Range rover airconditioning fail

- M
- Marco
  
  Contact options for registered users
posted
18 years ago

Sat, Jul 30, 2005 11:43 AM

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 snipped-for-privacy@wanadoo.nl

- D
- Dave Liquorice
  
  Contact options for registered users
Vote on answer
posted
18 years ago

Sun, Jul 31, 2005 9:17 AM

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...

- M
- Mark
  
  Contact options for registered users
Vote on answer
posted
18 years ago

Sun, Jul 31, 2005 12:17 PM

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' :o)

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

Regards

Mark

- S
- steve Taylor
  
  Contact options for registered users
Vote on answer
posted
18 years ago

Sun, Jul 31, 2005 12:35 PM

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