Technical Service Bulletin
Topic

AC System not Cooling - HVAC Evaporator leak | Continental GT/GTC/Flying Spur | 18 26MY

Market area

Bentley: worldwide (2WBE),China 796 VW Import Comp. Ltd (Vico), Beijing (6796)

Brand

Bentley

Transaction
No.

2078190/3

Level

EH

Status

Released for publishing

Release date

Oct 8, 2025

New customer code

Object of complaint

Complaint type Position

climate control -> ventilation, air distribution leaks

Vehicle data
Continental GT/GTC 18-26MY & Flying Spur 20-26MY
Sales types

Type MY

Brand Designation Engine code Gearbox code Final drive code

3S3* 2018 E

*

*

*

3S3* 2019 E

*

*

*

3S3* 2020 E

*

*

*

3S3* 2021 E

*

*

*

3S3* 2022 E

*

*

*

3S3* 2023 E

*

*

*

3S3* 2024 E

*

*

*

3S4* 2019 E

*

*

*

3S4* 2020 E

*

*

*

3S4* 2021 E

*

*

*

3S4* 2022 E

*

*

*

3S4* 2023 E

*

*

*

3S4* 2024 E

*

*

*

Z23* 2025 E

*

*

*

Z23* 2026 E

*

*

*

Z24* 2025 E

*

*

*

Z24* 2026 E

*

*

*

Z32* 2025 E

*

*

*

Z32* 2026 E

*

*

*

ZG2* 2020 E

*

*

*

ZG2* 2021 E

*

*

*

ZG2* 2022 E

*

*

*

ZG2* 2023 E

*

*

*

ZG2* 2024 E

*

*

*

Documents
Document name
master.xml
evaporator_leakage.pdf

Transaction No.:

Technical Service Bulletin
AC System not Cooling - HVAC Evaporator leak | Continental GT/GTC/Flying Spur
| 18 - 26MY

2078190/3
Release date: Oct 8,
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 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 a underwater leak test by means of compressed air inside the
Evaporator.

•

Raise a full Technical DISS query and include a video of the underwater leak test being performed and
the result.

•

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. HVAC Sniff test
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 conducting a 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