GM 13587668
Pressure Relief Valve, Green Line

The first step to switch out the a/c high pressure switch requires a/c system refrigerant recovery. The cleaning process must happen first before the snap ring removal step so the high pressure switch electrical connector needs disconnection. Create the a/c high pressure switch removal process by using snap ring pliers (J 5403) along with removing the snap ring to extract the switch from the compressor. Either the o-ring remover (J 9553-01) or another o-ring tool can be used to remove the old o-ring seal from the switch cavity. Inspect both the cavity and the o-ring groove thoroughly for any foreign or dirty material before cleaning as required. The installation requires new 525 viscosity refrigerant oil for lubricating an o-ring before positioning it into the switch cavity groove. Apply the same oil to the control switch housing before fully inserting it into the cavity when the switch reaches its lowest point. To install the snap ring use snap ring pliers (J 5403) by placing its high part facing the switch housing into the retaining groove with precision placement. The a/c system evacuation follows by recharging operations then comes a leak test of fittings using the halogen leak detector (J 39400-A).

Recovery of refrigerant then cleaning the switch area should be performed before withdrawing the snap ring. First detach the electrical connector from the a/c high pressure switch before using the j 5403 snap ring pliers (J 5403) for snap ring removal. Next use j 9553-01 o-ring remover (J 9553-01) to remove the old o-ring seal from the switch cavity after taking out the a/c high pressure switch from the compressor. Examine the switch cavity together with o-ring groove to check for any dirt presence and remove foreign substances as needed. Insert a new o-ring into the switch cavity by placing it into the groove and lubricate it with new 525 viscosity refrigerant oil. The control switch requires lubrication with the same oil before placement into the cavity until the switch reaches the bottom. Fitting the snap ring requires j 5403 snap ring pliers (J 5403) to position the high part of the curved sides next to the switch housing and the ring inside the retaining groove properly. The vehicle receiving an a/c system evacuation then charging and leak testing with the j 39400-a halogen leak detector (J 39400-A).

The first step for a/c high pressure switch replacement requires refrigerant extraction from the a/c system. Check and clean the surrounding area of the control a/c high pressure switch before removing its snap ring. The connector of the a/c high pressure switch should be detached first after which the j 5403 snap ring pliers (J 5403) will be used to take out the snap ring. The j 9553-01 o-ring remover (J 9553-01) should be used to remove the old o-ring seal from the switch cavity of the compressor-high pressure a/c switch. Check the switch cavity along with the o-ring groove in the rear head for any foreign material and dirt and clean it when needed. The installation process requires application of new 525 viscosity refrigerant oil to the o-ring which should then be placed inside the switch cavity groove. The same oil should be used to lubricate the control switch housing before the switch installation into the cavity until it leaves enough space at the edge of the cavity. Install the snap ring with j 5403 snap ring pliers (J 5403) by greeting the high point of curved sides against the switch housing before placing it in the retaining groove. The a/c system evacuation and recharging process should finish with j 39400-a halogen leak detector (J 39400-A) evaluations of component fittings.

Start the air conditioning low pressure switch replacement by unplugging its electrical connector. Separate the a/c low pressure switch from the accumulator and remove its original o-ring seal at the switch port. Use a new o-ring seal before installing the a/c low pressure switch onto the accumulator while torquing it to 4.8 n.m (42 lb in). Reconnect the electrical connector to the a/c low pressure switch after which conduct a leak test through the fittings using the halogen leak detector (J 39400-A).

First disconnect the electrical connector from the a/c low pressure switch before removing the switch from the accumulator and throwing away the o-ring. Place a new o-ring seal on the switch while watching the fastener notice for guidance. Secure the a/c low pressure switch onto the accumulator by applying 6 n.m (53 lb in) torque. Reconnect the electrical connector to the a/c low pressure switch after performing a leak test with the j 39400-a on all component fittings.

First disconnect the electrical connector from the a/c low pressure switch before removing the switch from the accumulator and throwing away the o-ring. Place a new o-ring seal on the switch while watching the fastener notice for guidance. Secure the a/c low pressure switch onto the accumulator by applying 6 n.m (53 lb in) torque. Reconnect the electrical connector to the a/c low pressure switch after performing a leak test with the j 39400-a on all component fittings.

The process to replace the a/c high pressure switch begins with recovering refrigerant from the system while you clean the switch area followed by snap ring removal. Remove the snap ring of the a/c high pressure switch by disconnecting its electrical connector and using j 5403 (Snap Ring Pliers). The first step involves using the j 9553-01 (O-Ring Remover) to detach the old o-ring seal from the switch cavity after taking out the a/c high pressure switch from the compressor. Check the switch cavity along with the o-ring groove for foreign material then clean them. A new o-ring needs lubrication using refrigerant oil with 525 viscosity before insertion into the switch cavity groove. Apply oil to both the control switch housing and the same oil onto the cavity before placing the switch inside until it reaches the bottom end. Use the j 5403 (Snap Ring Pliers) to reinstall the snap ring while placing the high point of its curved sides next to the switch housing and ensuring proper insertion into the retaining groove. The j 39400-a (Halogen Leak Detector) should be used for conducting a system leak test after a/c system evacuation and recharge.

First disconnect the electrical connector from the a/c low pressure switch before removing the switch from the accumulator and throwing away the o-ring. Place a new o-ring seal on the switch while watching the fastener notice for guidance. Secure the a/c low pressure switch onto the accumulator by applying 6 n.m (53 lb in) torque. Reconnect the electrical connector to the a/c low pressure switch after performing a leak test with the j 39400-a on all component fittings.

Perform a leak test on the fittings of the components using the J 39400-A.

Attach the A/C low pressure switch to the accumulator, tightening it to 6 N.m (53 lb in) as per the Fastener Notice in Service Precautions.

Reconnect the low pressure switch electrical connector.

Place a new O-ring seal onto the switch, then install the A/C low pressure switch back onto the accumulator.

Use the J 5403 Snap Ring Pliers (J 5403) to install the snap ring, ensuring the high point of the curved sides is adjacent to the switch housing and that it is properly seated in the retaining groove.

Install the A/C low pressure switch to the accumulator, ensuring to tighten the switch to 4 N.m (35 lb in).

Remove the A/C low pressure switch from the accumulator and discard the O-ring seal from the A/C low pressure switch port on the accumulator.

Remove the switch from the accumulator and discard the O-ring.

Install a new O-ring seal onto the switch.