parasitic draw

[Jef]

Roof of MG4 in the frost this morning, anyone else had this?

 

[Ian Key]

Could be a bit of contamination dropped by a bird or a grain of salt

 

[Jef]

It's above the interior light and emergency assist unit, and has happened every frosty morning, but not before connecting with the ismart app.

 

[Simler51]

It's above the interior light and emergency assist unit, and has happened every frosty morning, but not before connecting with the ismart app.

Are you charging your vehicle? Perhaps there is some protective circuitry or an overload in that spot.

 

[Jef]

Are you charging your vehicle? Perhaps there is some protective circuitry or an overload in that spot.

No, not being charged

 

[Simler51]

Ok you said it only occurs when you connect to iSMART to defrost/demist? So like I said I wonder if something comes on up in the roof area?

 

[Jef]

Ok you said it only occurs when you connect to iSMART to defrost/demist? So like I said I wonder if something comes on up in the roof area?

I am guessing that perhaps the unit above the interior light handles internet connection, hence has a processor producing enough heat to melt the morning frost coating. I have not read anything about a similar thing happening to other vehicles but I cannot be the only owner parking outside, and no the cabin had not been pre-heated before I took the picture but iSMART had been used about half an hour previously to check the outside temperature.
Car is MG4 SE SR.

 

[Simler51]

I agree - but you really would not notice it if there was no frost - and unless you were looking from an upstairs window, which I assume you are, it would not be seen. Remember, your home internet hub get warm so could be the answer.

 

[Cocijo]

Is It a roof heater for little birdies to warm their cold feet on a frosty day?

 

[Simler51]

Is It a roof heater for little birdies to warm their cold feet on a frosty day?

Don’t be silly - it’s a tiny alien ? saucer that landed on the roof of his car! They came to invade but when they saw our superior technology in car building - they left in a hurry just leaving the burner marks from liftoff.

And it was too cold for them!!!

 

[Cocijo]

Took one look at the software and straight back home!

 

[dragon2611]

Cellular modem/antenna perhaps?

 

[DGinUK]

Cellular modem/antenna perhaps?

dont think that its in the roof, think thats located in rear windows (lower half of window) ?

 

[Cocijo]

Is it just where a support joins the roof? This would defrost quicker than other areas. On the pic the edges have already started to defrost.

 

[siteguru]

dont think that its in the roof, think thats located in rear windows (lower half of window) ?

I thought that was the radio aerial?

 

[TheArcher]

Don’t be silly - it’s a tiny alien ? saucer that landed on the roof of his car! They came to invade but when they saw our superior technology in car building - they left in a hurry just leaving the burner marks from liftoff.

And it was too cold for them!!!

Batteries not included!