possibly pressure switch (or sensor) failure. doesn't see pressure in the system so doesn't switch on the compressor and maybe didn't run the fans at full chat to keep the pressure down in the condensor so it vented out of the pressure relief valve.

at the very least you will need to have it recharged, and you should have some oil added now that you've vented a load.

as you've found out, overriding the circuit controls for some time is not a good idea, but can be useful for a moment to test compressor operation.

sounds like you should find a local expert to check it rather than a kwik fit recharge monkey