Thread: Air Con no go

thats is correct.....it has a low pressure cut out switch......

if you bridge it and the compressor kicks in......then you are low on gas.....

on my fender.....one of the pipes was rubbing against a plastic pipe.....which wore through the metal pipe and dumped the gas......

it was repaired and then regassed......and the metal pipe was "adjusted" away from the other pipe.....
check to see if you have any chafing on any of the plumbing......
it sounds like you may have a hole somewhere and it dumped the gas pretty quick....since it was working the day before......

even a stone hitting the condenser is enough to cause this......have a quick look over the system for physical damage before going
to an auto electrician.......

Mine did same thing last week , had a leak , got it regassed and bingo works great.. $90 it was mobile and came to me Powermotive and his name is Warren

Usually if you've lost the gas you have to find the hole and replace whatever it is that's holed.

Had this done a week or so ago after mechanic cracked a pipe join. Cost $150 to put new end on existing hose (hose was only a year old) and regas.

If there is no gas in the system and you know where the hole is you can always take it to pirtek or one of those hose places and get them to make a new one cheap. Remember to replace the O-rings if doing that.

Cheers
Simon

Originally Posted by johncl

Hi all

99 Disco II td5

My aircon was working beautifully until today. Suddenly no go. Nothing but hot air blows out. All related fuses and relays seem OK. The electric fan on condenser switches on, but No voltage to 10 amp fuse under bonnet though.

Any ideas?

I was reading that if you are out of gas the air con system is smart enough to prevent AC from compressing to prevent damage??

Yes the pressure switch will stop the compressor from working - but it will not remove voltage from the 10amp fuse under the bonnet.

The 10amp that energises the clutch relay is fuse No. 6 - and takes it's power direct from battery supply via the 150 amp fusable link.

Do the test on the LP switch - as said either bridge it or use a test meter - but don't be surprised if that isn't the problem

I'll dig out the wiring diagram and post it here.

Cheers

Rang the powermotive guy up and he coming out tomorrow to take a look at it

Wiring diagram attached, as you will see power to the 10amp fuse is direct, the pressure switch will not remove the voltage from there.

Just asking stupid questions here, but

Did you check the live side of the fuse ?

...........because unless a wire has dropped off or the 150 amp or the 100 amp link is blown there is nothing else to stop voltage getting to that fuse

Fixed

One of the two wires from the plug into the AC compressor had broken.

I second look in the clear light of day helped me find it. Whilst it was broken it had not moved away, so it was not really obvious that that was the problem

Easy, just the way I like it

When my aircon died last year I did some digging and there was no power to the fuse UNLESS i bridged the contacts on the pressure cut out.

I just collected mine this morning from the local aircon place. He fixed it about 6 weeks ago (new seals in one of the joint, new R134 refill) and it worked fine on the day. The next hot day (3 weeks ago) I turned it on and nothing (out of gas!). Took it back and one of the hose joints had failed on the low pressure side of the compressor. He fixed it and charged me for ANOTHER regas and put a dent in the door to boot. So far it's cost $330 to fix and I'll be without the car for 2 weeks next week while the door is fixed.

GRRR! Aircon sucks poo!