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Discussion Starter · #1 ·
After purchasing my first X it turned out that A/C needed re-charging. Did that and all was well. Two days ago I noticed something really unusual happening.

When I turn the A/C on it blows cold air from one vent only, the driver side left dash vent, right driver side vent blows a little bit warmer air. Passenger dash vents blow warm air, the warmer it gets the warmer the engine is.

When known is turned to windshield de-mist driver side blows cold air and passenger warm. The longer I drive the air gets less cold.

The compressor starts, clutch works fine, cold line gets cold. Problem is the compressor seems to be switching on and off very often.

Anybody has any ideas what the hell is wrong??

It was fine, blowing nice cold from all vents after I re-charged it. It was done by Kwik-Fit and machine pulled and kept vacuum and registered no leaks in the system.

It is really annoying with warm weather now.

Any comments would be helpful.

The only thing I did in the meantime was to change the cabin filter behind the glove box. Had a pokey in there last night and all looked fine, but I am not an A/C specialist...
 

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After purchasing my first X it turned out that A/C needed re-charging. Did that and all was well. Two days ago I noticed something really unusual happening.

When I turn the A/C on it blows cold air from one vent only, the driver side left dash vent, right driver side vent blows a little bit warmer air. Passenger dash vents blow warm air, the warmer it gets the warmer the engine is.

When known is turned to windshield de-mist driver side blows cold air and passenger warm. The longer I drive the air gets less cold.

The compressor starts, clutch works fine, cold line gets cold. Problem is the compressor seems to be switching on and off very often.

Anybody has any ideas what the hell is wrong??

It was fine, blowing nice cold from all vents after I re-charged it. It was done by Kwik-Fit and machine pulled and kept vacuum and registered no leaks in the system.

It is really annoying with warm weather now.

Any comments would be helpful.

The only thing I did in the meantime was to change the cabin filter behind the glove box. Had a pokey in there last night and all looked fine, but I am not an A/C specialist...
Can you actually hear/see the ac clutch engaging and dis-engaging the ac pump?

Stu
 

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Discussion Starter · #3 ·
Yes, it works well, engages and disengages with fans coming on and off at the same time. It produces cold as well. What it does out of usual is switching on and off say every 30 secs.
 

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Discussion Starter · #5 ·
So if there was a leak and that was the cause of the compressor switching on and off why on Earth the cold air is coming properly only from left driver vent, half decent from the right driver vent and hot from the passenger ones??? I looked at the maintenance man ant there is nothing to split airflow between left and right hand side. Could it be something blocking the air, a leaf or other crap?
 

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Discussion Starter · #7 ·
Single zone and internal recirculation button makes no difference.

Anybody any suggestions?
 

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If it needed recharging in the first place...............it's got a leak.
If you fill it up and it's still got a leak.....it wasn't fixed properly.
It'll run out again.
Which it probably has by now.
 

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Discussion Starter · #9 ·
I was standing by the A/C machine and for some 20mins it held vacuum and reported no leaks. They filled it with dyed refrigerant so I will get a black light and check for leaks. It must be a really slow one then:(. Does it explain cold air coming from one vent only? All ducts have common plenum from I can read from the maintenance manual...
 

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The X doesn't have dual zones so it's odd to hear that one vent is blowing hot and the other cold - if it's like my old Celica the ducts in the air vents are possibly controlled by electric servo's so it's possible one or more has failed.

AC systems also normally have a cut off system if the gas has leaked out to stop the compressor being destroyed so I'd expect it to refuse to engage and throw a fault code rather if it detects that the gas is low. The only reason I can think for it cutting in and out is that one of the sensors indicates that it's reached the target temperature (which it possibly has, however if there is no air blowing over the evaporator as the duct for it isn't opening then the AC system won't have to work hard to keep it cold and no cold air will get into the cabin).
 

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Discussion Starter · #11 ·
Thanks Sephiro, sensors contributing to this is certainly something to look at but entirely sure how.... there no fault codes on the scanner I am using and it reads A/C systems to some extent - A/C PIDs are available. What I cannot get around in my head is why only one went blows cold, the other semi-cold and passenger ones plain warm air from the engine. I will have a good look tonight at all of it (had no time in the week apart from taking no the glove box out and looking inside, the actuator for flow direction was working fine) starting with the black lift investigation. Before the recharge all vents were blowing the same temp air, right after recharge it was perfect, all vents blowing ice cold air. Then sth happened, no clue what and this problem occurred. Having thought about it the only thing I did about that time was to replace the cabin air filter... the first I noticed sth was wrong but never dwelled on it at the time is when I was de-misting the windshield, only driver side was being demised and left wasn't which looks like back then it was a problem already. This gets me thinking if during the filter swap something might have happened, no clue what, which caused that infuriating fault!
Hence my cry for help here:).
 

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Discussion Starter · #12 ·
A bit of an update.

The A/C stopped working altogether i.e. no cold air at all from anywhere.
I bought a UV light and had a nosey on Saturday night.

I took off the plastic cover along he top front of the engine bay where latch is to get some access to condenser etc. Couldn't get the light everywhere (did not remove the plastic undertrays to get the look from underneath.

What I did find is lots of UV dye around the low pressure service valve. The pipe around the valve is covered with it, drips in piping etc down below and spray marks on the side of plastic engine cover.

Question is, is it the valve being leaky and letting all the refrigerant out slowly or is it just mess from the fill up procedure? Fill was done roughly two months ago. After it was re charged it worked perfectly, then only partially, then stopped altogether.

What do you think?
 

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As for the window demist, i cant remember which side, but it was 1 of the first things I noticed after getting my 10, the screen seems to demist 1 side much quicker than the other side, cant remember which

I'd take the car back to the air con recharge place, re-check the pressure in the system

Stu
 

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Discussion Starter · #14 ·
Cheers Stu, will be calling them lunch time to see if I could pop around today in the afternoon.

Anybody knows if that dye around the low pressure side suction hose valve is due to messy re-charge or leak? Preferably people who have done it before ;)
Thanks!
 

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Cheers Stu, will be calling them lunch time to see if I could pop around today in the afternoon.

Anybody knows if that dye around the low pressure side suction hose valve is due to messy re-charge or leak? Preferably people who have done it before ;)
Thanks!
Thread revival!

Got myself a 2014 EVO X a couples months ago, and I have the exact same problems...some not so cold air coming from the driver side vent, but hot air coming from the passenger side vents

Not too familiar with the EVO, but this makes no sense since the air is coming from a common duct!?

Did you resolve your A/C problems...would be great to have a solution for this since it is freakin hot right now :)

Thanks
 

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Thread revival!

Got myself a 2014 EVO X a couples months ago, and I have the exact same problems...some not so cold air coming from the driver side vent, but hot air coming from the passenger side vents

Not too familiar with the EVO, but this makes no sense since the air is coming from a common duct!?

Did you resolve your A/C problems...would be great to have a solution for this since it is freakin hot right now :)

Thanks
did anyone solve this, 2 guys same problem, now I have the same issue, hot from 2 vents, warm from 1 and only cold from one. I took apart the glovebox area to get to the Actuator for the flap, it works fine, when I flip it, 100% heat, the other position, as above.
 

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My evo x works fine from all vents as far as I am aware and appears to be cold from each vent. However I too have noticed, especially at idle that the rather noisy compressor switching on and off is rather unusual and embarrassing at times!
Not sure why it does this yet but glad to hear I'm not the only one!
As for the suspected leaky valve, clean it off and fill the valve with a spray of wd40, if it bubbles constantly then you have a leak.
The dye you currently see is likely there as the hose still had pressure in it when being removed by the kwik fit chap too early and has sprayed remaining dye due the removed pressure.

Cheers Aj
 
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