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Alfa 159 air con not working :(

Hope someone can help me diagnose my air con problem. Bought an Alfa 159 1.9JTDm (2006) recently. Only just tested the aircon as there appears to be a heat wave.

The air con doesn't seem to be getting cold. Heater/fan blows hot air fine. Pressing the button doesn't seem to make it any colder than havin it on the lowest temp setting. The button lights up like it should. There's a slight change to the idle for a moment when pressing the button. With the bonnet up u can hear a quiet click when you press the button. In the car there's a slight change to the sound of the fans when pressing the button (sort of like a cd when it starts spinning). But the air doesn't get any colder.

Anyone know how I can diagnose the fault? (bearin in mind i only have very basic mechanical/auto electrical knowledge). Maybe it just needs a service?

Any help would be appreciated.

Thanks,

Matt
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Contrary to popular belief, auto air con does need servicing. Not always a recharge of the system, but at least a pressure test.

Sound like yours has lost its charge. A simple test from a decent air con specialist will tell you if thats the case. They have preset pressure readings to see if the system has lost charge or not.

Also, when the system is filled/refilled, a lubricant is added to the charge gas. This helps to lubricate the joints in the system, the seals.
If air con is not used enough, these seals can/do dry out creating a leak in the system. It is best practice to use the air con at least once a week to keep these seals lubricated.

Maybe yours has just dried out and needs a refresh? Anywhere between 35 and 65 for a recharge depending on where you go.

DO you get a "dry" almost metallic rattle when the air con is switched on and the fan turned up? This can be a sign of an empty system.

Moved over to the dark side

And loving it
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Thanks for the quick response. Do they do a recharge as part of the service? Not sure how often the air con has been used in the past but once I get it sorted I'll try to use it once a week to keep it in good operating condition.

The sound difference when u press the air con button isnt very noticeable. It's a quiet sound. Not really a rattle. More like a echoed hiss, or like I said before a cd starting to spin. Only lasts about 1-2 seconds though. Pressing the button affects the idle as though the air con shoul start to kick in so would this show that it's nothing to do with the electrics?
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Hiss. Thats a better way of describing the "dry" sound!

Normal service for the car almost never includes an air con service. This is generally a separate request/price.

I have used the same indie air con specialist in the Midlands for the past 6 years. A good, honest fella who only does what is required.
Have a look online and see if there is a local one to you. Or take it to Quick Fit.........

The change in revs usually means the compressor is kicking in. There is an electro magnetic clutch on the aux belt and compressor. When you press the button it engages the clutch on the compressor, adding load to the engine hence the brief change in revs.
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The other option is to replace/check the pollen filter.
If these get clogged up it does dramatically affect the air temp.
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If it was a clogged pollen filter wouldnt that affect all airflow or is it only for the air con? As mentioned before the fans seem to work fine. Blow plenty of air out and also heat up well. It's just the cold factor. Also if the pollen filter was clogged wouldnt it have some kind of error coming up on the display?

If its an easy job I might have a look at the pollen filter. Or maybe get it booked in somewhere for air con service. I'm trying to think of the most cost effective way to get this sorted. Don't want to go to a garage then they spend loads of time trying to diagnose a fault, replacing parts, and doing a service etc..could easily run into a few hundred quid.
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Pollen filter looks like an air filter, paper/material. I think it is held behind the glove box. Not 100% on that one though!
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An air con service is your best option.

I know my air con specialist well enough, he replaced a duff condensor pump on a Saab I had. 2 years ago he and I had great fun fixing a leak on the previous 159. A worn rubber ring had caused a leak, so every time he recharged it, it lost its pressure.

Ended up me taking the front bumper off to access a 50p rubber ring!
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Thanks for your advice. I'll have a search for an aircon specialist or similar to do a service when I get some spare cash.
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Kwik fit do a fixed price pressure test and recharge, if it doesnt cure your problem, or find a leam, you get your money back.

I dont usually reccomend Kwik Fit, but its an automated process with 2 hoses and a bit of input.

As good as any garage, but not as good as a 'proper' Automotive refrigeration technician.

If you need any parts replaced, an Alfa Specialist is preferred as getting access to things requires some previous experience.
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Any idea how much the fixed price kwik fit test/recharge is? I know I can get a service done for about 50quid but not sure if they would test and recharge as part of the service?
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Try this:

Air Conditioning
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Step 1: check to see if there is any leakage in the system. Fluorescent dye can help you with this work. In fact, if there is a heavy leakage, there will be no pressure. Just use a gauge to check the PSI level in the low-side valve.

Step 2: check if the compressor is turning; start your 2006 Alfa Romeo 159 1.9 JTDm Lusso and turn on the AC; find the air conditioner compressor to see if it is on. If it is on and the blower is on but the pulley is not turning, you can have the idea that the clutch of compressor is not engaging. The main reasons for causing such problem are bad fuse, wiring problem, broken AC switch or low on refrigerant.

Step 3: there are several other problems that an auto AC many encounters are bad switches, fan belt problem or seal problem.

Step 4: there is another situation that there is cooling in car but not cool enough. You can guess that the pressure may be low and you just need to add refrigerant.

Hope i offered some help
bradley
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Quote:
Originally Posted by Bradley75 View Post
Step 1: check to see if there is any leakage in the system. Fluorescent dye can help you with this work. In fact, if there is a heavy leakage, there will be no pressure. Just use a gauge to check the PSI level in the low-side valve.

Step 2: check if the compressor is turning; start your 2006 Alfa Romeo 159 1.9 JTDm Lusso and turn on the AC; find the air conditioner compressor to see if it is on. If it is on and the blower is on but the pulley is not turning, you can have the idea that the clutch of compressor is not engaging. The main reasons for causing such problem are bad fuse, wiring problem, broken AC switch or low on refrigerant.

Step 3: there are several other problems that an auto AC many encounters are bad switches, fan belt problem or seal problem.

Step 4: there is another situation that there is cooling in car but not cool enough. You can guess that the pressure may be low and you just need to add refrigerant.

Hope i offered some help
bradley
I hope in the near 3 years since this post he has got it sorted but hopefully this will provide some help should someone else have the same issue later on
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Originally Posted by mattgez View Post
Any idea how much the fixed price kwik fit test/recharge is? I know I can get a service done for about 50quid but not sure if they would test and recharge as part of the service?
Hi i had my alfa 159 ti pressure tested re gassed oil topped up and dye put into the system at halfords for 49.99 last weekend 10/09/2016 unfortunately the air con is back to blowing no chilled air
they said if i bring it back they will find the fault without any extra charge ie there will be a charge for repair for pipes pump etc should i decide to let them do the work ,but the way i look at it is at least ill know what the problem is
hope this helps anyone looking to find a fault
ill post the cost when i find the problem from Halfords
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