Cold Air From Heater 2.5 Kv6 2001

myrova · 5th August 2008, 14:56

Despite the fact that L & R controls on the Climate control are set to HIGH ,the passengers side (foot or face level)allways blows ambient air temp,as does the rear vent.
Drivers side does blow warm air but its not as hot as most vehicles I have driven.The Haynes manual gives very little information on fault finding the heater side of C/Control so any ideas would be most welcome.

Regards Dan

stocktake · 5th August 2008, 15:15

What Temp is temp gauge showing on engine? Stats can stick.

Gazbar · 5th August 2008, 15:28

wouldn't adjusting the dial under the clock cure this?

http://www.the75andztclub.co.uk/foru...ead.php?t=1056

kaiser · 5th August 2008, 16:32

No, the adjuster under the clock is only there to provide cold air through the face vents even if the heater is on, although I have doubts above how effective this is. (Why anyone would have hot air in the face is beyond me btw.) It is a typical German thing with hot air to the head

and in none of my other cars is that possible.
As mentioned, it is possible that the water temperature is too low, owing to a stuck thermostat, or, alternatively, you could have an air-lock, or too little water in the cooling system. I would check that asap, as that can be nasty.
The heater element could also be partly blocked

However if you have cold in one side and hot in the other, there could be a fault with either the control or the monitoring.
Lastly, an odd one out, the waterpump not pumping as it should.

mantianak · 5th August 2008, 16:51

I would check fuses and resistors if the above isn't the cause. The resistor pack should be located in the air vent somewhere to disperse the heat generated and keep them cool. From my own experience (not from a 75 I should add) these resistors can burn out so some if not all fan speeds are disabled. Another reason to make sure the vent filters aren't too blocked

myrova · 6th August 2008, 14:23

Thanks for the ideas,the temperature gauge is normal(midway)and the fuses under the passengers footwell have been checked as have the underbonnet fuses a precaution.All seems fine.As for airlocks I have just replaced the coolant but it did the same thing prior to the coolant service.
Hope it can be fixed soon as my wife has chewed my ear so badly I will resemble Van Gogh !!!!!!!!.

Regards Dan

kaiser · 6th August 2008, 14:51

Firstly, forget about the temperature gauge. It is virtually useless as it will show normal for everything in between 75 and 115 degrees. It might as well have been painted on. And, secondly:
As for an air-lock, check your water regularly, I do it at least once a day, and make sure that you fill up to the marks on the side of the expansion box.
If you don't know it, these engines can loose water rapidly, so do not treat it like a normal car, where you forget it!
I have a little torch which I use to shine on top, while I check at the side.

I have found that to get all air out of the system, you might need a fairly long drive, and keep the heater open while you go.

Hope you find it before winter

Just check, and then check again!

miketata · 6th August 2008, 23:52

this is due to a blocked matrix heater on one side. Photos somewhere for removal and clean-out.

inneedofhelp · 7th August 2008, 19:41

i was just about to post a thread like this, mine does it too

5th August 2008, 14:56	#1
myrova Avid contributor rover 75 2.5 v6 Conn saloon Join Date: Feb 2008 Location: Perth,Western Australia Posts: 104 Thanks: 40 Thanked 5 Times in 3 Posts	Cold Air From Heater 2.5 Kv6 2001 Despite the fact that L & R controls on the Climate control are set to HIGH ,the passengers side (foot or face level)allways blows ambient air temp,as does the rear vent. Drivers side does blow warm air but its not as hot as most vehicles I have driven.The Haynes manual gives very little information on fault finding the heater side of C/Control so any ideas would be most welcome. Regards Dan

5th August 2008, 15:15	#2
stocktake Vis Whiz Rover 75 2.5 auto Saloon Join Date: Jun 2007 Location: LEEDS Posts: 20,593 Thanks: 2,057 Thanked 3,056 Times in 1,621 Posts	What Temp is temp gauge showing on engine? Stats can stick. __________________ Dave... Lost a few stones and a Gall Bladder and part of a bile duct and all of my dignity in the suppository incident

5th August 2008, 15:28	#3
Gazbar Regular poster Rover Club SE Tourer CDT '52 Join Date: Apr 2008 Location: Hebburn, Tyne & Wear Posts: 70 Thanks: 0 Thanked 0 Times in 0 Posts	wouldn't adjusting the dial under the clock cure this? http://www.the75andztclub.co.uk/foru...ead.php?t=1056 __________________ http://i281.photobucket.com/albums/k...DSC02042-1.jpg Club SE Tourer Last edited by Gazbar; 5th August 2008 at 15:30.. Reason: link found

5th August 2008, 16:32	#4
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	No, the adjuster under the clock is only there to provide cold air through the face vents even if the heater is on, although I have doubts above how effective this is. (Why anyone would have hot air in the face is beyond me btw.) It is a typical German thing with hot air to the headand in none of my other cars is that possible. As mentioned, it is possible that the water temperature is too low, owing to a stuck thermostat, or, alternatively, you could have an air-lock, or too little water in the cooling system. I would check that asap, as that can be nasty. The heater element could also be partly blocked However if you have cold in one side and hot in the other, there could be a fault with either the control or the monitoring. Lastly, an odd one out, the waterpump not pumping as it should.

5th August 2008, 16:51	#5
mantianak I really should get out more....... ZT 190+ Saloon Join Date: Nov 2006 Location: Poole Posts: 2,413 Thanks: 6 Thanked 22 Times in 21 Posts	I would check fuses and resistors if the above isn't the cause. The resistor pack should be located in the air vent somewhere to disperse the heat generated and keep them cool. From my own experience (not from a 75 I should add) these resistors can burn out so some if not all fan speeds are disabled. Another reason to make sure the vent filters aren't too blocked __________________ http://i35.photobucket.com/albums/d1..._signature.png

6th August 2008, 14:23	#6
myrova Avid contributor rover 75 2.5 v6 Conn saloon Join Date: Feb 2008 Location: Perth,Western Australia Posts: 104 Thanks: 40 Thanked 5 Times in 3 Posts	Cold Air From Heater 2.5 Kv6 2001 Thanks for the ideas,the temperature gauge is normal(midway)and the fuses under the passengers footwell have been checked as have the underbonnet fuses a precaution.All seems fine.As for airlocks I have just replaced the coolant but it did the same thing prior to the coolant service. Hope it can be fixed soon as my wife has chewed my ear so badly I will resemble Van Gogh !!!!!!!!. Regards Dan

6th August 2008, 14:51	#7
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	Firstly, forget about the temperature gauge. It is virtually useless as it will show normal for everything in between 75 and 115 degrees. It might as well have been painted on. And, secondly: As for an air-lock, check your water regularly, I do it at least once a day, and make sure that you fill up to the marks on the side of the expansion box. If you don't know it, these engines can loose water rapidly, so do not treat it like a normal car, where you forget it! I have a little torch which I use to shine on top, while I check at the side. I have found that to get all air out of the system, you might need a fairly long drive, and keep the heater open while you go. Hope you find it before winter Just check, and then check again!

6th August 2008, 23:52	#8
miketata Loves to post rover 75/jeep patriot crd Join Date: Nov 2006 Location: Brisbane Posts: 306 Thanks: 0 Thanked 0 Times in 0 Posts	this is due to a blocked matrix heater on one side. Photos somewhere for removal and clean-out.

7th August 2008, 19:41	#9
inneedofhelp Regular poster rover 75 Connoiseur 2.5 v6 auto Join Date: Dec 2007 Location: n. wales Posts: 54 Thanks: 0 Thanked 0 Times in 0 Posts	i was just about to post a thread like this, mine does it too