Omega Owners Forum

Please login or register.

Login with username, password and session length
Advanced search  

News:

Please check the Forum Guidelines at the top of the Newbie section

Pages: 1 [2]  All   Go Down

Author Topic: Air con low pressure pipe hot  (Read 615 times)

0 Members and 1 Guest are viewing this topic.

grifter

  • Intermediate Member
  • ***
  • Offline Offline
  • Gender: Male
  • Paisley, Scotland
  • Posts: 483
  • Omega 2.6 owner
    • Omega 2.6
    • View Profile
Re: Air con low pressure pipe hot
« Reply #15 on: 03 July 2018, 18:15:41 »

You can, but you'll need to remove the radiator and condenser in order to remove the fans...

 ;D

Not just the 2 fans behind grill, they have to come out backways towards engine? There is one fan in front of rad, 2 at grill side. I take it air con fans don't come out front ways?
« Last Edit: 03 July 2018, 18:19:07 by grifter »
Logged

Doctor Gollum

  • Omega Lord
  • *******
  • Offline Offline
  • Gender: Male
  • In a colds and darks puddleses
  • Posts: 9481
  • If you can't eat them, join them...
    • Feetses.
    • View Profile
Re: Air con low pressure pipe hot
« Reply #16 on: 03 July 2018, 22:01:17 »

Like I said ;)
Logged
Onanists always think outside the box.

grifter

  • Intermediate Member
  • ***
  • Offline Offline
  • Gender: Male
  • Paisley, Scotland
  • Posts: 483
  • Omega 2.6 owner
    • Omega 2.6
    • View Profile
Re: Air con low pressure pipe hot
« Reply #17 on: 04 July 2018, 07:46:05 »

Had a look through rads with torch and can clearly see right through fins. Not really convinced they are blocked bad enough to cause it not too cool. While my pressure gauge is showing into the green, compressor kicks in and fans running when an on, any other thoughts what it could be. I measured temp of compressor and pipes with infra red temp reader, getting 40 oC on LP pipes, 70  odd on comp and associated pipes. Condenser was about 38 on passenger side, 32 on driver side
Logged

Doctor Gollum

  • Omega Lord
  • *******
  • Offline Offline
  • Gender: Male
  • In a colds and darks puddleses
  • Posts: 9481
  • If you can't eat them, join them...
    • Feetses.
    • View Profile
Re: Air con low pressure pipe hot
« Reply #18 on: 04 July 2018, 11:59:49 »

Get it regassed professionally  ;)
Logged
Onanists always think outside the box.

LC0112G

  • Omega Knight
  • *****
  • Offline Offline
  • 0
  • Posts: 1102
    • View Profile
Re: Air con low pressure pipe hot
« Reply #19 on: 04 July 2018, 16:30:36 »

The coldest part of the A/C system is the expansion/oriface valve. If the system is left without gas in it for any length of time then it can fill with air. Air contains water vapour.

If any water/water vapour isn't properly purged (vacuumed) from the system before being refilled, then the water/water vapour can freeze in the expansion valve and effectively bung the whole system up. This causes the pump to work hard pressurising the coolant into the HP side, but if there is no flow of gas around the system, then all that happens is the gas gets hotter and hotter. The pump has an overpressure cut out, so it may well deactivate itself if this happens, till the ice in the expansion valve melts again. I think the expansion valve is in the cabin behind the dash on an Omega B?

There is a dryer in the system too - it's part of the A/C rad on an Omega - that bottle shaped canister on the front nearside of it. This contains a sort of silica gel, and it's job is to try and capture any moisture in the system. This should not be left exposed to atmosphere for too long before re-gassing because it will capture moisture from the environment. I assume your new rad came fitted with a new dryer? Mine did.

The pipework down the passenger side of the engine on my car (3.0 24V RHD saloon) is ice cold within 10 seconds of starting the engine - too cold to hold onto for very long.

ETA : Just remembered - I've got a digital thermocouple widget in the boot :y. The LP pipework (where the LP valve is) measured +5 DegC. The HP pipework (out of the compressor near the HP valve) measures 55+ degC.  Ambient here is around 20 DegC today.
« Last Edit: 04 July 2018, 16:47:34 by LC0112G »
Logged

Kevin Wood

  • Global Moderator
  • *****
  • Offline Offline
  • Gender: Male
  • Alton, Hampshire
  • Posts: 34195
    • 3.2 MV6 (LPG), Westfield
    • View Profile
Re: Air con low pressure pipe hot
« Reply #20 on: 04 July 2018, 16:54:12 »

In addition, the expansion valve in an Omega is temperature controlled to prevent the evaporator from icing up and to provide variable cooling to suit the ambient temperature. They have been known to fail.

But: Until you know that the system is dry, gas tight and has the correct mass of refrigerant in it, all bets are off. The only way to achieve this is to get it vacuumed out and refilled.
Logged
Tech2 services currently available. See TheBoy's price list: http://theboy.omegaowners.com/

grifter

  • Intermediate Member
  • ***
  • Offline Offline
  • Gender: Male
  • Paisley, Scotland
  • Posts: 483
  • Omega 2.6 owner
    • Omega 2.6
    • View Profile
Re: Air con low pressure pipe hot
« Reply #21 on: 05 July 2018, 07:55:31 »

Found a place in Glasgow who does diagnostics, only 25 bucks for a diagnosis test, most garages round here are saying they can just top gas up.
Logged

Nick W

  • Omega Lord
  • *******
  • Offline Offline
  • Gender: Male
  • Chatham, Kent
  • Posts: 6216
  • Rover Metro 1.8VVC
    • 3.0l Elite estate
    • View Profile
Re: Air con low pressure pipe hot
« Reply #22 on: 05 July 2018, 10:53:14 »

Found a place in Glasgow who does diagnostics, only 25 bucks for a diagnosis test, most garages round here are saying they can just top gas up.


They're not going to diagnose anything until the system is gassed and any obvious leaks sorted
Logged

grifter

  • Intermediate Member
  • ***
  • Offline Offline
  • Gender: Male
  • Paisley, Scotland
  • Posts: 483
  • Omega 2.6 owner
    • Omega 2.6
    • View Profile
Re: Air con low pressure pipe hot
« Reply #23 on: 05 July 2018, 11:20:20 »

Found a place in Glasgow who does diagnostics, only 25 bucks for a diagnosis test, most garages round here are saying they can just top gas up.


They're not going to diagnose anything until the system is gassed and any obvious leaks sorted

That's what I'll be getting them to do. Check for leaks first, vac test.

Also found out what the little button is on centre too of dash, a sun sensor, something to do with climate control as well.
« Last Edit: 05 July 2018, 11:22:16 by grifter »
Logged
Pages: 1 [2]  All   Go Up
 

Page created in 0.14 seconds with 21 queries.