A/C turning off when idle

[jmandawg]

CTScott, I test the resistence:

12.09K between the grey and black wires
7.26K between the yellow and black wires

Does this mean it's bad? Also it looks like changing it requires a full discharge/evac/recharge?

[CTScott]

Originally Posted by jmandawg

CTScott, I test the resistence:

12.09K between the grey and black wires
7.26K between the yellow and black wires

Does this mean it's bad? Also it looks like changing it requires a full discharge/evac/recharge?

Those are fine. The next step is to check the sensor's actual output while the system is on.

To do that you need to measure the following. To do so you need to poke something tiny and sharp through the wire insulation and into the wire (I like to use a small sewing needle):

Voltage of the yellow wire to ground (should be 5 Volts)

Voltage of the grey wire to ground (should be between 0.76 volts and 4.74 volts)