Loesung dieser Aircon Geraeusche

[Erich]

Subject: Honking/Hooting A/C expansion valve
Author: shogun
Posted on: 2005-12-09



The following air conditioning information was copied from BMW’s AG TIS CD. Notice date was October 1994.

Group 64; 64 01 94 Woodcliff Lake, NJ; October 1994; Heating and Air Conditioning; Product Engineering

SUBJECT: Honking/Hooting from Air Conditioning Expansion Valve

Models: E34, E32, E36 from 9/92 to 4/94 production.

Situation: Complaint of intermittent loud honking or hooting noise from A/C expansion valve.

Affected Vehicles: E34 vehicles equipped with R-134a A/C refrigerant (since 9/92 production). In addition, we have received a few complaints with E32 and E36 vehicles. The new expansion valve was incorporated into production on E34 vehicles as of 4/94.

Cause: Expansion valve can be excited into resonance under certain operating conditions.

Solution: If a customer complaint of honking or hooting from A/C is encountered, replace the expansion valve with P/N 64 11 8 362 851. This unit employs a friction damper to prevent the valve from resonating.

Parts Information: Modified Expansion Valve w/Damper- P/N 64 11 8 362 851

Warranty Status: Parts and labor are reimbursable under the terms of the applicable BMW New Car Limited Warranty

Defect Code: 64 51 12 39 00

Labor Operation: 64 50 009Recover & Recharge refrigerant

Labor Allowance: 14 FRU

Labor Operation: 64 51 520Replace Expansion Valve

Labor Allowance: Refer to appropriate Flat Rate Manual