I'm planning to take a look at my home HVAC system myself, as I don't think it's performing too well. I'm fairly mechanically inclined, so nothing should go wrong.
What I'm looking for is advice how to measure pressure at the service ports. Is there a single pressure gauge that I can buy? Or do they only come as manifold gauge sets? I don't think I'll be doing any charging myself, but who knows what the future brings
Are all manifold gauge sets more or less equal if they will be seeing light duty? What's the difference between a $30 set and $150? Durability? Accuracy?