Reddit reviews A/C Manifold Gauges Set Manifold, Gauge & Hose Set Industrial HVAC Gauges
We found 1 Reddit comments about A/C Manifold Gauges Set Manifold, Gauge & Hose Set Industrial HVAC Gauges. Here are the top ones, ranked by their Reddit score.
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Not something easily done DIY if you haven't done it before. You would need a manifold gauge and know how to use it. If he is quoting 3lbs refrigerant as part of the coil replacement chances are it's low. Replacing the coil shouldn't require any additional refrigerant as the existing stuff would be vacuumed out before the coil was removed and pumped back after it was replaced.
Definitely call another company and get their opinion.