Q: AC manifold gauges show no pressure on high or low side.

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My auto ac went from blowing cold air to zero over night, maybe quicker. Then the gauges show no pressure on high or low side. The gauges worked the last time I used them. Assuming my AC system pressure went from working fine to zero, what would the best guess be for the culprit in this case?

thanks .......

The a/c system would need to be pressure tested to check to see if the condenser got damaged and leaked all the refrigerant out or a component like the compressor front seal failed. Have a mechanic like one from YourMechanic come and pressurize the system and isolate the leak.

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