AC question

Hello all,

What precautions should one take before opening AC system on an LH vehicle (after it was evacuated) if there is a suspicion at at some point in the past sealant was introduced into the system. It appears that the previous owner of this vehicle had some sealant dumped into the system.

I need to have a couple of defective components replaced (compressor is OK), but I am concerned that if it is a moisture activated sealant, the moment they open up the system it will harden and make the mess out of the system...

I was advised by the shop that they will not be willing to flush a system known to contain a sealant -- not sure why, they said that they have filters on their recovery equipment, but not on their flushing equipment -- does not make much sense to me.

Any advice and/or experiences would be greatly appreciated.

Thank you...

P.S. The system will be deep vacuumed before and after the opening, but I am concerned about the moisture that will inevitable enter when they work on the system...

Reply to
april1st
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Flushing is a waste of time, no flush will dissolve sealant. The system is totaled, replace everything that the sealer touched.

Reply to
aarcuda69062

Reply to
philthy

Thank you -- can you tell why it would cause compressor to die -- b/c of the moisture entering the system and causing the sealant to harden?

The system had about 5psi on the high and low sides according to the shop -- compressor obviously no longer engages...

Thanks

Reply to
april1st

Reply to
philthy

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