MG7 Heater Control Unit a bit gusty

DaPol · 30th April 2017, 14:37

Has anybody else who's fitted the MG7 heater controls found that the cars climate control has become a bit gusty where it'll occasionally just blow a gale in your face for 2 seconds when it gets warm, and then briefly roast your feet when it gets cold?

It does seem that (compared to the 2 other cars, and to the MGR original unit) the MG7 unit isn't so good at the proportional mixing that is needed to put out a given temperature from the heater.

I mean, it looks lovely, but I'm considering going back to the old unit because I'm finding it distracting driving with this sort of gustiness - if I wanted that I'd buy a TF and drop the lid!

Yorkshire GOC · 30th April 2017, 14:49

Hi I fitted an MG 7 climate control unit but found the the display far too dim especially in direct sunlight -so swopped it out for a blue MGR one - i may refit if I can get the luminosity increased - as to the temperature control it seemed fine.

Chilljohn · 30th April 2017, 19:33

it doesn't get a reading from the solar cell either so doesn't compensate like the oem one also I found the fan control surges in speed slightly when on low speed I had 4 in all and they all did it

and as above display to dim also its constantly rearranges a setting put car on 2ng ig and listen to blend motors always moving

stevenkeyte · 30th April 2017, 20:26

Yes, I noticed it the other week, I noticed that if you watch the display as the fan is surging, the settings change from eternal air to recirculate and the direction of airflow also changes, goes from footwell to dash vents and back again, then after a few minutes of this behaviour it seems to settle down again,

Steve

suzublu · 30th April 2017, 20:42

Took mine out after a week, couldn't see it

Prefer the oem

T-Cut · 30th April 2017, 21:09

Quote:

Originally Posted by Yorkshire GOC

Hi I fitted an MG 7 climate control unit but found the the display far too dim especially in direct sunlight -so swopped it out for a blue MGR one - i may refit if I can get the luminosity increased - as to the temperature control it seemed fine.

Mine (after three tries) was still too dim to see during the day in anything but dull conditions. The screen backlighting on the MG7 is less direct than in the MGR unit and there's no simple way to increase it if you want to retain the amber lighting. Klarzy reckons replacing them with blue LEDs actually increases the brightness. I suspect it's as much about perception than light increase. Anyway, with all miniature SMD circuitry there's not much else you can do about it other than to install an independant backlighting system. That's what I've done anyway and it's pretty drastic to say the least. Certainly it's not for the faint hearted or ham-fisted to tackle.

The light guide type dispersive/reflective filter located under the LCD screen was dispensed with. The complete screen holder base was cut out to provide an open framework. On that I've fixed a thick plastic amber filter. The lighting is provided by no less than eighteen amber SMD LEDs on a custom made circuit board. This sits on top of the main board for the controller positioned beneath the frame. The original six LEDs still light up, but aren't involved.

This has its own separate power supply with an inline fuse and will come on with the ignition. On the bench it's most satisfactory. I simply have to get around to fitting it in the car.

TC

SCP440 · 30th April 2017, 21:17

I fitted one in my 260, within a mile I was sweating like I was in a furnace. All it did was put my heat to max even though the controls were set to max cold.

I got a full refund so no problem. The standard controllers seem to be interchangeable but the Chinese ones are obviously not compatible.

30th April 2017, 14:37	#1
DaPol Loves to post 75 CDTi Saloon Join Date: Jun 2010 Location: Bolton Posts: 302 Thanks: 47 Thanked 77 Times in 49 Posts	MG7 Heater Control Unit a bit gusty Has anybody else who's fitted the MG7 heater controls found that the cars climate control has become a bit gusty where it'll occasionally just blow a gale in your face for 2 seconds when it gets warm, and then briefly roast your feet when it gets cold? It does seem that (compared to the 2 other cars, and to the MGR original unit) the MG7 unit isn't so good at the proportional mixing that is needed to put out a given temperature from the heater. I mean, it looks lovely, but I'm considering going back to the old unit because I'm finding it distracting driving with this sort of gustiness - if I wanted that I'd buy a TF and drop the lid!

30th April 2017, 14:49	#2
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,061 Thanks: 1,842 Thanked 623 Times in 469 Posts	Hi I fitted an MG 7 climate control unit but found the the display far too dim especially in direct sunlight -so swopped it out for a blue MGR one - i may refit if I can get the luminosity increased - as to the temperature control it seemed fine. __________________ She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide.

30th April 2017, 19:33	#3
Chilljohn Posted a thing or two MG HS PHEV Join Date: Nov 2006 Location: Worksop Posts: 1,576 Thanks: 58 Thanked 80 Times in 75 Posts	it doesn't get a reading from the solar cell either so doesn't compensate like the oem one also I found the fan control surges in speed slightly when on low speed I had 4 in all and they all did it and as above display to dim also its constantly rearranges a setting put car on 2ng ig and listen to blend motors always moving __________________ John Free enable of digital speedo readout on message centre (takes 2 mins) Free Vis motor testing, via obd port courtesy of my delphi so no need to take anything apart, along with free code scan including abs and airbag message me for details Last edited by Chilljohn; 30th April 2017 at 19:38..

30th April 2017, 20:26	#4
stevenkeyte Loves to post Rover 75 2.5 auto saloon Join Date: Nov 2006 Location: Ramsbottom Posts: 439 Thanks: 111 Thanked 105 Times in 79 Posts	Yes, I noticed it the other week, I noticed that if you watch the display as the fan is surging, the settings change from eternal air to recirculate and the direction of airflow also changes, goes from footwell to dash vents and back again, then after a few minutes of this behaviour it seems to settle down again, Steve __________________ Born 22nd February 2005, 221st of 239 Starlight Silver 75 Contemporary SE 2.5 V6 automatic saloons built

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30th April 2017, 20:42	#5
suzublu This is my second home rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009 Location: Seaton Carew Posts: 26,906 Thanks: 65 Thanked 7,142 Times in 4,642 Posts	Took mine out after a week, couldn't see it Prefer the oem

30th April 2017, 21:17	#7
SCP440 I really should get out more....... MG ZT-T 260 Join Date: Feb 2016 Location: Witney Posts: 2,504 Thanks: 6 Thanked 910 Times in 571 Posts	I fitted one in my 260, within a mile I was sweating like I was in a furnace. All it did was put my heat to max even though the controls were set to max cold. I got a full refund so no problem. The standard controllers seem to be interchangeable but the Chinese ones are obviously not compatible.