Advertise on DISCO3.CO.UK
Forum · Gallery · Wiki · Shop · Sponsors
DISCO3.CO.UK > Maintenance & Mods (D3)

Air con diagnostics
Post Reply  Down to end
Page 1 of 1
AdamB
 


Member Since: 18 Jan 2023
Location: Thurrock
Posts: 79

England 2010 Discovery 4 3.0 TDV6 XS Auto Stornoway GreyDiscovery 4
Air con diagnostics

Looking at the below is there anything obvious that would say my AC isn't working? The pressure looks like it might be fairly normal, the compressor current changes when you switch in and out of eco, the optimist in me is hoping there's a simple fix!

 

Last edited by AdamB on 21st Jun 2023 9:00 pm. Edited 1 time in total 
Post #233968917th Jun 2023 9:58 am
View user's profile Send private message View poster's gallery Reply with quote
Nc1989
 


Member Since: 28 Apr 2015
Location: Doncaster
Posts: 202

United Kingdom 2005 Discovery 3 TDV6 S Manual Java BlackDiscovery 3

Check the compressor hasn’t seized and spat the front of the pulley off. Not the nicest of jobs to change it if it is knackered!
  
Post #233969417th Jun 2023 11:39 am
View user's profile Send private message View poster's gallery Reply with quote
Jimbob42
 


Member Since: 23 Mar 2022
Location: Leicester
Posts: 112

2005 Discovery 3 TDV6 SE Auto Tonga GreenDiscovery 3

Pressure too low? If this is low side I’d expect 2500?
  
Post #233971617th Jun 2023 5:34 pm
View user's profile Send private message View poster's gallery Reply with quote
Nc1989
 


Member Since: 28 Apr 2015
Location: Doncaster
Posts: 202

United Kingdom 2005 Discovery 3 TDV6 S Manual Java BlackDiscovery 3

Pressure looks in the ballpark, if you’d got 2500kpa I’d be concerned Shocked
  
Post #233973117th Jun 2023 8:45 pm
View user's profile Send private message View poster's gallery Reply with quote
Jimbob42
 


Member Since: 23 Mar 2022
Location: Leicester
Posts: 112

2005 Discovery 3 TDV6 SE Auto Tonga GreenDiscovery 3

Meant 250 on low. High roughly 1200.
  
Post #233973217th Jun 2023 9:14 pm
View user's profile Send private message View poster's gallery Reply with quote
AdamB
 


Member Since: 18 Jan 2023
Location: Thurrock
Posts: 79

England 2010 Discovery 4 3.0 TDV6 XS Auto Stornoway GreyDiscovery 4

I'd only just turned it off at that point so there's a good chance it would have dropped further, will try again tomorrow.

How easy is it to diagnose the pulley?
  
Post #233973317th Jun 2023 9:46 pm
View user's profile Send private message View poster's gallery Reply with quote
AdamB
 


Member Since: 18 Jan 2023
Location: Thurrock
Posts: 79

England 2010 Discovery 4 3.0 TDV6 XS Auto Stornoway GreyDiscovery 4

Further to this I put a thermometer in the vent this morning, the air gets about a degree warmer when the AC is switched on. Would this indicate anything interesting? Tempted to grab one of those Halfords top up kits to see what happens.
  
Post #234000421st Jun 2023 8:12 am
View user's profile Send private message View poster's gallery Reply with quote
AdamB
 


Member Since: 18 Jan 2023
Location: Thurrock
Posts: 79

England 2010 Discovery 4 3.0 TDV6 XS Auto Stornoway GreyDiscovery 4

Just for info in case anyone finds this later, I bought the Halfords kit, regassed it and all currently appears to be good.

I came to the conclusion it needed a regas as the values reported by gap iid when off and on seemed fairly consistent with what I'd researched. Using an instant read thermometer (not the meat one from the kitchen if the wife asks, honest) I could repeatedly replicate the air temperature increasing by around one degree when the ac was on, dropping back to where it was before when ECON was pressed. I made the assumption that it was doing something so presumably it just needed a top up.

I bought the analogue guage version of the trigger and a bottle of the gas.

Before starting it read 100psi on the low side, as soon as I started the car it dropped to around 10psi. I've now charged it to around 30psi.

Hopeful of a nice cool ride to work tomorrow!
  
Post #234008221st Jun 2023 9:00 pm
View user's profile Send private message View poster's gallery Post Reply
Display posts from the last:  
Post Reply Back to top
Page 1 of 1
Jump to:  
Previous Topic | Next Topic >


Posting Rules
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



DISCO3.CO.UK Copyright © 2004-2024 Futuranet Ltd & Martin Lewis
DISCO3.CO.UK RSS Feed - All Forums

DISCO3.CO.UK is independent and not affiliated to Land Rover.
Switch to Mobile Site