Possible leak of unknown size in the heat pump in the remodeled house we bought. After ripping off for more R410a I decided to give this an extra try. I will post an update in the future. I thought it would be good for DIYers to know here, make sure you are using the low pressure port on your machine to inject material and the machine must be AC powered to ensure the port is low pressure. or at least mine did. When it is in heating mode, it is a high pressure port. The instructions suck and the attachment of the hose to the syringe isn't the best. Definitely needed a caulking gun, but it was slow. The supercharger might have calmed it down a bit, but it could also have been entirely in my head. Do your research before DIY.
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