Jimmy AC unnecessarily on???
Question:
I just wanted to know if my Air Conditioning is actually on or off. I have a 2000 GMC Jimmy and I have the air con control in the off position, but I have noticed that the silver cylindrical shaped object under the hood on the passenger side (sorry I don’t know the technical name for this part), is very very cold, and when I stop and park my truck, especially on a hot day, I have noticed that condensation forms and water drips to the ground. I understand the water is normal after using the air con and parking, but is it also normal if I actually have the AC control off? Is the silver shaped part always supposed to get cold like that? Just some additional info, I have the AC OFF, but the setting is currently with the windshield vent and leg vents open. Also, at the same time, I have noticed that the belt (I think its called the compressor) has also been cycling on and off. Normal? Any help about whether this is normal would be appreciated.
Response:
On my 94 (old style) the a/c isn’t actually off unless all the vents are in the closed position. The fan switch being in the lowest setting isn’t "off" uless it’s labed as such. The compressor is cycling which will cause the freon to compress and cool, so yes, the canister (it’s the accumulator) will get cold and humidity from the air will condense on it… – Hide quoted text — Show quoted text – > I just wanted to know if my Air Conditioning is actually on or off. I have > a 2000 GMC Jimmy and I have the air con control in the off position, but I > have noticed that the silver cylindrical shaped object under the hood on the > passenger side (sorry I don’t know the technical name for this part), is > very very cold, and when I stop and park my truck, especially on a hot day, > I have noticed that condensation forms and water drips to the ground. > I understand the water is normal after using the air con and parking, but is > it also normal if I actually have the AC control off? Is the silver shaped > part always supposed to get cold like that? > Just some additional info, I have the AC OFF, but the setting is currently > with the windshield vent and leg vents open. > Also, at the same time, I have noticed that the belt (I think its called the > compressor) has also been cycling on and off. Normal? > Any help about whether this is normal would be appreciated.
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Response:
Thanks for your help. I also got a post on another board telling me that the AC is actually on to dehumidify if I have the defroster/windshield vent on. In this case, would turning the switch to the OFF position increase fuel mileage? or should it be somewhat negligible and unnoticeable? – Hide quoted text — Show quoted text – > On my 94 (old style) the a/c isn’t actually off unless all the vents are in the > closed position. The fan switch being in the lowest setting isn’t "off" uless > it’s labed as such. The compressor is cycling which will cause the freon to > compress and cool, so yes, the canister (it’s the accumulator) will get cold and > humidity from the air will condense on it… > I just wanted to know if my Air Conditioning is actually on or off. I have > a 2000 GMC Jimmy and I have the air con control in the off position, but I > have noticed that the silver cylindrical shaped object under the hood on the > passenger side (sorry I don’t know the technical name for this part), is > very very cold, and when I stop and park my truck, especially on a hot day, > I have noticed that condensation forms and water drips to the ground. > I understand the water is normal after using the air con and parking, but is > it also normal if I actually have the AC control off? Is the silver shaped > part always supposed to get cold like that? > Just some additional info, I have the AC OFF, but the setting is currently > with the windshield vent and leg vents open. > Also, at the same time, I have noticed that the belt (I think its called the > compressor) has also been cycling on and off. Normal? > Any help about whether this is normal would be appreciated. > — > Reach me by ICQ. My ICQ# is 8023912 or, > * Send me E-mail Express directly to my computer screen
– Hide quoted text — Show quoted text -> Download ICQ at http://www.icq.com/download/ > For adding similar signatures to your e-mail go to: > http://www.icq.com/email/emailsig.html
Response:
Yes, in modern cars, the a/c system turns on whenever you select "Defrost." It does help dehumidify the incoming air. Yes, your engine will burn less gas with the a/c system (compressor) off (an operating compressor creates a load on the engine). Don’t know that you will actually notice much of a decrease in gas consumption however. John Learn about automotive coolants and refrigerants at: http://www.imcool.com/ http://www.imcool.com/articles/aircondition/index.html
– Hide quoted text — Show quoted text -> Thanks for your help. I also got a post on another board telling me that > the AC is actually on to dehumidify if I have the defroster/windshield vent > on. > In this case, would turning the switch to the OFF position increase fuel > mileage? or should it be somewhat negligible and unnoticeable?
Response:
I’ve found a/c doesn’t affect the mileage that much. I got 22 MPG on the highway with the a/c on, though I was only doing 60… – Hide quoted text — Show quoted text – > Thanks for your help. I also got a post on another board telling me that > the AC is actually on to dehumidify if I have the defroster/windshield vent > on. > In this case, would turning the switch to the OFF position increase fuel > mileage? or should it be somewhat negligible and unnoticeable? > On my 94 (old style) the a/c isn’t actually off unless all the vents are > in the > closed position. The fan switch being in the lowest setting isn’t "off" > uless > it’s labed as such. The compressor is cycling which will cause the freon > to > compress and cool, so yes, the canister (it’s the accumulator) will get > cold and > humidity from the air will condense on it… > > I just wanted to know if my Air Conditioning is actually on or off. I > have > > a 2000 GMC Jimmy and I have the air con control in the off position, but > I > > have noticed that the silver cylindrical shaped object under the hood on > the > > passenger side (sorry I don’t know the technical name for this part), is > > very very cold, and when I stop and park my truck, especially on a hot > day, > > I have noticed that condensation forms and water drips to the ground. > > I understand the water is normal after using the air con and parking, > but is > > it also normal if I actually have the AC control off? Is the silver > shaped > > part always supposed to get cold like that? > > Just some additional info, I have the AC OFF, but the setting is > currently > > with the windshield vent and leg vents open. > > Also, at the same time, I have noticed that the belt (I think its called > the > > compressor) has also been cycling on and off. Normal? > > Any help about whether this is normal would be appreciated. > — > Reach me by ICQ. My ICQ# is 8023912 or, > * Send me E-mail Express directly to my computer screen > Download ICQ at http://www.icq.com/download/ > For adding similar signatures to your e-mail go to: > http://www.icq.com/email/emailsig.html
– Reach me by ICQ. My ICQ# is 8023912 or, Download ICQ at http://www.icq.com/download/ For adding similar signatures to your e-mail go to: http://www.icq.com/email/emailsig.html
Response:
> Thanks for your help. I also got a post on another board telling me that > the AC is actually on to dehumidify if I have the defroster/windshield vent > on. > In this case, would turning the switch to the OFF position increase fuel > mileage? or should it be somewhat negligible and unnoticeable?
<cut> If you want to save that extra sip of gas, select "heater" or "vent" settings. These are the only two (besides "off") that don’t activate the compressor. A small flow will still be directed to the windshield. -bc
Response:
Most late model GM vehicles also have a button under the control dials that says A/C. if this is on, you will have the system operating in A/c sometimes this is forgotten about. you should have little decrease in mileage, depending how you drive. defrost will automatically engage the compressor. shawn — Inexpensive Car Audio and More http://mobilethunder.vstoreauto.com/
– Hide quoted text — Show quoted text -> I just wanted to know if my Air Conditioning is actually on or off. I have > a 2000 GMC Jimmy and I have the air con control in the off position, but I > have noticed that the silver cylindrical shaped object under the hood on the > passenger side (sorry I don’t know the technical name for this part), is > very very cold, and when I stop and park my truck, especially on a hot day, > I have noticed that condensation forms and water drips to the ground. > I understand the water is normal after using the air con and parking, but is > it also normal if I actually have the AC control off? Is the silver shaped > part always supposed to get cold like that? > Just some additional info, I have the AC OFF, but the setting is currently > with the windshield vent and leg vents open. > Also, at the same time, I have noticed that the belt (I think its called the > compressor) has also been cycling on and off. Normal? > Any help about whether this is normal would be appreciated.
