Technical Service Bulletin
Topic
Market area
Brand
Transaction No.
Level
Status
Release date

AC System not Cooling - HVAC Evaporator leak | Continental GT/GTC/Flying Spur | 18 - 25MY
Bentley: worldwide (2WBE),China 796 VW Import Comp. Ltd (Vico), Beijing (6796)
Bentley
2078190/1
EH
Released for publishing
Jun 18, 2025

New customer code
Object of complaint
Complaint type Position
climate control -> ventilation, air distribution leaks

Vehicle data
Continental GT/GTC 18-25MY & Flying Spur 20-25MY
Sales types
Type
3S4*
3S4*
3S4*
3S4*
3S3*
3S3*
3S3*
3S4*
3S3*
ZG2*
3S3*
ZG2*
3S3*
3S3*
ZG2*
3S4*
ZG2*
ZG2*
Z23*
Z32*
Z24*

MY
2023
2022
2021
2020
2018
2019
2020
2024
2021
2021
2022
2022
2023
2024
2020
2019
2024
2023
2025
2025
2025

Brand Designation Engine code Gearbox code
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*

Documents
Document name
master.xml
evaporator_leakage.pdf

Final drive code
*
*
*
*
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*
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Technical Service Bulletin
AC System not Cooling - HVAC Evaporator leak | Continental GT/GTC/Flying Spur | 18 - 25MY

Transaction No.: 2078190/1
Release date: Jun 18, 2025

Condition
Customer Statement
The customer may find that the A/C system not blowing cold air and / or Cooling performance has declined over time.
Workshop findings:
The following conditions may be present in workshop findings based on customer complaint:
•

No refrigerant recovered during system evacuation.

•

Leak detected in the rear A/C unit using electronic sniffer tool.

•

Visible refrigerant lek at the evaporator core.

•

No leaks at pipe connections, expansion valve, or drain hose.

Technical Background
The evaporator may develop leaks due to corrosion or component fatigue. However it is essential to inspect all connections begore confirming
evaporator failure. This TPI also acts as a Guide for diagnosis for AC Evaporator leakage complaints.
Replace the Evaporator only after leak testing with standard diagnosis methods as per workshop manual and leakage diagnosis flowchart
referenced in the measure section.

Production Solution
Improved parts are implemented in Series Production.

Service
Before conducting any work on the HVAC system the operative MUST refer to the following within Rep.Gr 87
•

Refrigeration system - Safety and general information

•

Refrigerant oil - Special instructions

•

Refrigeration system - To discharge and charge

IMPORTANT TIP: When a HVAC line/connection has been opened the operative MUST always cap/bung the applicable port
using a suitable cap/bung
Refer to the attached and figure 1 below for process flow for confirmation of leakage from Evaporator.

Figure 1
1. Confirm the leakage source by performing a HVAC sniffer test around the evaporator, accessible refrigerant lines and fittings, a UV Die test or
by a soap solution test is also required.
2. If leak is suspected at the evaporator:
•

Remove the rear HVAC unit. Refer to ElsaPro Rep. Gr 87

•

Inspect evaporator core and all connections.

•

Take clear photos showing the leak.

3. If no visible leak at the evaporator:
•

Inspect pipe joints, expansion valve, and drain.

•

If no fault is found and leak persists, replace the evaporator.

4. If suspected that the evaporator is leaking:
•

Remove the evaporator and housing assembly. Refer to ElsaPro Rep. Gr 87

•

Confirm evaporator leakage by traces of UV die, or underwater leak test by means of compressed air inside the Evaporator.

•

Renew all seals and ‘O rings’

•

Vacuum test and recharge system.

•

Verify A/C performance.

Warranty
Warranty Type 110 or 910
Damage Service Number 87 60 – Evaporator
Damage Code 00 50
Labour
Air conditioning Check
Labour operation code 87 01 01 20
Time 50 TU
Refrigerant drained and Filled
Labour operation code 87 03 17 00
Time 50 TU
Hot / Fresh Air Box remove and Install
Labour operation code 85 15 19 00
Time 1220 TU
Evaporator Remove and Install
Labour operation code 87 60 19 50
Time 60 TU

In the event that any parts are required to be replaced please refer to the warranty accounting instructions with Elsa pro this
is due to the numerous vehicle specification and symptom scenarios.

NOTICE
All HVAC related claims will be checked by the Warranty team, any claims which are not deemed as applicable will be
cancelled. In the event that parts are replaced parts without the required attachments or the parts are found to be not at
fault warranty claims will be liable for rejection

Required Parts and Tools
Part Name

Part Number

Evaporator (with housing) 971260122A

Always refer to ETKA Parts Catalogue

Evaporator leakage

Attach protocol showing less/no AC
Refrigerant availability in vehicle

Confirm leakage source by
1. UV Die test (VAS6201A) or
2. Soap solution test

Leakage Suspected at Evaporator
as not found in other part

Leakage
Source

Replace affected leaky
part

Remove Evaporator from vehicle

Confirm Evaporator leakage by traces of UV die, Or
Under water leak test by means of compressed air
inside Evaporator

Yes

Replace Evaporator

Leakage
present on
Evaporator

Other than Evaporator

No

Do not replace
Evaporator, search for
leakage source