I have a leak at the pressure sensor I believe it must be the O ring seal.

My question is, are the O ring seals special as they are VERY expensive for an O ring, can I fit an ordinary EPDM O ring.

Am I right in thinking the pressure sensor can be removed without losing any remaining gas?

Also what sort of lube do I use on the O ring when installing it?

Edited 2 hours ago2 hr by adfabia1

Hi. Tbe o rings are special rubber so they don't rot.

If there is still pressure in the system it will need recovering first. Illegal to deliberately release to the atmosphere.

To oil the O ring use the appropriate LAG oil for the system.

Going to need a garage with AC equipment.

Good luck

Yes, you need the right type of o-ring.

No, you shouldn't lose any significant amount of refrigerant when changing the seal/sensor, there's a valve under it that closes as it is removed.

PAG oil for lube.

If it's the original pressure sensor it could easily be leaking through itself, rather than at the o-ring seal, I suspect.

Did my old toyota a few years ago and needed special o rings From memory they were green in colour as normal o rings degrade. According to google HNBR (Hydrogenated Nitrile Butadiene Rubber) so reckon skoda oem is the way to go.

Alasdair