Central Air Conditioner – Diagnostics and Troubleshooting with Refrigerant Types

Symptoms:
High discharge & suction pressure (most common), High sub-cooling , Unit will not cool properly

New condenser installations with nitrogen holding charge. Always remove nitrogen before charging system.
Nitrogen is a non-condensable and will not condense to a liquid. Always read your unit tag before installation to see if it has a holding charge of dry nitrogen.

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