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Posted (edited)

Hi,

 

Due to a leak I have to exchange the A/C condensers of my 996 4S (2004). However, my question is A/C and not car specific.

 

After draining the system in the shop, I have removed the condensers some days ago and my new ones will arrive probably today. Sure, I will replace the filter as well.

 

My concern is: Since the system was open for a while, ambient (humid) air came into the system. What is the preferred procedure for the filter then? Do I better exchange the filter immediately after 

I closed the A/C circuit (installed the new condensers) or better only short prior to refill the system (which could be after the weekend only). Or should I even only close the system short before refilling?

 

Any experience or suggestion is appreciated.

 

Thanks!!

Edited by thormann

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6 hours ago, thormann said:

Hi,

 

Due to a leak I have to exchange the A/C condensers of my 996 4S (2004). However, my question is A/C and not car specific.

 

After draining the system in the shop, I have removed the condensers some days ago and my new ones will arrive probably today. Sure, I will replace the filter as well.

 

My concern is: Since the system was open for a while, ambient (humid) air came into the system. What is the preferred procedure for the filter then? Do I better exchange the filter immediately after 

I closed the A/C circuit (installed the new condensers) or better only short prior to refill the system (which could be after the weekend only). Or should I even only close the system short before refilling?

 

Any experience or suggestion is appreciated.

 

Thanks!!

 

I believe you are referring to the dryer assembly as a filter.  I would suggest the best path forward would be to change out the dryer for a new one, close up the system, and pull a very high vacuum on the system for 30 min. to 1 hour to get rid of any moisture.  Check the system can hold the high level of vacuum without the pump running for 15-30 min.; if it does hold, start the recharging procedures.

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Thanks for your reply, JFP!

 

You are right, my question refers to the dryer.

 

Prior to refilling the shop will vacuum and test the system on Monday. 

 

Is it advisable to change the filter and close the system right now or shall I better wait until Monday.

 

Thanks again!

 

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5 minutes ago, thormann said:

Thanks for your reply, JFP!

 

You are right, my question refers to the dryer.

 

Prior to refilling the shop will vacuum and test the system on Monday. 

 

Is it advisable to change the filter and close the system right now or shall I better wait until Monday.

 

Thanks again!

 

 

You should install the new dryer just before putting the system under vacuum.

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O.K., but any concerns  to close the system now and change the dryer later prior to putting the system under vacuum?

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4 hours ago, thormann said:

O.K., but any concerns  to close the system now and change the dryer later prior to putting the system under vacuum?

 

That should be fine.

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