Thread: Heater A/C Issue

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!

Originally Posted by 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.

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

Originally Posted by ladas

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"

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

Originally Posted by Tombie2

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