Mercury YF1Z-19D594-AA Switch - Air Condit.System - Vacuum

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In the accumulator of a Schrader valve, the refrigerant will not be leaked when changing the HVAC Pressure Switch. First, remove the electrical connector from the HVAC Pressure Switch. Afterwards, remove the HVAC Pressure Switch from the accumulator by unscrewing it. Just before you install the new switch, make sure to lubricate its O-ring with clean refrigerant oil appropriate for it. Screw on this new switch until tight by hand to the threads of an accumulator and then tighten it to its torque. Lastly, reconnect an electrical connector.

This switch is used only on 2008 and earlier models with accumulators. Later models with receiver/driers don't use a pressure cycling switch. The pressure cycling switch is located on top of the accumulator and detects low refrigerant line pressure at 22 to 28 psi. It switches the A/C system off and then back on again at 40 to 47 psi. If the pressure increases over 550 psi, the pressure cut-off switch shuts the system off. To replace the pressure cycling switch, unplug the electrical connector, unscrew the switch from the accumulator, lubricate the switch o-ring with clean refrigerant oil, screw the new switch onto the accumulator threads until hand tight, and then tighten it securely. Finally, reconnect the electrical connector.

This switch is used only on 2008 and earlier models with accumulators. Later models with receiver/driers don't use a pressure cycling switch. The pressure cycling switch is located on top of the accumulator and detects low refrigerant line pressure at 22 to 28 psi. It switches the A/C system off and then back on again at 40 to 47 psi. If the pressure increases over 550 psi, the pressure cut-off switch shuts the system off. To replace the pressure cycling switch, unplug the electrical connector, unscrew the switch from the accumulator, lubricate the switch o-ring with clean refrigerant oil, screw the new switch onto the accumulator threads until hand tight, and then tighten it securely. Finally, reconnect the electrical connector.

Yes, transducers are used on V6 engine models only.