Thermostat?

Rev Jules · 23rd February 2017, 16:57

Just recently I spoke about heating in the car was atrocious, any way I t has now been suggested the thermostat is faulty, apparently the temperature of the circulation into the heater was low coming out at only 54 degrees back into the system, although the gauge reaches midway point quite quickly, so suggested the thermostat is faulty. It is a 2.5 V6.

Thoughts please.

Rev

COLVERT · 23rd February 2017, 19:28

By ---Midway Point----do you mean the 6 o'clock position ???

( Always use a clock face to indicate the pointer position. ) Makes it easier for us helpers. --

humptynumpty · 23rd February 2017, 19:37

9 o'clock u mean?

Rev Jules · 23rd February 2017, 19:42

Quote:

Originally Posted by COLVERT

By ---Midway Point----do you mean the 6 o'clock position ???

( Always use a clock face to indicate the pointer position. ) Makes it easier for us helpers. --

Sorry yes 9 o'clock.
Since when has the temp indicator been at 6 unless it's not registering at all?

Rev

COLVERT · 23rd February 2017, 19:54

Quote:

Originally Posted by Rev Jules

Sorry yes 9 o'clock.
Since when has the temp indicator been at 6 unless it's not registering at all?

Rev

Yes they all start there but some stop "half way" ( mid way point ) between the 6 and 9 o'clock position so tend to give the game away.----------

Rev Jules · 23rd February 2017, 20:02

Quote:

Originally Posted by COLVERT

Yes they all start there but some stop "half way" ( mid way point ) between the 6 and 9 o'clock position so tend to give the game away.----------

So what's your prognosis then, could it be the thermostat not opening properly causing no heat or at the best just warm,

Rev

Rev Jules · 23rd February 2017, 20:03

Quote:

Originally Posted by COLVERT

Yes they all start there but some stop "half way" ( mid way point ) between the 6 and 9 o'clock position so tend to give the game away.----------

So what's your prognosis then, could it be the thermostat not opening properly causing no heat or at the best just warm in the car.

Rev

Ps3000 · 23rd February 2017, 20:30

The temp gauge suffers from BMW's "clever" electronics whereby the scale isn't linear as you might expect. Once the coolant is in the range between 75C and 115C, the gauge will sit in the middle (9 O'Clock) and all will seem normal.

The gauge doesn't really tell you much about what's happening.

You can use the diagnostic mode to get the actual temp to display on the dash which will give a better picture.

Poor heating could be caused by lack of coolant, airlocks or a blocked heater matrix - or a thermostat stuck open.

Edited to add - it could also be faulty air flaps in the heater box.

bl52krz · 23rd February 2017, 20:41

Hi Jules. I would put my money on the thermostat.

kaiser · 24th February 2017, 06:47

Is this a joke, or what?
Surely you by now know how to display the temperature directly on the screen??
If that temperature is always low, then the thermostat does not close perfectly.

Is this the first of April??

If not, I have a solution for you.!

23rd February 2017, 16:57	#1
Rev Jules This is my second home Rover 75 Tourer+ Join Date: Mar 2011 Location: Radcliffe on Trent Posts: 10,711 Thanks: 7,308 Thanked 3,929 Times in 2,051 Posts	Thermostat? Just recently I spoke about heating in the car was atrocious, any way I t has now been suggested the thermostat is faulty, apparently the temperature of the circulation into the heater was low coming out at only 54 degrees back into the system, although the gauge reaches midway point quite quickly, so suggested the thermostat is faulty. It is a 2.5 V6. Thoughts please. Rev

23rd February 2017, 20:30	#8
Ps3000 Gets stuck in None at moment Join Date: May 2013 Location: Loughborough Posts: 899 Thanks: 230 Thanked 125 Times in 113 Posts	The temp gauge suffers from BMW's "clever" electronics whereby the scale isn't linear as you might expect. Once the coolant is in the range between 75C and 115C, the gauge will sit in the middle (9 O'Clock) and all will seem normal. The gauge doesn't really tell you much about what's happening. You can use the diagnostic mode to get the actual temp to display on the dash which will give a better picture. Poor heating could be caused by lack of coolant, airlocks or a blocked heater matrix - or a thermostat stuck open. Edited to add - it could also be faulty air flaps in the heater box. Last edited by Ps3000; 23rd February 2017 at 20:32..

23rd February 2017, 20:41	#9
bl52krz This is my second home Rover 75 cdt club + Rover 2.5 KV6 Conni SE Join Date: May 2008 Location: Birmingham Posts: 11,392 Thanks: 6,587 Thanked 2,262 Times in 1,729 Posts	Hi Jules. I would put my money on the thermostat. __________________ Great Barr, Birmingham.

24th February 2017, 06:47	#10
kaiser This is my second home 75 Tourer 2.5 Auto, 1.8T, 75V8ZT Join Date: Jun 2007 Location: Johannesburg ZA Posts: 6,200 Thanks: 1 Thanked 859 Times in 613 Posts	Is this a joke, or what? Surely you by now know how to display the temperature directly on the screen?? If that temperature is always low, then the thermostat does not close perfectly. Is this the first of April?? If not, I have a solution for you.! __________________ Worth his V8 in gold

23rd February 2017, 19:28	#2
COLVERT This is my second home R75 Saloon. Join Date: Feb 2009 Location: France/or Devon. Posts: 14,003 Thanks: 3,851 Thanked 2,167 Times in 1,816 Posts	By ---Midway Point----do you mean the 6 o'clock position ??? ( Always use a clock face to indicate the pointer position. ) Makes it easier for us helpers. --

23rd February 2017, 19:37	#3
humptynumpty Retired Health Join Date: Mar 2013 Location: GB Posts: 1,901 Thanks: 8 Thanked 46 Times in 42 Posts	9 o'clock u mean?