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  • FIRST POST
    • JohnB47
    • By JohnB47 12th Oct 17, 6:02 PM
    • 902Posts
    • 284Thanks
    JohnB47
    I'm new to air con. General advice?
    • #1
    • 12th Oct 17, 6:02 PM
    I'm new to air con. General advice? 12th Oct 17 at 6:02 PM
    OK, I've just been dragged into the 21st Century, having bought a 2014 car with electric everything and air con, not to mention climate control! So I'm going to be asking some basic questions.

    For a start, air con (AC). My handbook says to 'run' the AC at least once a week during cold weather. 'Run for at least 10 minutes with the engine at normal operating temperature'. This 'circulates the oil contained in the refrigerant'.

    When it says 'run', does this mean not just switched on but with the temperature turned down sufficient to make it actually operate? Or does just turning it on pump the refrigerant around?

    Thanks.
Page 1
    • daveyjp
    • By daveyjp 12th Oct 17, 6:17 PM
    • 7,197 Posts
    • 5,602 Thanks
    daveyjp
    • #2
    • 12th Oct 17, 6:17 PM
    • #2
    • 12th Oct 17, 6:17 PM
    If it has climate press the auto button and the car will use aircon when needed. Alternatively switch the aircon on and leave the button alone. Alter the temperature as you would normally.

    Aircon is just as useful for demisting in winter as it is for cooling in summer.
    • Iceweasel
    • By Iceweasel 12th Oct 17, 6:19 PM
    • 4,264 Posts
    • 3,116 Thanks
    Iceweasel
    • #3
    • 12th Oct 17, 6:19 PM
    • #3
    • 12th Oct 17, 6:19 PM
    If it has climate press the auto button and the car will use aircon when needed. Alternatively switch the aircon on and leave the button alone. Alter the temperature as you would normally.

    Aircon is just as useful for demisting in winter as it is for cooling in summer.
    Originally posted by daveyjp
    I agree - I never switch the Climate Control off.
    • JohnB47
    • By JohnB47 12th Oct 17, 6:33 PM
    • 902 Posts
    • 284 Thanks
    JohnB47
    • #4
    • 12th Oct 17, 6:33 PM
    • #4
    • 12th Oct 17, 6:33 PM
    If it has climate press the auto button and the car will use aircon when needed. Alternatively switch the aircon on and leave the button alone. Alter the temperature as you would normally.

    Aircon is just as useful for demisting in winter as it is for cooling in summer.
    Originally posted by daveyjp
    Thanks, but that's not really getting to the nub of my question. If it's winter (say, 9 degrees outside) and I switch the AC on and select a temp of 20 degrees, the AC won't activate - the heater will.

    So what I'm asking is, does this count as 'running' the AC? Or would I have to switch AC on and select 'Lo' as a temperature - and suffer a cold interior for 10 minutes?
    • wgl2014
    • By wgl2014 12th Oct 17, 6:34 PM
    • 421 Posts
    • 250 Thanks
    wgl2014
    • #5
    • 12th Oct 17, 6:34 PM
    • #5
    • 12th Oct 17, 6:34 PM
    +1 Just leave it on at your desired temperature.
    • tykesi
    • By tykesi 12th Oct 17, 6:54 PM
    • 1,858 Posts
    • 2,581 Thanks
    tykesi
    • #6
    • 12th Oct 17, 6:54 PM
    • #6
    • 12th Oct 17, 6:54 PM
    Thanks, but that's not really getting to the nub of my question. If it's winter (say, 9 degrees outside) and I switch the AC on and select a temp of 20 degrees, the AC won't activate - the heater will.

    So what I'm asking is, does this count as 'running' the AC? Or would I have to switch AC on and select 'Lo' as a temperature - and suffer a cold interior for 10 minutes?
    Originally posted by JohnB47
    Itís a common misconception that air conditioning is just for blowing cold air. Having the air con on while the temperature is up will bring warm but more importantly dry air into the cabin therefore making de-misting much quicker in the winter. As everyone has said, leave the climate control on permanently and leave the car to sort itself once youíve selected the temperature. The posters above were telling you that because they know how it works, not to avoid your question.
    £2017 in 2017 - £6362.49
    • Iceweasel
    • By Iceweasel 12th Oct 17, 7:13 PM
    • 4,264 Posts
    • 3,116 Thanks
    Iceweasel
    • #7
    • 12th Oct 17, 7:13 PM
    • #7
    • 12th Oct 17, 7:13 PM
    Thanks, but that's not really getting to the nub of my question. If it's winter (say, 9 degrees outside) and I switch the AC on and select a temp of 20 degrees, the AC won't activate - the heater will.

    So what I'm asking is, does this count as 'running' the AC? Or would I have to switch AC on and select 'Lo' as a temperature - and suffer a cold interior for 10 minutes?
    Originally posted by JohnB47
    Yes that would count as running the AC/Climate Control.

    But that would only be necessary if you turn the AC off - which we are all advising you not to do.

    Once they have seen the benefits most folks leave it on all the time.

    The clue is in the name Air Conditioning - it's not just Air Cooling.

    If you select AC at 20degrees with the outside temperature at 9 degrees the AC will be working - the air you get will be at 20degrees after the AC has dried it. That is why you may see water (condensate) dripping from the undersides of the car.

    Leave it on at all times and you have dry air in the car at whatever temperature you have selected.

    What car is this anyway?
    • knightstyle
    • By knightstyle 12th Oct 17, 7:23 PM
    • 4,486 Posts
    • 1,650 Thanks
    knightstyle
    • #8
    • 12th Oct 17, 7:23 PM
    • #8
    • 12th Oct 17, 7:23 PM
    As this is MSE remember that having the aircon on will use slightly more fuel.
    Personally I leave it off almost all the time, just using it for de-misting and when it is really hot.
    I find stepping out of an air conditioned car on a hot muggy day uncomfortable and I am sure I get less colds than friends who have it on all the time.
    • worried jim
    • By worried jim 12th Oct 17, 7:24 PM
    • 8,770 Posts
    • 13,391 Thanks
    worried jim
    • #9
    • 12th Oct 17, 7:24 PM
    • #9
    • 12th Oct 17, 7:24 PM
    Always smile when I see a sprog bus with the windows misted up driving past, just turn the climate on and enjoy a safer pleasant journey.
    "Only two things are infinite-the universe and human stupidity, and I'm not so sure about the universe"
    Albert Einstein
    • gardner1
    • By gardner1 12th Oct 17, 7:28 PM
    • 2,239 Posts
    • 3,314 Thanks
    gardner1
    just select temp and leave it on all year round....mine stays on low setting most of the year but turned up a notch during summer
    makes no difference whatsoever on MPG
    • JohnB47
    • By JohnB47 12th Oct 17, 9:03 PM
    • 902 Posts
    • 284 Thanks
    JohnB47
    Yes that would count as running the AC/Climate Control.

    But that would only be necessary if you turn the AC off - which we are all advising you not to do.

    Once they have seen the benefits most folks leave it on all the time.

    The clue is in the name Air Conditioning - it's not just Air Cooling.

    If you select AC at 20degrees with the outside temperature at 9 degrees the AC will be working - the air you get will be at 20degrees after the AC has dried it. That is why you may see water (condensate) dripping from the undersides of the car.

    Leave it on at all times and you have dry air in the car at whatever temperature you have selected.

    What car is this anyway?
    Originally posted by Iceweasel
    Cheers.

    Its a Honda Jazz. I switched from Toyota cos they'd changed the body shape and a couple of dealers just didn't get back to me. Curious. You'd think that if you show the slightest interest and give them your contact details that'd be all over you, but no.

    This is all very interesting. I thought AC was simply air cooling. But you're saying that, even if I turn it on and have the heater working, the AC is still working? I can't get my head around that.

    I'm not doubting you but I need to do more investigating of this -
    just for interest sake.

    So using AC doesn't use that much fuel then?

    Thanks to all others for their replies.
    • thescouselander
    • By thescouselander 12th Oct 17, 9:03 PM
    • 5,303 Posts
    • 4,853 Thanks
    thescouselander
    I agree - leave it on auto. A lot of cars have an eco setting which reduces the duty cycle of the compressor in cool conditions so the additional costs are minimal.
    • JohnB47
    • By JohnB47 12th Oct 17, 9:07 PM
    • 902 Posts
    • 284 Thanks
    JohnB47
    just select temp and leave it on all year round....mine stays on low setting most of the year but turned up a notch during summer
    makes no difference whatsoever on MPG
    Originally posted by gardner1
    So, when you say yours is set on low setting but turned up a notch during summer, I'm not sure what you mean.

    Apart from Climate Control (which is a bit more complicated) mine has an on/off switch and a temperature setting.

    What sort of settings do you mean? Are you talking about a temperature setting or something else?
    • Iceweasel
    • By Iceweasel 12th Oct 17, 9:19 PM
    • 4,264 Posts
    • 3,116 Thanks
    Iceweasel
    This might help explain things:

    http://www.raccars.co.uk/news/what-is-the-difference-between-air-con-and-climate-control
    • mobileron
    • By mobileron 13th Oct 17, 7:38 AM
    • 40 Posts
    • 18 Thanks
    mobileron
    I believe the terminology AC is wrong,that takes u back 10 years when all we had was an on/off switch.
    Now we have climate control,it will monitor the inside of the car and decide what to do,as we are not capable of doing this? Please just set temp at 20/22 and see those windows clear on cold days.

    The cost of fuel is minimal re the cost of dried up seals and have it regassed every 3 years.
    • n217970
    • By n217970 13th Oct 17, 7:58 AM
    • 243 Posts
    • 178 Thanks
    n217970
    Turning the AC off on my car saves around 10% in fuel - thats about £200 a year for me. Don't get me wrong if its hot/raining I turn it back on but on a dry day at this time of the year its just a drain on fuel.
    • bigadaj
    • By bigadaj 13th Oct 17, 8:04 AM
    • 10,803 Posts
    • 7,100 Thanks
    bigadaj
    I believe the terminology AC is wrong,that takes u back 10 years when all we had was an on/off switch.
    Now we have climate control,it will monitor the inside of the car and decide what to do,as we are not capable of doing this? Please just set temp at 20/22 and see those windows clear on cold days.

    The cost of fuel is minimal re the cost of dried up seals and have it regassed every 3 years.
    Originally posted by mobileron
    Some cars have climate control, some have air conditioning and some have neither.
    • Gloomendoom
    • By Gloomendoom 13th Oct 17, 8:50 AM
    • 13,259 Posts
    • 17,477 Thanks
    Gloomendoom
    Turning the AC off on my car saves around 10% in fuel - thats about £200 a year for me. Don't get me wrong if its hot/raining I turn it back on but on a dry day at this time of the year its just a drain on fuel.
    Originally posted by n217970
    I doubt 10% is typical.

    I have had cars with climate control since the early 90's and the measured effect on fuel consumption has been negligible if even detectable. I have stopped bothering to worry about it now and it's set on auto all the time. However, my cars have all had engines at the larger end of the scale. My cousin had an aircon equipped Daewoo Matiz that would stall if he turned the aircon on at idle.
    Advice; it rhymes with mice. Advise; it rhymes with wise.
    • BeenThroughItAll
    • By BeenThroughItAll 13th Oct 17, 10:10 AM
    • 4,614 Posts
    • 4,041 Thanks
    BeenThroughItAll
    Some cars have climate control, some have air conditioning and some have neither.
    Originally posted by bigadaj


    But one can't have climate control without the ability to condition the air using cooling, otherwise you'd only be able to control the climate to at or above ambient temperature.
    • neilmcl
    • By neilmcl 13th Oct 17, 10:17 AM
    • 10,294 Posts
    • 7,223 Thanks
    neilmcl
    Turning the AC off on my car saves around 10% in fuel - thats about £200 a year for me. Don't get me wrong if its hot/raining I turn it back on but on a dry day at this time of the year its just a drain on fuel.
    Originally posted by n217970
    What car is that? I would say 10% is unlikely. Driving around under 30mph with the windows open can use just as much fuel than older cars using aircon. Using climate control on mine has little impact on my fuel economy as is the case with most modern vehicles particularly with modern start/stop and economy systems.

    You doing your car more harm than good if you don't run your air conditioning system over the long term.
    Last edited by neilmcl; 13-10-2017 at 10:20 AM.
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