ISSUE:

There may be poor A/C performance and/or a "thumping" noise coming from the A/C system on some vehicles. This may be caused by the location of the A/C cycling switch which may cause the switch to cycle too often.

ACTION:

Replace the suction accumulator and suction hose assemblies. The new accumulator and hose moves the cycling switch to obtain a more accurate pressure cycle. This should reduce the possibility of a thump and improve A/C performance. Refer to the following Service Procedure for details.

SERVICE PROCEDURE

1. Verify the concern by listening for a thump during A/C compressor engagement and/or install pressure gauges and verify cycle pressures are within specifications with a full refrigerant charge. The switch should cycle off at 23 psi ±1.
2. If no thump is present or pressures are within specifications, refer to the appropriate Service or Workshop Manual for additional diagnostic procedures.
3. If a thump is present or the A/C switch cycles off at pressures higher than 24 psi, replace the A/C suction accumulator and suction hose assemblies. Refer to the Service or Workshop Manual for replacement procedures.

OTHER APPLICABLE ARTICLES:

NONE

WARRANTY STATUS:

Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage

DEALER CODING

OASIS CODES:

208000, 208200, 208999, 702100, 702300