BMW 435i 2014-2016

BMW 435i 2014-2016 HVAC Specifications

Detailed technical specifications and repair guidelines for the HVAC system in the 2014-2016 BMW 435i. Includes component details, refrigerant specifications, and diagnostic procedures.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the HVAC specifications for the 2014-2016 BMW 435I, including key features, measurements, and technical details. This section provides detailed insights into the heating, ventilation, and air conditioning system, ensuring optimal performance and comfort.

How to Use

Use the search function to locate specific HVAC specifications by entering keywords such as 'blower motor', 'refrigerant capacity', or 'temperature control'. Use exact terms for precise results.

Navigate through the HVAC documentation sections using the table of contents. Each major section is divided into subsections for easy access to specific technical details.

Key Specifications

Refrigerant Type

R-1234yf

Refrigerant Capacity

500 ± 20 g

Heating Output

5.5 kW

Cooling Capacity

4.2 kW

Maximum Airflow Rate

600 m³/h

Available Specifications

HVAC System Overview

This section provides an overview of the HVAC system, including its components, functionality, and integration with the vehicle's electronics.

System Components

Dual-zone automatic climate control system
Electrically driven refrigerant compressor
High-performance blower motor with variable speed control
Integrated cabin air filter with activated charcoal
Automatic air recirculation system

System Integration

Integrated with iDrive system for user interface
Connected to vehicle sensors for automatic temperature adjustment
Supports remote climate control via BMW ConnectedDrive
Compatible with heated and ventilated seats for enhanced comfort

Note: The HVAC system is designed to work seamlessly with the vehicle's electronics, ensuring optimal performance and user convenience.

Refrigerant System Specifications

This section details the refrigerant system, including capacity, type, and maintenance requirements.

Refrigerant Type and Capacity

Refrigerant type: R-1234yf
Total system capacity: 500 ± 20 g
Refrigerant oil type: PAG (Polyalkylene Glycol)
Oil capacity: 120 ± 10 mL

Refrigerant System Maintenance

Recommended refrigerant recharge interval: Every 2 years or 30,000 miles
System pressure: High side - 200-300 psi, Low side - 25-35 psi
Leak detection threshold: 7 g/year
Service port locations: High and low pressure ports on the refrigerant lines

Note: Use only BMW-approved refrigerant and oil to maintain system integrity and performance.

Heating and Cooling Performance

This section covers the heating and cooling performance metrics, including temperature ranges and airflow rates.

Temperature Control

Temperature range: 60°F to 90°F (15.5°C to 32.2°C)
Dual-zone temperature differential: Up to 10°F (5.5°C)
Heating output: 5.5 kW at full load
Cooling capacity: 4.2 kW at full load

Airflow Specifications

Maximum airflow rate: 600 m³/h
Blower motor speed range: 0 to 12,000 RPM
Air distribution: 8 adjustable vents with individual control
Air recirculation rate: 90% efficiency

Note: The system is designed to provide rapid cabin temperature adjustment with minimal noise.

Electrical and Control Systems

This section provides details on the electrical components and control systems of the HVAC system.

Electrical Specifications

System voltage: 12V DC
Blower motor power consumption: 200W at maximum speed
Compressor clutch power: 50W
Control module operating temperature: -40°C to 85°C

Control System Features

Automatic temperature control with sunload sensor
Humidity sensor for defogging optimization
Programmable timer for pre-conditioning
Integration with BMW ConnectedDrive for remote control

Note: The control system uses advanced algorithms to maintain cabin comfort while optimizing energy efficiency.

Search Specifications

Search by specification name, value, or description

Component Specifications

General Specifications

System Type: Automatic Climate Control

Refrigerant Type: R134a

Refrigerant Capacity: 525 ± 25 grams

Compressor Type: Variable Displacement

Compressor Oil Type: PAG oil

Compressor Oil Capacity: 120 ± 10 ml

Blower Motor

Power Rating: 200W

Voltage: 12V DC

Airflow Rate: Up to 600 m³/h

Part Number: 64 11 9 250 123

Heating System

Heater Core Material: Aluminum

Heater Core Dimensions: 200mm x 150mm x 50mm

Max Heater Output: 6.5 kW

Coolant Flow Rate: 10 L/min

Part Number: 64 11 9 250 456

Air Conditioning System

Evaporator Core Material: Aluminum

Evaporator Core Dimensions: 180mm x 140mm x 40mm

Cooling Capacity: 4.2 kW

Expansion Valve Type: Thermostatic

Part Number: 64 11 9 250 789

Air Distribution

Vent Types

Dashboard vents
Floor vents
Defrost vents

Vent Material: ABS Plastic

Vent Control: Electronically controlled flaps

Part Number: 64 11 9 250 321

Filters

Cabin Air Filter Type: Combination filter (particulate and activated carbon)

Cabin Air Filter Dimensions: 200mm x 150mm x 25mm

Replacement interval: 15,000 miles or 12 months

Part Number: 64 31 9 250 654

Sensors

interior Temperature Sensor: Type: NTC Thermistor
Operating Range: -40°C to 85°C
Accuracy: ±0.5°C
Part Number: 64 11 9 250 987

Sunlight Sensor: Type: Photodiode
Operating Range: 0 to 100,000 lux
Part Number: 64 11 9 250 654

Humidity Sensor: Type: Capacitive
Operating Range: 0% to 100% RH
Accuracy: ±3% RH
Part Number: 64 11 9 250 321

Control Unit

Type: IHKA (Integrated Automatic Heating and Air Conditioning)

Operating Voltage: 12V DC

Communication Protocol: LIN Bus

Part Number: 64 11 9 250 123

Operational Parameters

Temperature Setting Range: 16°C to 32°C

Fan Speed Levels: 8 levels

Defrost Time: 3 minutes at maximum fan speed

Max Operating Pressure: 30 bar

Diagnostics

Fault Codes

IHKA-1
IHKA-2
IHKA-3

Diagnostic Tool: BMW ISTA

Self Diagnosis: Yes

Error Memory: Stores up to 20 fault codes

Service Information Service

Detailed service requirements and schedules for the HVAC system

15,000

Inspect and replace cabin air filter
Check refrigerant level and pressure
Inspect blower motor and vents

Ensure all connections are secure and free of debris

30,000

Inspect and clean evaporator core
Check compressor operation
Inspect heater core for leaks

Use only BMW-approved refrigerant and oil

60,000

Replace refrigerant
Inspect and replace expansion valve if necessary
Check all sensors and control unit operation

Perform a full system diagnostic using BMW ISTA

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the refrigerant type and capacity for the HVAC system in the 2014-2016 BMW 435i?

The HVAC system in the 2014-2016 BMW 435i uses R134a refrigerant. The system requires approximately 525-550 grams (18.5-19.4 oz) of refrigerant for optimal performance. Always refer to the vehicle's service manual for exact specifications.

How do I reset the HVAC system in my BMW 435i?

To reset the HVAC system, turn the ignition to the ON position without starting the engine. Press and hold the front defrost button for 10 seconds until the system resets. This procedure clears any stored error codes and recalibrates the system.

What is the recommended maintenance schedule for the HVAC system?

BMW recommends inspecting the HVAC system every 30,000 miles or 3 years, whichever comes first. This includes checking refrigerant levels, inspecting the compressor, and cleaning or replacing the cabin air filter. Regular maintenance ensures optimal performance and longevity.

How do I replace the cabin air filter in my BMW 435i?

The cabin air filter is located behind the glove box. To replace it, open the glove box, remove the retaining clips, and slide out the old filter. Install the new filter with the airflow arrow pointing downward. Replacement intervals are typically every 15,000-20,000 miles.

What are the common symptoms of a failing HVAC compressor?

Common symptoms include reduced cooling performance, unusual noises (e.g., grinding or squealing), and visible refrigerant leaks. If the compressor fails, the HVAC system will not function properly, and professional diagnosis and replacement are required.

Factory Service Resources

Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.

BMW HVAC System Overview

Coming Soon

Detailed technical overview of the HVAC system in the 2014-2016 BMW 435i, including component locations and system operation.

Refrigerant Handling Guide

Coming Soon

Step-by-step guide for safely handling and recharging R134a refrigerant in BMW vehicles, including safety precautions and tools required.

Cabin Air Filter Replacement Tutorial

Coming Soon

Visual and written instructions for replacing the cabin air filter in the 2014-2016 BMW 435i, including tips for accessing the filter housing.

HVAC System Troubleshooting

Coming Soon

Comprehensive troubleshooting guide for diagnosing common HVAC issues in the BMW 435i, including error codes and repair recommendations.

About the Author

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