Help with vintage air

[cjsgarage]

I share Mitch's perspective. If you came in and asked for a charge, we would charge it. If we got wrapped up in every job, we would never make money.

But yes. The switch is open to the refrigerant on the other side, so you have to drain it to swap the switch. My A/C machine will charge without the compressor running, and it only takes 15 minutes to do an evacuate and recharge. Maybe you can check the shop and see if they'll cut you a deal to evac and recharge with you there so you can swap the switch right quick.

If there's pressure in the system, a switch should have continuity (a couple of ohms). If the system drops below 25psi on the low side the switch should be open (infinite ohms, no continuity).

If you have a trinity switch, two of the terminals should act as I stated above. The third is the activate wire for the cooling fan relay.


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