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pop3

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Everything posted by pop3

  1. Right, Thank you that's an informative link , seems like its to stop condensation and insulate the valve, Dont know why they don't just cover it with foam like the rest of the pipework, My guess is it may get very hot,
  2. Its not a simple google that's why I'm here, Cant even find a photo of the black gunge over an expansion valve and that's crazy as every unit I have ever seen is sprayed with the bloody stuff ????
  3. Is there any retired air conditioning engineers out there or a competent DIY air-con hero ? My question is this , What is the black sticky substance they put on the expansion valve ? Also what is the point of putting that gunge on it and is it really necessary , The reason I ask is I am fitting a replacement unit in my van but it has no black gunge on the expansion valve its just shiny copper. Thanks for any help you can give.
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