Sharpy1980 wrote:

I checked my rrs with the iid today and mine shows the pressure as 7.2 bar with the a/c running, you need to check what measurement your iid is set to as it can be changed I.e bar ,psi or mpa I think. If it was over charged before then it is likely that it wasn't working previously so someone may have tried to add gas from one of those diy cans from Halfords etc.
Imo there are a lot of fast fit chains and smaller garages that own A/C machines and are quite capable of draining and refilling the system but have no idea of how the system works so when there is a fault other than gas they are unable to fix it (I mean no offence to your friend or anybody else with a machine) but it maybe worth finding someone who specialises in Air conditioning as these people just by looking at the gauges can quite often be able to diagnose the fault or at least rule out most of the possibilities which will probably end up costing a lot less to fix

So could you let me know how to change the readings on the idd as mine reads in kpa or do i need to connect gap

From memory I'm pretty sure that when you go into the live values there are 3 options and you want "units" and then you choose which one you want  Clickadeeclick

Hi spent all day monday on this evaporated gas what gas i might say absolutely nothing in there so started with the uv light (no nitrogen) spent about 2 and a half hours looking everywhere no green dye anywhere to be seen but found quite a lot around the Schraeder valves so after a bit of discussion and searching we decided to refill so first we vacuumed for 55 mins and refilled and so far the system has stayed up and running so thats 2 days which is a lot longer than before and my IID tells me that i have between 5 bar and 16 bar of pressure with an outside temp of between 10 and 16 degrees so i hope it was just that the valves were not seated properly does the pressure sound right though as it seems to rise and fall a fair bit when on auto

Good that you have determined the issue was a loss of refrigerant and applying a decent vacuum after a full search for a leak is the way to go. However, a system pressure up to 16 bar is too high for R134a. Is the viscous fan duty cutting in ok?
The pressure will fluctuate as the ac cycles on and off but for the ambients of 10-16 celcuis, I would expect high side pressure to be in the region of 8-10 bar.

A high side pressure, when the car is stationary, of 16 bar would definately indicate a problem with the fan not increasing it's duty. Check with IID again and look at the 'fan duty' along with the air conditioning 'system pressure' As system pressure increases, so should the fan duty

Thanks for that I only have a non Bluetooth Iid tool so I only can see the system pressure I assume that it is the high side it reads I only saw 16 bar once when I started it this morning it was at about 3 bar and rose to about 8-10bar after a few mins and was working well when temp was about 10-11 degrees