heater

scooterman · 22nd January 2023, 11:59

Hello, can anyone give me an answer to why I have lost heat coming out of passenger side air vents on my 1999 2ltr petrol 75. Thanks

SD1too · 22nd January 2023, 12:14

Hello Paul,

A forum search will reveal lots of reading on this subject. It's generally thought to be hard water deposits restricting the flow through the heater matrix on the passenger side. This is probably because the flow isn't across the matrix from one side to the other, it's between top and bottom and both flow and return connections are on the driver's side.

Simon

PetrolFeet · 24th January 2023, 15:35

Hi Scooterman,
Does air come out of the vents, but cold?
Same amount as the other side? Or is flow also reduced? If so, have you checked the cabin filter for that side?
Have you got climate control or the (far superior, IMHO) knobs?

scooterman · 24th January 2023, 17:55

Hello, the air coming out from the passenger side all of a sudden went cold the air on drivers vents is hot , I can hear flaps operating when adjusting controls. The blower output is good on both sides. Is there a flap that might have stuck that only allows cold air through? Thanks.

suzublu · 24th January 2023, 18:16

Heater matrix might be blocked. You'll need to disconnect the pipes, remove and clean out. If you look under the dash towards the centre console, you'll see the pipework �� https://www.the75andztclub.co.uk/for...ead.php?t=7515

Sent from my SM-A326B using Tapatalk

PetrolFeet · 25th January 2023, 10:12

Scooterman, do you have dual zone air conditioning, with the LED display and enough buttons to run an X-box, or the old analogue knobs you have to turn yourself?

scooterman · 25th January 2023, 18:38

LED display , its a 2ltr 1999 connoisseur auto petrol.

trikey · 25th January 2023, 19:13

Once the engine is a full operating temperature, hold the revs at 2.5 to 3k.. does the passenger side get hot then?

Sent from my SM-G780G using Tapatalk

Devilish · 25th January 2023, 22:38

If it happened all of a sudden my guess is it could be a blender fault, either actuator/servo, or linkage. Never had to address such an issue, but if I did that is where I would go. As for it always happens on the passenger side, well the door locks always fail to unlock, same thing, passenger side could be inferior to drivers side.

22nd January 2023, 11:59	#1
scooterman Newbie rover 75 saloon Join Date: Sep 2022 Location: greenhithe Posts: 12 Thanks: 0 Thanked 1 Time in 1 Post	heater Hello, can anyone give me an answer to why I have lost heat coming out of passenger side air vents on my 1999 2ltr petrol 75. Thanks

22nd January 2023, 12:14	#2
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,382 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	Hello Paul, A forum search will reveal lots of reading on this subject. It's generally thought to be hard water deposits restricting the flow through the heater matrix on the passenger side. This is probably because the flow isn't across the matrix from one side to the other, it's between top and bottom and both flow and return connections are on the driver's side. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

24th January 2023, 17:55	#4
scooterman Newbie rover 75 saloon Join Date: Sep 2022 Location: greenhithe Posts: 12 Thanks: 0 Thanked 1 Time in 1 Post	heater Hello, the air coming out from the passenger side all of a sudden went cold the air on drivers vents is hot , I can hear flaps operating when adjusting controls. The blower output is good on both sides. Is there a flap that might have stuck that only allows cold air through? Thanks.

24th January 2023, 18:16	#5
suzublu This is my second home rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009 Location: Seaton Carew Posts: 26,921 Thanks: 65 Thanked 7,142 Times in 4,642 Posts	Heater matrix might be blocked. You'll need to disconnect the pipes, remove and clean out. If you look under the dash towards the centre console, you'll see the pipework �� https://www.the75andztclub.co.uk/for...ead.php?t=7515 Sent from my SM-A326B using Tapatalk Last edited by suzublu; 24th January 2023 at 18:27..

25th January 2023, 19:13	#8
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,773 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	Once the engine is a full operating temperature, hold the revs at 2.5 to 3k.. does the passenger side get hot then? Sent from my SM-G780G using Tapatalk __________________ Lest we forget..

24th January 2023, 15:35	#3
PetrolFeet Regular poster rover 75 kv6 Join Date: Jan 2023 Location: Kettering Posts: 30 Thanks: 0 Thanked 0 Times in 0 Posts	Hi Scooterman, Does air come out of the vents, but cold? Same amount as the other side? Or is flow also reduced? If so, have you checked the cabin filter for that side? Have you got climate control or the (far superior, IMHO) knobs?

25th January 2023, 10:12	#6
PetrolFeet Regular poster rover 75 kv6 Join Date: Jan 2023 Location: Kettering Posts: 30 Thanks: 0 Thanked 0 Times in 0 Posts	Scooterman, do you have dual zone air conditioning, with the LED display and enough buttons to run an X-box, or the old analogue knobs you have to turn yourself?

25th January 2023, 18:38	#7
scooterman Newbie rover 75 saloon Join Date: Sep 2022 Location: greenhithe Posts: 12 Thanks: 0 Thanked 1 Time in 1 Post	LED display , its a 2ltr 1999 connoisseur auto petrol.

25th January 2023, 22:38	#9
Devilish Been round the block 75 Tourer Join Date: Apr 2009 Location: Cannock Posts: 4,125 Thanks: 3 Thanked 189 Times in 121 Posts	If it happened all of a sudden my guess is it could be a blender fault, either actuator/servo, or linkage. Never had to address such an issue, but if I did that is where I would go. As for it always happens on the passenger side, well the door locks always fail to unlock, same thing, passenger side could be inferior to drivers side. __________________ If at first you don't succeed, hide the evidence Last edited by Devilish; 25th January 2023 at 22:40..