Air con Mk7 GTD

[mjh_056]

Popped out midday, car been sitting in direct sunlight and melting inside and within 3 minutes the GTD was cold the to point that had to lift the temperature up to make comfortable.

Made a point of timing it as saw this post earlier in the day.

My wife has a habit of turning off the A/C on the knob so even though temperature is set to 16 or Lo it does not really get cold, just cool, so maybe the A/C is turned off?

There is also an A/C setting in the car menu where you can select the power of the output, so another thing to check if not icy cold in a few minutes.

[chrismc]

Most helpful cheers!

A/C was definitely on & selected to Max A/C on the switch.

I think il be asking the dealer to re-charge it

[GTD1414]

I'm an A/C engineer by trade, domestic/commercial, not automotive, all I know is they use R134a.

There's a few things you can check for a full charge of refrigerant.

The air temperature difference (between air on and air off the coil) should be around 10-15degC. e.g outside temp (or cabin temp if in re-circ mode) 20degC, air off should be between 5-10degC. This will differ from type of system/refrigerant type etc etc.

There is also a nickname/term we use called "sweating back" which indicates a full charge of gas, without the use of/attachment of gauges.
Whilst in cooling mode, the suction pipe from evaporator to compressor (larger diameter pipe) will be ice cold, will condensate and form water on its surface, (depending on RH) but not freeze/form frost.

Not sure where the suction pipe is exactly on the GTD, will check this later for you. 

[GTD1414]

Its just to the left of the oil dipstick, changes from flexible hose to aluminium then runs under the coolant tank.

[chrismc]

Its just to the left of the oil dipstick, changes from flexible hose to aluminium then runs under the coolant tank.

Cheers

[GTD1414]

Its just to the left of the oil dipstick, changes from flexible hose to aluminium then runs under the coolant tank.

Cheers

How did you get on chrismc?