Discovery 2 - Air Conditioner Drains

**Franz** · 12th February 2009, 01:40 PM

There has been some discussion on the impact of the air conditioner drains on front drive shaft failures - there are some that believe this may be a cause of premature DC failure.

I have had some past trouble with air conditioner drains blocking up and flooding the footwells with water over time. First step was to remove the "nipples" that prevent dirt ingress - this solved the clogging problem. I would recommend this step to all Disco owners whether used off road or not.

As a next step, I decide to divert the water away from the DS drain as it dripped on the front drive shaft. I bought some vacuum hose (I think 16mm from Autobarn) and zip tied it to the chassis rail.

Idid not do the passenger side until recently because I noticed that the water drips onto a electrical connector and thought "well, that can't be any good". Bought another piece of vaccum hose and zip tied it to the exhaust hanger - problem solved.

I'm not 100% sure of the size of the vacuum hose so it is advisable to do what I did and use the "nipple" as a sample to find the corect diameter hose.

Cheers,

Franz
2004 Discovery Td5 Classic Auto with mods

**p38arover** · 12th February 2009, 01:52 PM

I believe that on a D2, the condensate drips onto the XYZ switch and ruins it. These are not cheap.

**Franz** · 12th February 2009, 01:58 PM

Originally Posted by p38arover

I believe that on a D2, the condensate drips onto the XYZ switch and ruins it. These are not cheap.

What does the XYZ switch do?

**Scouse** · 12th February 2009, 01:59 PM

Also known as the inhibitor switch.

**trev** · 12th February 2009, 08:15 PM

In hot, humid weather a lot of water comes out of these.
I fixed the problem with a couple of lengths of 10mm OD clear beverage tubing.This size fits up through the nipples and works fine.
Just tie off with a couple of cable ties to hold in place.
Doesn`t matter if the size is not quite right,the natural tendancy is for the water to track down the tube either inside or outside.
Either way it stops it dripping on the DC joints and the inhibitor switch.

Trev.

**Ricey** · 12th February 2009, 10:45 PM

I did mine after changing the Auto(?) inhibitor switch. I did it from the top while having the centre console out and just used garden hose & zip ties. Seems to drip away freely without causing unseen damage.

**wardy1** · 13th February 2009, 05:26 PM

grrrrr I ned to replace my inhibitor switch. anyone have a good supplier?Been quoted around $400 for a bloody switch.
Also, are there any things I need to be carful of installing new one?

**Pierre** · 23rd February 2009, 12:55 PM

Yep. Make sure the trans is COLD!!!!!

Pete

**ozscott** · 24th February 2009, 08:53 AM

What does the inhibitor switch do...might be academic for me because mines a manual

Cheers

**2 rocks** · 24th February 2009, 11:13 PM

Also known as a "gear position switch" - tells various bits and bobs what gear has been selected on the automatic transmission.
With age and wear, this item is also used to create serious frustration in the user as it causes the "M&S" lights to flash on the dashboard, it causes the selection of 3rd gear as a default "limp home" option (try that on a steep driveway!), gear indicators disappear from the dash LCD and ultimately causes a failure to start due to the confusion of what gear is selected and as we all know an auto will only start in N or P...
Have I replaced mine...yep you guessed it! Oooh yeah! Lol!
Mike

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