Air con re-gas

[television]

would a re gas also apply if the system seems to work fine, but takes maybe a minute or so to start blowing cold? if i have my blower on 5 like i did today, i can get condensation forming on the outside of the windscreed above the demist vents. or i have been every day this week so far!

I do not know the answer to that, maybe SAM knows

 

[Cole@MBS]

would a re gas also apply if the system seems to work fine, but takes maybe a minute or so to start blowing cold? if i have my blower on 5 like i did today, i can get condensation forming on the outside of the windscreed above the demist vents. or i have been every day this week so far!

You have to give it a min to charge Pete!! thats well within its limits, in fact pretty quick, i drove about 5 miles tonight before mine really kicked in, might need a regas, better pop down to kwick fit!!!!

 

[turbopete]

as i said it just seems to take a while but its not as cold as dads w203 and his seems more instant. just wondered if it needs attention or if its a variation of the system between the 2 cars?

 

[turbopete]

cheers for that. its a relief that its nothing to worry about! think i may need a new pollen filter as the fan seems a bit short of blow! job for next service though i think! ive never put one in it yet, but ive only had it a year!

 

[area51]

Had the air con re-gas done this morning at Mercedes Orpington. No evidence of any leaks/problems [ breathes sigh of relief ].Faultless customer service as usual, friendly,helpful, but..

While the air con is without doubt much cooler than before, I would hesitate to describe it as genuinely cold.

Is the air conditioning on the W168 a bit on the weak side? Should I change the pollen filter? [ New filter was fitted 15 months ago].

Chris

 

[Cole@MBS]

Take it out and try it without, if it makes a real difference then yes, if no then put it back in!!

 

[mattkh]

Is the air conditioning on the W168 a bit on the weak side? Chris

Hi
Look at the paperwork and tell me how much gas was sucked out and how much was put in.

 

[cleverdicky]

Guys, experts and Exulted Merc persons.
Please understand that while varying pressures is a good 'indicator' of what a frige (AC) system is doing, IT WILL NOT, EVER tell you how much gas is or isnt in your system.

Its clear many are interested so here's a bit of a guide. As a 'rule of thumb Condensing pressures (that's compressed gas on the high discharge / compressed side of a system) are about and should be 20 ish degres 'C' ABOVE ambient temperatures.
If really interested look up comparator and psycrometric.

To better explain, a refrigerant depending which one will have its own lets say variables. Evaporating and condensing pressures are the two relevant here. Any vapor compression cycle has two sides. A low or suction side (the compressor sucks) and a high side the compressor well compresses the gas ( Its still a gas until it gives up heat in the condenser, and still stays at same pressure 20 ish degrees above ambient. (This is the practical ideal temperature differential so it loses the heat it needs to to become a liquid again).
The pressure is dependent on the performance of the compressor, and the rest of the system, the gas and the ambient temperature.
Its the pressure differential at the expansion valve (a valve that varies the size of the hole) yes just like that! That when the high pressure liquid squirts through a tiny hole it turns back into a gas. In doing so it draws in the heat from around it (the evaporator, making cold colder) This is the evaporating pressure and for nearly all AC will be at a pressure at an equivalent temperature just above 0'c. The exact pressure depends on the gas but looking at a comparator it will tell you.
So if you have a high-er discharge pressure than normal could be (blocked condenser, poor fan, blocked dryer etc.) and vice versa if you see what I mean.
Check the obvious first.
Hope this helps explain?

 

[area51]

Hi
Look at the paperwork and tell me how much gas was sucked out and how much was put in.

I wasn't given any record of gas quantities, should I ask for them ?

Chris

 

[LYNALL]

Agreed, but we have had cars in running over 20 bar of pressure and over filled our aircon machine oil pot after sucking out the oil,

All car were filled up by........................................you got it, a kwick fit fitter!!!

Wow thats a lot of oil, i think pn our machine the pot only holds 250ml and rare to get more than 50 out of most trucks, similiar amount of gas to cars 750/1000gr.




Lynall

 

[Dosco]

You have to give it a min to charge Pete!! thats well within its limits, in fact pretty quick, i drove about 5 miles tonight before mine really kicked in, might need a regas, better pop down to kwick fit!!!!

... at least you know a man who can and a lot fitter and quicker! He might just serenade you on the jo'ana whilst 'gassin your motor's aircon' as my neighbour was told last week after having QF do the job

 

[Dangem]

w203 2003 c270. The ignition module failed recently, replaced at main stealers. Now the A/C will not work. All controls work, switch to AUTO fan speeds up etc. No temperature difference on discharge or suction pipes from compressor ( ex refrigeration engineer ) standing pressure high. Was working fine before ignition fault. Anything I can check or is it a main stealer cock up !

 

[yeoman]

Just my two penn'orth regarding K*** F**. I have used them in the past with varying results. Took the ML in to see if they still did regas work as the AC was blowing warm. The local one was in uproar as they seemed to be in the middle of a complete building revamp. They didn't know where their machine was but thought they would be able to find it if I could leave the car with them for the day. Then told me it would be the thick end of £50. Made my excuses and left. Won't be going back any time soon. Took it into nearest MB outlet who did the job including the fluorescent dye for £69. Result! Especially as they valeted the interior and washed the car. There was also a much appreciated tin of Mercedes travel sweets on the passenger seat. Nice job. Got a full report on the AC - no faults found. I'm tempted to ask if they will do my Astravan next.

 

[Mightynimrod]

I purchased my 2001 S203 and the ac was blowing warm.
Took it to formula 1 auto centre, no refrigerant in the system at all.
Re gassed and checked it ran at 7 degrees with no leaks reported, however when it came back from the body shop it ran warm again.
I took it back to formula 1 who topped it back up which was lovely for about two days but now is warm again.
I hate any aspect of my car not working properly so have it booked in at an ac specialist tomorrow, he already advised that it could be the condenser and reckoned about £220-£250 to check, replace and Regas.

Firstly, does this sound a common occurrence, does the price sound right and is it an easy job to do myself and then get refilled?

Any help appreciated