Ambient temp sensor

[k3nnis]

Hi All,

The temperature reading that is on the dash on my golf mk4 2.0L sport is not displaying correctly. It's 33C in sydney today and its showing 18C!

How do I fix this?

I have the climatronic version of A/C.

So now when I turn the aircond to the lowest possible temp it's not cold...

Thanks,
K.

[mr gee]

try this

VWVortex.com - MKIV Outside Temp Sensor Bad Or Not?

[k3nnis]

Thanks. I wiggled the front fog lamp type grill on passenger side and it's working again. Hmmm

[k3nnis]

ok got the sensor working again.

Now when the weather is really hot outside, eg 30C+ then my aircond is not cold. Even though set to LO or even 18C.

Do these symptoms suggest a low gas level, or something else?

[JustCruisn]

Check that your fans are working. Whenever the AC is on both fans should be running.
Low gas level means a leak. It is more likely a bad compressor, or field coil. Does the compressor engage ?

Get a pressure test, a lot of mobile guys will test and quote for free.

[k3nnis]

Thanks. New to this stuff. Are the fans easy to locate? How do I know if the compressor engages? Also if it's bad compressor or field coil how much do these set me back to fix?

Can you recommend me any mobile guys to check pressure? I'm in Sydney

Thanks.