Heater A/C Issue

[Lightweight]

My heater - A/C is playing up, is just started only pumping hot air, and only out of the front window demister, or the feet air vent. It also beeps a few times when the ignition is turned on, which is a new event. I have tried every setting and nothing seems to fix the problem.

Anyone seen or experienced this problem?

[waynep]

Model and year ?

[LandyAndy]

Sounds like D2.
There is a diagnosis you can do via the controls.
I have tried a search to find the post but cant unfortunately.
This may jog others memory and they can tell how its done.
Goodluck
Andrew

[justinc]

Step 1: Go to the tool bar at the top of this page.

Step2: Click on 'Shop'

Step3: Purchase RAVE discs from Dave (Incisor)

Step4: As Landyandy says, there is a code extraction method you can
perform using the controls, but I can't remember how to do it now:(

These RAVE discs are an invaluable asset when owning a D2.
(It's possible the sensor in the dash next to the ignition key area (A little grille thingy) is faulty and/ or blocked. This is the internal air temp sensor for the climate control.)

JC

[simonr23]

i've just had a squiz through RAVE. if it is for a D2 let me know and i'll pm you with the process for fault finding. its as the guys have already said, a button pushing sequence and then a matter of reading the codes(if any) that come up. it's a bit long winded for me to type out here.

[LandyAndy]

It has been explained in a thread,with the method and codes.I did several searches but gave up.
Somebody who has used it may know what the title was.
Andrew

[Lightweight]

Hi All,

it is a 2002 D2, TD5.

[trev]

Trev.

[Lightweight]

The plot thickens a little on this one, it has warmed up a little here, and upon driving to work in temps over 5 degrees, i noticed this morning i didn't have the heater on... but there was still hot air pumping out of the foot wells, and out of the demister for the front windscreen? It seems no matter what the setting is, and even if the A/C is off, it is till pumping hot air out.

[Tombie]

The plot thickens a little on this one, it has warmed up a little here, and upon driving to work in temps over 5 degrees, i noticed this morning i didn't have the heater on... but there was still hot air pumping out of the foot wells, and out of the demister for the front windscreen? It seems no matter what the setting is, and even if the A/C is off, it is till pumping hot air out.

Normal

If you dont want hot air, adjust your temp settings...

Off isnt OFF :cool:

[Lightweight]

I would accept that... but the heater is OFF, and it still pumps hot air.. I know it is supposed to be smart and have climate control, but OFF is OFF in my books, there should be no air pumping at all, never mind 45 degree hot air, even when the setting is 16 or "Lo" for that matter

[Tombie]

Accept it or not its fact...

Off means the controls that run the HEVAC are off...

This means the air controls and the valves that shut off the hot water to the heater matrix are not being kept closed...

Off is Not Off....

BTW, the TD5 doesnt use more or less fuel with the system always on!

[ladas]

The plot thickens a little on this one, it has warmed up a little here, and upon driving to work in temps over 5 degrees, i noticed this morning i didn't have the heater on... but there was still hot air pumping out of the foot wells, and out of the demister for the front windscreen? It seems no matter what the setting is, and even if the A/C is off, it is till pumping hot air out.

Then it's likely that the 'flaps' that direct the cool/heat are stuck/non functioning/buggered.

They are controlled by little servo motors (later D2, or cables with early or D1's) - all directed by the heater/ac controller - you should be able to - with the ignition on - without starting - switch from one mode to another - and hear the flaps move -

If they don't then you are sure to get heat when not required

They could be just stuck, or the signals that tell them to move are not doing the job.

So in essence it could either be an electronics/electrical problem - or purely mechanical that a little grease would solve

[Tombie]

Then it's likely that the 'flaps' that direct the cool/heat are stuck/non functioning/buggered.

They are controlled by little servo motors (later D2, or cables with early or D1's) - all directed by the heater/ac controller - you should be able to - with the ignition on - without starting - switch from one mode to another - and hear the flaps move -

If they don't then you are sure to get heat when not required

They could be just stuck, or the signals that tell them to move are not doing the job.

So in essence it could either be an electronics/electrical problem - or purely mechanical that a little grease would solve

Mate, try it yourself..

Drive along and turn off your system...

You'll get hot air!

Its been discussed in length on D2AU etc...

He's got nothing broken if it works when the system is "ON"

[ladas]

My D1, and certainly the D2 I have now - do not have valves on the hot water flow to the heater matrix - I was actually thinking about fitting a manual (well a cable operated one - don't want to work too hard) one to the D2, as despite the flaps working fine I am sure the AC works overtime due to hot air 'leaks' round the flaps

[ladas]

Mate, try it yourself..

Drive along and turn off your system...

You'll get hot air!

Its been discussed in length on D2AU etc...

He's got nothing broken if it works when the system is "ON"

Oooopps missed the point that he had the system OFF - fair point

[Zute]

Stopping the flow through the heater matrix could be fatal to the engines cooling flow. Be very, very careful.:(