MG4 Trophy Heater Controls

24c Auto here seems to be ok but more like 20c in real life. What I find annoying: the automatic air cycle feature… My partner and I were driving back in the dark in heavy rain … and it continually decides (at random) to close the fresh air vent and the car steams up?? Agree with previous comments about cold feet.
 
24c Auto here seems to be ok but more like 20c in real life. What I find annoying: the automatic air cycle feature… My partner and I were driving back in the dark in heavy rain … and it continually decides (at random) to close the fresh air vent and the car steams up?? Agree with previous comments about cold feet.
Leave the AC on and it shouldn’t steam up, or turn off the auto recirc…
 
Leave the AC on and it shouldn’t steam up, or turn off the auto recirc…
Ac was on all the time. Guarantee any car will still steam up with AC on and recirculate air. It was just annoying how it kept deciding to do it!

Edit: Guarantee any MG4 will do it on Auto settings
 
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Ac was on all the time. Guarantee any car will still steam up with AC on and recirculate air. It was just annoying how it kept deciding to do it!
Guarantee my car doesn’t steam up with AC on and recirc air
 
Guarantee my car doesn’t steam up with AC on and recirc air
If the car is on auto ie fan speed slow as it’s reached nominal temp (24-4)C , 3 people in the car, cold outside… No fog - everything Ok.

And then the car decides to close the fresh air flap, you will get foggy windows.

Granted, if you turn up the blowers - it will disappear. Do MGs have a humidity sensor?

Never had this on any of my previous cars.
 
And then the car decides to close the fresh air flap, you will get foggy windows.
Incorrect, this does not happen to me, I do not get foggy windows with ac on when recirc activates either automatically or manually, the only exception is below 4 degrees centigrade when the ac switches off
 
Is it just you in the car?

From the manual, it states about internal recirculating - hence, when it auto closes - I get a misty screen!


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If the car is on auto ie fan speed slow as it’s reached nominal temp (24-4)C , 3 people in the car, cold outside… No fog - everything Ok.

And then the car decides to close the fresh air flap, you will get foggy windows.

Granted, if you turn up the blowers - it will disappear. Do MGs have a humidity sensor?

Never had this on any of my previous cars.
AC is a separate option from auto. The way AC works it defogs because it takes the humidity out of the air. If AC is working, and blower is on a medium or higher setting, it shouldn't be possible to fog up. It is possible that something is wrong with your car.

NB: AC is an option within the A/C system, which can be confusing.
 
Is it just you in the car?

From the manual, it states about internal recirculating - hence, when it auto closes - I get a misty screen!


View attachment 16445
Long drive to/in London on Sunday, raining all day, 3 people in car, ac on, recirc mostly active, no misting
 
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AC is a separate option from auto. The way AC works it defogs because it takes the humidity out of the air. If AC is working, and blower is on a medium or higher setting, it shouldn't be possible to fog up. It is possible that something is wrong with your car.

NB: AC is an option within the A/C system, which can be confusing.
I understand what AC is and how it works guys lol it’s always on in my car.

What I’m saying is that when:

fan speed goes down as it’s reached nominal temp
Raining outside and cold
the car decides to close the flap

I start getting mist. I don’t think there is enough volume of air going through the AC exchange. So I have to turn on the demist button as per manual above.

Normal cars detect this by humidity sensors in the cabin - does the MG4 have one ?
 
I understand what AC is and how it works guys lol it’s always on in my car.

What I’m saying is that when:

fan speed goes down as it’s reached nominal temp
Raining outside and cold
the car decides to close the flap

I start getting mist. I don’t think there is enough volume of air going through the AC exchange. So I have to turn on the demist button as per manual above.

Normal cars detect this by humidity sensors in the cabin - does the MG4 have one ?
Ok, so this is an issue with the 'auto' setting then. I don't know if it has a humidity sensor.
 
Ok, so this is an issue with the 'auto' setting then. I don't know if it has a humidity sensor.
I think this is the issue! A quick search on this forum site for misty windscreen - and it's not just the MG4. In my previous MB, it had a humidity sensor which would also manage fan speed / vent selection.

Granted that if it is raining outside, and you're getting a 3 year old + luggage into the car - you will all have wet clothes for the car to deal with. But again, the Humidity sensor in the cabin should deal with this issue :D

Everything on auto, temp set at 24 or 25 degrees (many MG4 need temp higher than you might expect, not sure if yours is one of them, I get no heat if set below 24 degrees)
Yep I do also have that issue! hence in my post above why I said (24-4)C :D
 
Yep I do also have that issue! hence in my post above why I said (24-4)C :D
So, no misting for me under those conditions, 3 adults, albeit with dry clothes (can’t vouch for humidity content of underwear at any given time.) I often use recirc and it’s one of the things I love about air con that I dont get misting. Every car I’ve had bar one was the same, no misting with recirc and a/c. I did have an issue with my i3, but that wasn’t recirc related, you could feel the a/c switch off when it shouldn’t and instant misting followed, had to switch a/c off and on again and it cleared instantly, never got it fixed as I sold it. My only exceptions are if it is very cold, under 4 degrees I think then the a/c switches off. Sometimes, if I’ve had recirc on for very long time, like over an hour I might get slight condensation eg in the summer, running cold a/c, raining outside, that sort of scenario but even then it’s very minor, usually just above the vents to the windscreen.

I wonder if you have a faulty sensor or poss water ingress, I know others have had that issue, windscreen seals have been faulty I believe
 

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