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AC switch comes on when i only want blower heat

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  • AC switch comes on when i only want blower heat

    Why does the AC switch light up when i put the heater blower on, for some reason it always comes on when i want heat only, Am i right in thinking the AC is only for blowing cold air, if i wanted the AC on i would press the button myself, maybe i have this all wrong, as my last car did not have the AC come on every time i just want heat.

  • #2
    AC can be used with heat for a 'drier' air to demist,my company van will auto bring it on if I have the vent set to demist or screen,you may also be in auto mode?
    Insignia Elite 16T,Royal Blue non Nav. + added,
    Heko Wind Deflectors,Alloy Pedal Covers.Led full Interior,Polished Alloy Door Pins,Osram Diadem Opel Rear indicator Bulbs,Led Reverse Light Upgrade,Gear Surround Red Leds,Led reg plate lights,Nighteye Fog lamp Bulbs,Osram Night Breaker Laser Cornering Bulbs,Rear Sunblinds,Nextbase 522GW front/rear window cam,upgraded front speakers,SS Exhaust,6000k Xenon Bulbs,Thinkdiag Diagnostic Tool

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    • #3
      Demisting works so much faster with the AC on, you don't want to do that with only hot air when you have AC available.

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      • #4
        Thanks Guys, it makes sense alright, to demist fairly fast when you need it, i might try putting the heater on, with the button directing air to the windscreen turned off, and see if the AC comes on automatically, as usually i just want a blast of hot air, with no need for demisting, and i always see the AC light on, i just press it off. i just wish it stayed off in normal heating mode.

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        • #5
          As above buddy......
          It's especially effective in winter.
          Demist on, windows slightly down, AC on and it clears frosty/icy windows so much quicker too.

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          • #6
            I've got the optional quick-heat system, that works also great. I think it's demisting almost as quick as a petrol powered car.

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            • #7
              I never turn my ac off. Just because the light is on doesn't mean its blowing cold air. If you're using the heating, all the ac will be doing is dehumidifying. I tend to set the temperature at 20-21 winter and summer unless its scorching hot in a summer then I'll setting it to Lo. Setting at around 21 with the ac on lets it blow hot and cold as needed.
              2017 Vauxhall Insignia Grand Sport Sri Nav 1.5 (165ps) Turbo petrol in Lava Red - Keyless entry and start - 18” five spoke alloy wheels - Front fog lights - Tinted rear windows - Aluminium sports pedals - Ambient interior led lighting - Front and rear parking assist - Active emergency braking - Forward collision assist - Front pedestrian alert - Traffic sign recognition - Lane keep assist - Cruise control - Speed warning and limiter - Voice recognition - Bluetooth - Duel zone climate control - Front and rear electric windows - High beam assist - Auto lights - Auto wipers - Wifi hotspot - 8” colour touchscreen Navi 900 with Android Auto, Apple Car Play and DAB

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              • #8
                Originally posted by marko301 View Post
                I never turn my ac off. Just because the light is on doesn't mean its blowing cold air. If you're using the heating, all the ac will be doing is dehumidifying. I tend to set the temperature at 20-21 winter and summer unless its scorching hot in a summer then I'll setting it to Lo. Setting at around 21 with the ac on lets it blow hot and cold as needed.
                Oooohhhhhhh no....switch it off.

                All that extra fuel your using

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                • #9
                  Originally posted by RBH View Post
                  Oooohhhhhhh no....switch it off.

                  All that extra fuel your using
                  5 weeks between fill ups. I probably use the least fuel on here

                  Nah it's good for the seals. One of the biggest problems people cause their air con is turning it off for the summer. There's more to it than just cooling. But you know all that cos you're pulling my pisser. It's good to let others know who may not though.
                  2017 Vauxhall Insignia Grand Sport Sri Nav 1.5 (165ps) Turbo petrol in Lava Red - Keyless entry and start - 18” five spoke alloy wheels - Front fog lights - Tinted rear windows - Aluminium sports pedals - Ambient interior led lighting - Front and rear parking assist - Active emergency braking - Forward collision assist - Front pedestrian alert - Traffic sign recognition - Lane keep assist - Cruise control - Speed warning and limiter - Voice recognition - Bluetooth - Duel zone climate control - Front and rear electric windows - High beam assist - Auto lights - Auto wipers - Wifi hotspot - 8” colour touchscreen Navi 900 with Android Auto, Apple Car Play and DAB

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                  • #10
                    Honestly over month I don't notice the difference with AC on or off. It left on all the time except every now and again I let the fan run on its own, was told it helps keeps system fresher.
                    Do miss heated front screen I had on Mondeo thou.


                    MATTG - 2016 - 2.0 ELITE 170
                    Usual Elite specification;Dancing lights, up/down windows, sliding seats, on board atlas, slippery seats, musical bumpers, storm detectors, tubeless radio, female knight rider communication system, all seeing windscreen, cherry air freshener, auto moaning passengers, learner driver, shiny door pins, rear boom box, Heko smoked window hats, rear window sunglasses, 10 million candle flame reversing lights, matching number plate lights, shiny pedals, front and rear all seeing eyes, fully integrated interrogation system, empty bank account .

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                    • #11
                      I too never switch it off. My car is already using so much diesel due to the automatic, the extra usage caused by the AC is not detectable.

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                      • #12
                        Originally posted by MattG View Post
                        Honestly over month I don't notice the difference with AC on or off. It left on all the time except every now and again I let the fan run on its own, was told it helps keeps system fresher.
                        Do miss heated front screen I had on Mondeo thou.
                        Buy another Mundano........bye......

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                        • #13
                          Originally posted by RBH View Post
                          Buy another Mundano........bye......
                          Or a new Insignia!

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                          • #14
                            Originally posted by Drew View Post
                            Or a new Insignia!
                            He's too tight

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                            • #15
                              Originally posted by RBH View Post
                              He's too tight
                              Money you have spent you could have had a 18 plate GS with the wheel's, heated seats, android auto, digital screen and more [emoji1787]


                              MATTG - 2016 - 2.0 ELITE 170
                              Usual Elite specification;Dancing lights, up/down windows, sliding seats, on board atlas, slippery seats, musical bumpers, storm detectors, tubeless radio, female knight rider communication system, all seeing windscreen, cherry air freshener, auto moaning passengers, learner driver, shiny door pins, rear boom box, Heko smoked window hats, rear window sunglasses, 10 million candle flame reversing lights, matching number plate lights, shiny pedals, front and rear all seeing eyes, fully integrated interrogation system, empty bank account .

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