Air conditioning & heating
1 documented fault — symptoms, causes and workshop fixes.
Lack of or no air flow through fascia vents
AC/heater air direction flap stuck or sticking.
Overview
- Affects
- All models with climate control.
Symptoms
Unable to switch off air flow to footwell.
Repair steps
- Remove footwell heater duct.
- Ensure AC/heater air direction flap is in closed position.
- Fit foam pad to inside of heater housing footwell outlet.
- Ensure foam pad secured properly.
- Repeat procedure for opposite side.
Parts
| Part | Part number | Qty |
|---|---|---|
| Foam pad | LR149627 | 2 |
Data: Motorwise Workshop. Bulletin 1.
Other
1 documented fault — symptoms, causes and workshop fixes.
Whining noise from transfer box when driving in 3rd gear at approximately 20-30mph (30-65kph)
Overview
- Affects
- All models with four wheel drive.
- Remedy
- Fit new part
- Parts
- 1 part
Cause
Faulty detent pin located on transfer box.
Repair
- Fit new detent pinto transfer box.
- Tighten detent pin to 20 Nm.
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| Detent pin | LR178583 | 1 |
Data: Motorwise Workshop. Bulletin 2.
Glossary
Technical terms used in this guide.
- Nm
- Newton-metres — the standard unit for how tightly a bolt is done up
- AC/Heater
- The heating and air-conditioning system
- Transfer Box
- The gearbox that splits drive between the front and rear axles, and selects high/low range
Frequently asked questions
What are the common faults with the Land Rover Defender 3.0 i6 P400 MHEV?
This guide contains two workshop bulletins for the Land Rover Defender 3.0 i6 P400 MHEV. Of these, one concerns the air conditioning and heating. Symptoms, causes, repair steps and part numbers are shown where supplied.
Does every Land Rover Defender 3.0 i6 P400 MHEV have these faults?
No. These are patterns documented across the model by workshops, not predictions for an individual vehicle. Where a fault applies only to certain vehicles or VIN ranges, that is listed with the fault.
Can I check for Land Rover Defender 3.0 i6 P400 MHEV faults myself?
Many of them. The documented symptoms can be seen, heard or felt during a test drive.