Cabin temp display says 40 degrees, app says 13, heating doesn’t work!

[rdrr]

As subject says:

The external air temp display is saying 40+ degrees, the iSMART app says 13 (which is about right).

The heating will not heat - even on “Hi”.

Has made for a pretty uncomfortable drive to Cornwall this half term!

I’m posting here in the hope that someone knows some magic combination of buttons, service menus, reset procedures etc that will make it work again!

Ta!
Rob

We’re in Cornwall. Car thinks it’s in Africa

 

[Bricktop X PWR]

I would have instantly said external temperature sensor problem (much experience of said problem) but when mine failed, I had either extreme heat or Ice cold with nothing in between.

Still my problem started with spurious temperature readings so could be....

Thread 'Outside temperature reading, gone doolally.'

Feb 19, 2024

Ive done a search and come up short so....I've left this nearly a week hoping that the car might get a grip of itself.

It hasn't.

I noticed last week that my outside temperature reading was 29 degrees.

Every time I've used it since, it's been over 30.

Today when I went out to strip and clean my rear brakes, the car was at 34.
It was 11 here today.

I've done a soft reset several times to no avail.

I'm going to disconnect the battery next but thought I'd ask here first just in case someone has an answer?

R40 software from new.

• Bricktop X PWR
• mg4 temperature thermostat
• Replies: 138
• Forum: MG4 EV Forum

 

[ReintjeWA]

Is it me or is completely useless that the A/C controls seem to take the exterior temp in consideration? Surely all that should matter is the interior temp and then the system can decide what to do (heat or cool) to reach the requested temperature?

 

[rdrr]

For me, even “hi” blows cold. We’ll be buying blankets for the 4 hour drive home on Monday…

 

[rdrr]

I would have instantly said external temperature sensor problem (much experience of said problem) but when mine failed, I had either extreme heat or Ice cold with nothing in between.

Still my problem started with spurious temperature readings so could be....

Thread 'Outside temperature reading, gone doolally.'

Feb 19, 2024

Ive done a search and come up short so....I've left this nearly a week hoping that the car might get a grip of itself.

It hasn't.

I noticed last week that my outside temperature reading was 29 degrees.

Every time I've used it since, it's been over 30.

Today when I went out to strip and clean my rear brakes, the car was at 34.
It was 11 here today.

I've done a soft reset several times to no avail.

I'm going to disconnect the battery next but thought I'd ask here first just in case someone has an answer?

R40 software from new.

• Bricktop X PWR
• mg4 temperature thermostat
• Replies: 138
• Forum: MG4 EV Forum

Thanks for the response and linking the other thread. I did search, but there were just so many!

 

[rdrr]

To add insult to injury… the outside temp was saying 56 degrees, and the popup showed up saying “ambient temperatures are low, do you want to switch battery heating on”!

 

[mhoolahan]

As subject says:

The external air temp display is saying 40+ degrees, the iSMART app says 13 (which is about right).

The heating will not heat - even on “Hi”.

Has made for a pretty uncomfortable drive to Cornwall this half term!

I’m posting here in the hope that someone knows some magic combination of buttons, service menus, reset procedures etc that will make it work again!

Ta!
Rob

We’re in Cornwall. Car thinks it’s in Africa

is "economy" or "eco" enabled in the aircon settings by any chance. there will be no heat in this mode.

 

[Jto]

Have disconnected the 12v battery for 5 minutes then reconnect it to see if that resets the cars software. You will get so alarms but should clear.

 

[rabacon001]

As subject says:

The external air temp display is saying 40+ degrees, the iSMART app says 13 (which is about right).

The heating will not heat - even on “Hi”.

Has made for a pretty uncomfortable drive to Cornwall this half term!

I’m posting here in the hope that someone knows some magic combination of buttons, service menus, reset procedures etc that will make it work again!

Ta!
Rob

We’re in Cornwall. Car thinks it’s in Africa

Hi, I think this is the problem I had. Basically when the got the car (Version 1, Trophy Long Range) the heater would stop working after a short while, this was a known fault with a loose connection which the garage fixed. But then there was no relationship between the display and the actual cabin temperature. At the last service I reported this (again) and they did some software updates and this problem is now solved. The garage I use is Richmond MG Portsmouth who seem pretty much on the ball with software bugs. I am not aware that they changed any sensor though.

 

[Deleted member 2148]

It needs a software update.

 

[rdrr]

MG service centre said: it needs a new temp sensor,

They also did a software update which now means “Hi” actually works and pumps out heat now. So at least I have some heating till they replace the sensor!

 

[MattyS]

MG service centre said: it needs a new temp sensor,

They also did a software update which now means “Hi” actually works and pumps out heat now. So at least I have some heating till they replace the sensor!

do you know what version you were on previously out of interest? On my journey out today (got my car on Tuesday- today is 1st real trip out) I had AC on 23 and it was cool, not 23. Having said that, I did a pre heat before I got in the car to de ice it and that worked within 15 minutes....

 

[rdrr]

Not sure of the version number, it was a 1st gen 2023 uk trophy. Maybe R39? Now on R63.

 

[DrBabs]

As subject says:

The external air temp display is saying 40+ degrees, the iSMART app says 13 (which is about right).

The heating will not heat - even on “Hi”.

Has made for a pretty uncomfortable drive to Cornwall this half term!

I’m posting here in the hope that someone knows some magic combination of buttons, service menus, reset procedures etc that will make it work again!

Ta!
Rob

We’re in Cornwall. Car thinks it’s in Africa

Mines going in this week to be checked as the heating has never ‘heated’ I do a long drive once a week and it’s been a killer this winter