Heater, once more

Fille · 10th October 2008, 12:32

Is there a constant flow of coolant to the heater matrix, ie is the temperature controlled only with air mixing, or is there a valve before the matrix?

Simon · 10th October 2008, 18:37

I am led to believe that the heater set up in the 75/ZT (excluding the V8 models) are an air-blend type heater which would imply that there is a constant coolant feed to the matrix and it is the air that is blended 'over' this coolant with outside air that determines the resultant temperature at the vents.

The V8's use a different method due to the limited space. They use a water-blend system which I would assume alters the amount of coolant entering the matrix (a different one, mind) which determines the resultant amount of hot air outputted.

Of course, I am open to being correct on this.

Mike · 10th October 2008, 19:02

Quote:

Originally Posted by Simon

I am led to believe that the heater set up in the 75/ZT (excluding the V8 models) are an air-blend type heater which would imply that there is a constant coolant feed to the matrix and it is the air that is blended 'over' this coolant with outside air that determines the resultant temperature at the vents.

The V8's use a different method due to the limited space. They use a water-blend system which I would assume alters the amount of coolant entering the matrix (a different one, mind) which determines the resultant amount of hot air outputted.

Of course, I am open to being correct on this.

A good description Simon - and the air system beats the V8 water system everytime!

Fille · 10th October 2008, 19:06

Ok thanks guys. Came to that conclusion myself after playing with the climate control today. Engine off, fan at its lowest setting and then adjusting the temperature up and down, listening if there is something happening in there. And there was sound from both left and right side.

So I guess I just have to believe you when you say my heater matrix is blocked. My local garage said they will not touch it so this means I will ahve to drive a cold car for a couple of weeks until i have time to either swap the matrix or clean out the old one...

Mike · 10th October 2008, 20:00

Quote:

Originally Posted by Fille

So I guess I just have to believe you when you say my heater matrix is blocked.

Well you don't have to.................

10th October 2008, 12:32	#1
Fille Loves to post SOLD - Rover 75 Tourer 2,0 V6 Connoisseur Auto Join Date: Nov 2006 Location: Vaasa Posts: 476 Thanks: 0 Thanked 1 Time in 1 Post	Heater, once more Is there a constant flow of coolant to the heater matrix, ie is the temperature controlled only with air mixing, or is there a valve before the matrix? __________________ 2007 Citroën Grand C4 Picasso - 2005 Citroën C3 - 1990 Citroën XM - 1986 Honda Civic - 1973 Morris Marina 1,3 Coupé - 1973 Morris Marina 1,8 TC Coupé

10th October 2008, 19:06	#4
Fille Loves to post SOLD - Rover 75 Tourer 2,0 V6 Connoisseur Auto Join Date: Nov 2006 Location: Vaasa Posts: 476 Thanks: 0 Thanked 1 Time in 1 Post	Ok thanks guys. Came to that conclusion myself after playing with the climate control today. Engine off, fan at its lowest setting and then adjusting the temperature up and down, listening if there is something happening in there. And there was sound from both left and right side. So I guess I just have to believe you when you say my heater matrix is blocked. My local garage said they will not touch it so this means I will ahve to drive a cold car for a couple of weeks until i have time to either swap the matrix or clean out the old one... __________________ 2007 Citroën Grand C4 Picasso - 2005 Citroën C3 - 1990 Citroën XM - 1986 Honda Civic - 1973 Morris Marina 1,3 Coupé - 1973 Morris Marina 1,8 TC Coupé

10th October 2008, 18:37	#2
Simon Banned - Join Date: Nov 2006 Location: - Posts: 10,318 Thanks: 0 Thanked 4 Times in 3 Posts	I am led to believe that the heater set up in the 75/ZT (excluding the V8 models) are an air-blend type heater which would imply that there is a constant coolant feed to the matrix and it is the air that is blended 'over' this coolant with outside air that determines the resultant temperature at the vents. The V8's use a different method due to the limited space. They use a water-blend system which I would assume alters the amount of coolant entering the matrix (a different one, mind) which determines the resultant amount of hot air outputted. Of course, I am open to being correct on this.