Range rover airconditioning fail

all,

in my 97 RR 4.6 HSE the airconditioning works great except when it it really
warm and the car just ran for about 15-20 minutes. When shut down, let rest
for 5 minutes and restart the AC fails to work and does so untill the next
day. Then it works fine again and the ritual repeats itself. During colder
weather the AC works normally. There are 3 relays under the hood that seem
to contol the AC. One is a main relay and the other 2 are left and right
compartment realys or so it seems. I tried cleaning them, no difference. I
did notice the relays getting really warm (engine heat/surrounding heat).
Could that be the problem? Could a low AC cooling liquid be the problem? is
there something else i can check? all fuses are fine. I also removed and
cleaned the AC fuse(s).

Please let me know if you have other ideas

Marco
[email protected]

On Sat, 30 Jul 2005 13:43:53 +0200, Marco wrote:

> Could a low AC cooling liquid be the problem?

My bet would be for low gas if all the control system appears to work.
The AC on my DII wasn't very good, only cool rather than cold air
blown out when set to maximum cooling and on occasion no cooling at
all, also a strange gurgly/hissy/bubbly noise when switching off from
under the dash.

Had the system regassed(*) and all is now fine, cold air, always works
and no weird noise...

--
Cheers [email protected]
Dave. pam is missing e-mail

X-No-Archive: Yes
"Dave Liquorice" <[email protected]> wrote in message
> Had the system regassed(*) and all is now fine, cold air, always works
> and no weird noise...

In the states they sell tins of refrigerant, a little adaptor, then you
simply recharge the system yourself. Saves a bunch on 'air conditioning
specialists' )

All you have to watch for is pre-/post-cfc systems, the later systems need
oil as well as refrigerant.

Regards

Mark

Mark wrote:
> In the states they sell tins of refrigerant, a little adaptor, then you
> simply recharge the system yourself. Saves a bunch on 'air conditioning
> specialists' )
>
> All you have to watch for is pre-/post-cfc systems, the later systems need
> oil as well as refrigerant.

You can buy the bits over here too. If you are in the Manchester area,
and you want HFC134, then I even have the kit at work !

Post-cfc systems need DIFFERENT lubricant than pre, but AFAIK, you don't
HAVE to reload the lube if you re-gas an HFC filled system, unless you
have definitely lost lube, and judging how much to add would be mighty
nigh impossible.

Usually, a system is filled from empty by adding an accurately known
weight of lubricant, and it is illegal to empty a system to atmosphere -
you have to recover the gas with a vacuum pump/compressor into a waste
tank. You could add gas and monitor the performance yourself, but more
is not necessarily better, and if you overfill, you can destroy the
compressor very easily.

Steve