Advice Please - Page 2

Teflon · 23rd August 2018, 19:37

Quote:

Originally Posted by roverbarmy

I think that it depends on the outside temperature. The control unit monitors the outside temperature (no point pulling very hot air in to cool the interior).

But that's exactly what it would be doing if it switched to Econ mode. Econ mode means compressor disengaged, which means no air cooling taking place, so no cabin cooling.

I think perhaps there's some confusion between "Econ" mode and the "Recirculation" function.

TOM, are you sure it's reverting to "Econ" and not "Recirculation" mode?

Cliff

OddSox · 23rd August 2018, 19:42

Quote:

Originally Posted by SD1too

You could be right Mike, but I don’t share your confidence in the logic of the ATC ECU. I’m sure you’ve noticed that when the car has been standing outside on a blisteringly hot day the interior is usually at a higher temperature than the ambient air. In these circumstances what does the control unit do? It selects ‘recirculating’ mode.

I’ve carried out a study of the ATC system in various conditions and I’m in no doubt that some degree of manual control is preferable most of the time.

Simon

Manual control?...How many times do i hear that...These days...Bah...

You wan't warm? Pull this lever...You wan cold?...Open a window...You wana music?...Yeah...I have a guitar in the boot..

So simple in the old day yes?

SD1too · 23rd August 2018, 19:51

Quote:

Originally Posted by OddSox

When in Econ Mode the Aircon is NOT actually switched off...

In ‘Econ’ mode the compressor is disabled isn’t it Mick. Surely that means that there is no air conditioning.

Simon

OddSox · 23rd August 2018, 19:53

Quote:

Originally Posted by SD1too

In ‘Econ’ mode the compressor is disabled isn’t it Mick. Surely that means that there is no air conditioning.

Simon

Correct...

KernowRover · 23rd August 2018, 19:54

Quote:

Originally Posted by Teflon

But that's exactly what it would be doing if it switched to Econ mode. Econ mode means compressor disengaged, which means no air cooling taking place, so no cabin cooling.

I think perhaps there's some confusion between "Econ" mode and the "Recirculation" function.

TOM, are you sure it's reverting to "Econ" and not "Recirculation" mode?

Cliff

Hi Cliff,
Just been out and checked again, when I switch on Auto (aircon on) the temp goes up to 16 on both sides and recirculation is switched off.
If I switch the temp to Lo on one or both sides auto switches off, recirculation switches on and the fan goes to maximum speed but econ does not appear on the screen.
Regards
Tom.

Teflon · 23rd August 2018, 19:59

Quote:

Originally Posted by KernowRover

Hi Cliff,
Just been out and checked again, when I switch on Auto (aircon on) the temp goes up to 16 on both sides and recirculation is switched off.
If I switch the temp to Lo on one or both sides auto switches off, recirculation switches on and the fan goes to maximum speed but econ does not appear on the screen.
Regards
Tom.

In which case, I think it's all working just as it should

Cheers,

Cliff

Mike Trident · 23rd August 2018, 22:11

when you drop down to under 16 doesn't it go into the maximum cooling mode and blows you back into the seat while it slowly freezes your eyeballs?

SD1too · 24th August 2018, 09:36

Quote:

Originally Posted by SD1too

In ‘Econ’ mode the compressor is disabled isn’t it Mick. Surely that means that there is no air conditioning.

Quote:

Originally Posted by OddSox

Correct...

Thanks Mick; I’m glad that we agree on that. So what exactly did you mean then when you wrote this in post no. 10?

Quote:

Originally Posted by OddSox

When in Econ Mode the Aircon is NOT actually switched off...

Simon

Comfortably Numb · 24th August 2018, 18:22

It makes sense that it will switch to recirculating when you switch to 'LO', as the system will be able to keep taking more heat out of the same air, and further reduce the cabin temperature. It took me a while to work out that 'ECON' couldn't cool the cabin below outside air temp. I thought my car was fitted with a magic 2-speed compressor!

23rd August 2018, 22:11	#17
Mike Trident Posted a thing or two Rover 75 CDTi Saloon & Citroen C1 Join Date: Jun 2016 Location: Oakenshaw, Near Bradford Posts: 1,624 Thanks: 385 Thanked 552 Times in 328 Posts	when you drop down to under 16 doesn't it go into the maximum cooling mode and blows you back into the seat while it slowly freezes your eyeballs? __________________ Rover 75 2.0 CDTi (131Ps) Conn SE Saloon. (Manual) 160 Remap, cruise control, electric window blind, temp gauge, Real walnut / ZT interior, FBH with GSM control. BORN Tuesday, 5th October 2004 @ 12:35:52 This vehicle was the 104,679th 75 to run off the production line, out of 112,381 This vehicle was the 3,318th 75 CDT Connoisseur SE (135) to be made out of 4,744 This vehicle was the 12,440th 75 in Starlight Silver (code: MBB) to be made out of 14,280 Starlight Silver 75s

24th August 2018, 18:22	#19
Comfortably Numb Posted a thing or two Rover 75 Saloon Join Date: Dec 2017 Location: Penrith Posts: 1,336 Thanks: 165 Thanked 303 Times in 241 Posts	It makes sense that it will switch to recirculating when you switch to 'LO', as the system will be able to keep taking more heat out of the same air, and further reduce the cabin temperature. It took me a while to work out that 'ECON' couldn't cool the cabin below outside air temp. I thought my car was fitted with a magic 2-speed compressor!