Q: How can I tell if my compressor is on?
Q: Where is the low pressure cut-off switch?readallthebooks wrote: ↑Sun Jul 16, 2017 6:40 pmthe compressor is on when the clutch engages. the drive belt continuously moves the pulley so if you aren't familiar you may not know where to look. basically in laymans terms the middle metal piece will spin when the clutch is engaged and the compressor is on.
Q: Where is the temperature cut-off switch? I heard it can fail and can be jumpered during diagnosis.jimmy57 wrote: ↑Mon Jul 16, 2012 11:54 pmThere is a black metal line on passenger side of engine compartment behind engine. It comes out of firewall next to a silver/aluminum line that is smaller. On the black line is a silver and white switch with a black connector on it. If you depress the metal loop on the side of connector and unplug it. Now with engine running and everything set so the A/C should be running, bend a paper clip into a "U" and bridge the two metal terminals down in the connector.
A: The temp cut-off switch comes out of the driver's side of the compressor (opposite the clutch). It is a cylindrical brass piece with two wires coming out. To jumper it, trace the two wires back to where they connect to the wiring harness, disconnect them, and connect a wire between the two sockets on the wiring harness.
Q: Can I fill the system with a can of refrigerant even if the compressor isn't running? One post suggested that simply connecting the can to the low port and running the A/C would allow the refrigerant to enter the system, eventually starting the compressor.
A: See responses below. Essentially, yes.
Q: Can I visually inspect the evaporator without tearing apart the entire dash?
A: Yes, the evaporator is toward the driver's side of the cylindrical blower motor. Remove the blower motor and use a dental mirror to look left to see the evaporator. It should look perfectly shiny, and has surely failed if it looks corroded, greasy, or dark.
Q: When people do DIY work on their A/C, how do they suck out the refrigerant?
Q: Where is the accumulator / dryer?
A: The accumulator / dryer is the big tank below the passenger's headlight.
Q: Where is the high pressure port for measuring refrigerant charge with a manifold gauge set?
A: There is no high pressure port, at least on the 2000 V70.
Are there any other points of failure besides the evaporator, accumulator, clutch gap, condenser, low-pressure cut off switch, and temperature cut-off switch? Isn't there an A/C relay in the engine bay, driver's side, at the base of the windshield? And what made those clicks I heard from the front passenger's footwell when the compressor came on?
-- Edited to clarify questions and put answers inline.