns9D54F08B09AF4JaneGgulchxyz(a)216.196.97.142... >> "Jeff Strickland" <crwlrjeff(a)yahoo.com> wrote : >> >>> >>> "Jane Galt" <Jane_G(a)gulch.xyz> wrote in message >>> news:Xns9D53C261EED4FJaneGgulchxyz(a)216.196.97.142... >>>> dbu'' <nospam(a)nobama.com.invalid> wrote : >>>> >>>>> In article <Xns9D531146CEF16JaneGgulchxyz(a)216.196.97.142>, >>>>> Jane Galt <Jane_G(a)gulch.xyz> wrote: >>>>> >>>>>> This is weird. When the car is in idle and I switch the AC fan on ( >> with >>>>>> the compreassor off ) it slows the RPM slightly and sounds like the >>>>>> AC >>>>>> compressor kicking in. With the round AC compressor switch OFF. >>>>>> >>>>>> What is THAT? >>>>> >>>>> is the lever position on defrost maybe? >>>>> >>>>> I think the compressor runs when the defrost is selected. >>>>> >>>>> Just a guess of course. >>>> >>>> No. With the output switched to the front vents. >>>> >>>> >>>> Speaking of those, this car doesnt have what I call the "crotch vent" >>>> under >>>> the steering wheel, that the 93 has. It's shame because that really >> cools >>>> my >>>> thighs when I wear shorts in the summer. >>>> >>>> -- >>> >>> >>> If _that_ needs to be cooled while you're driving, you're not keepng >>> your >>> mind on driving. >> >> LOL. It's summer, and when wearing shorts, blowing cool air on the thighs >> cools the whole body. :) >> > > When I do that, they call my parole officer, especially when I drive > through the parking lot at the supermarket. You women have it so easy ... > > PS I'm kidding, I went off parole years ago ..
From: Jeff Strickland on 9 Apr 2010 12:41 "Ray O" <rokigawa(a)NOSPAMtristarassociates.com> wrote in message news:hpnj3m$e2n$1(a)news.eternal-september.org... > > "Jane Galt" <Jane_G(a)gulch.xyz> wrote in message > news:Xns9D54F05D8740FJaneGgulchxyz(a)216.196.97.142... >> "Ray O" <rokigawa(a)NOSPAMtristarassociates.com> wrote : >> >>> >>> "Jane Galt" <Jane_G(a)gulch.xyz> wrote in message >>> news:Xns9D53E0621E3DFJaneGgulchxyz(a)216.196.97.142... >>>>>> >>>>> >>>>> If the vents are set to the front outlets and down on the feet, the >>>> system >>>>> is not in the defrost mode and it is unlikely that the compressor is >>>>> engaging. The easy way to check whether or not the compressor clutch >>>>> is engaging or not is to open the hood and look at the compressor >>>>> while the engine is idling. When the AC button is pushed, you'll see >>>>> the clutch >>>> pop. >>>> >>>> Just couldnt figure why I was hearing ANY change when merely turning >>>> the fan on low, without the compressor on. >>>> >>>> >>>> -- >>>> Jane Galt >>>> >>> The fan puts roughly the same load on the car's charging system at all >>> fan speeds other than off. At low fan speed, current flows through >>> resistors before it gets to the fan motor. At high fan speed, there is >>> less resistance but the fan motor draws more. >>> >>> Your air purifier is probably drawing at least 10 amps, >> >> Dont have one in the 2002 yet. >> >>> and added to the >>> fan and whatever else you may have been using like a radio, headlights, >>> fuel pump, ignition system, wipers, rear defogger, and other equipment >>> like a GPS, inverter for a laptop, etc. and the charging system has to >>> do some work. >> >> No, this is in idle and the only heard difference is when I switch the >> fan >> on, to low. >> >>> When there is a heavier load on the alternator, the engine has to work a >>> little harder to turn it. The extra load drops the engine RPM a bit, >>> the engine control computer notes the drop in RPM and adjusts the idle >>> speed back to where it should be. The engine RPM variation is basically >>> the same thing that happens when the AC compressor clutch is energized >>> so it may have sounded the same to you. The difference is, with the >>> hood open, you can usually hear an audible click when the compressor >>> clutch is energized. >> >> THis is inside, with hood closed. >> >> >> -- >> Jane Galt >> > Noise, vibrations, and sounds are difficult to identify without > experiencing them first hand, but if you are hearing a click inside the > passenger compartment when you turn on the fan, my guess is that you are > hearing a relay clicking. > -- This sounds like one of those problems where the service tech reaches in and spins the Volume dial a little until the mystery noise goes away. All noises are not indicators of a problem.
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