Does anyone have some idea on my A/C repair?

[casliupeng]

Originally Posted by SirDigby

you need to find out if compressor is working before spending any amount of dollars...

Thanks, how could I check that by myself? Does there need some detect machines? Given my hoses are disconnected, could I turn on A/C to check by my eyes?

[SirDigby]

Originally Posted by casliupeng

Thanks, how could I check that by myself? Does there need some detect machines? Given my hoses are disconnected, could I turn on A/C to check by my eyes?

it will not turn on because the pressure switch will cut the power. i don't know if it's a NC or NO switch. you'd need to figure out how to by-pass it. or, you might be able to run power directly to compressor. you would need to get a wiring diagram for that. you would want to remove the belt before testing. also, i don't know if you'd need to engage the clutch on the compressor to check operation. it's prob easiest to defeat pressure switch(s) and operate from HVAC controls... a NO switch will work if unplugged. a NC switch will need to be jumpered at the connector. check pressure and suction at inlet/outlet. your manifold gauges will be needed for this...
so here is the second person telling you that a manifold gauge set and a vacuum pump is needed to complete a/c repairs.