Air Conditioning Problem

[Chris_C]

Hey Guys,

I did a search, but couldn’t seem to find anything in depth with the same symptoms (sorry if this has been covered before!)

2000 911 966

The other day my air conditioning stopped working out of the blue - it was as strong as ever up until that point which leads me to believe that it is not a refrigerant leak

When the key is in the ignition and turned to the first position i can hear servos moving continuously within the dash, this does not stop over time, nor does it change when the temperature setting is adjusted on the climate control unit.

When the air conditioning is on and the air temperature is set to low it almost seems as if the heater is on. In recent days the temperature has dipped to around 10 Celsius, and should be cooling the interior of the car - not heating it!

Any help or suggestions are greatly appreciated :)

Chris

[wwest]

Hey Guys,

I did a search, but couldn’t seem to find anything in depth with the same symptoms (sorry if this has been covered before!)

2000 911 966

The other day my air conditioning stopped working out of the blue - it was as strong as ever up until that point which leads me to believe that it is not a refrigerant leak

When the key is in the ignition and turned to the first position i can hear servos moving continuously within the dash, this does not stop over time, nor does it change when the temperature setting is adjusted on the climate control unit.

When the air conditioning is on and the air temperature is set to low it almost seems as if the heater is on.

Actually the "heater" is ALWAYS ON. Engine coolant at 190F flows through the heater core continuously, no blockage, no "metering". That's why the lower right side of your right leg always feels warmed/hot...IT IS..!!

In recent days the temperature has dipped to around 10 Celsius, and should be cooling the interior of the car - not heating it!

Any help or suggestions are greatly appreciated :)

Chris

If the reheat/remix blend door happens to be stuck in the full reheat position then you will get NOTHING but heated outlet airflow.

"...servos moving continuously.."

No, more probable that the reheat/remix blend door's servomotor is TRYING to move the door away from the full reheat/remix position.

If you set the temperature control to max heating the blend door will need to be in the full reheat position and the servomotor sound should stop.

Is the compressor cycling on and off...?

[Chris_C]

The compressor is definitely cycling on and off , I will try setting it to full heat this afternoon and see what happens

If this is the case, what is the procedure involved with fixing it?

Thanks!! :renntech:

Hey Guys,

I did a search, but couldn’t seem to find anything in depth with the same symptoms (sorry if this has been covered before!)

2000 911 966

The other day my air conditioning stopped working out of the blue - it was as strong as ever up until that point which leads me to believe that it is not a refrigerant leak

When the key is in the ignition and turned to the first position i can hear servos moving continuously within the dash, this does not stop over time, nor does it change when the temperature setting is adjusted on the climate control unit.

When the air conditioning is on and the air temperature is set to low it almost seems as if the heater is on.

Actually the "heater" is ALWAYS ON. Engine coolant at 190F flows through the heater core continuously, no blockage, no "metering". That's why the lower right side of your right leg always feels warmed/hot...IT IS..!!

In recent days the temperature has dipped to around 10 Celsius, and should be cooling the interior of the car - not heating it!

Any help or suggestions are greatly appreciated :)

Chris

If the reheat/remix blend door happens to be stuck in the full reheat position then you will get NOTHING but heated outlet airflow.

"...servos moving continuously.."

No, more probable that the reheat/remix blend door's servomotor is TRYING to move the door away from the full reheat/remix position.

If you set the temperature control to max heating the blend door will need to be in the full reheat position and the servomotor sound should stop.

Is the compressor cycling on and off...?

[phillipj]

Don't rule out your ignition switch. When one goes out it can cause all kinds of issues with your climate control. Try jiggling the ignition key and see if it makes any difference.

[Chris_C]

Don't rule out your ignition switch. When one goes out it can cause all kinds of issues with your climate control. Try jiggling the ignition key and see if it makes any difference.

Interesting - I will take a look at that as well

- Turning the heat setting to high does stop the servo sound

- As the temperature is reduced from high the servo sound starts becoming intermittent

- The servo sound becomes more continuous as the temperature is lowered

Chris

[714dre]

I immediately thought Ignition Switch also.

My A/C stopped out of nowhere one day when I had to drive in stop-and-go traffic for 45 minutes in a wonderful socal heatwave a couple months ago.

Replaced the lock assembly and no more problems.