Polo Mk4: Heating, ventilation, air conditioning
Also for this vehicle: Polo Mk3, Polo Mk5.
Steering & suspension
Body & interior
Engine
General
Transmission
Heating & A/C
Choose Sections to see everything in a chapter, or a chapter title to start at its first page.
Heating, air conditioning171 pages
Heating55 pages
Heating - passenger compartment components31 pages
- Heat exchanger/engine compartment partition panel sealing
Fresh air fan pre-resistance with overheating fuseN24 (version 1) - remove and install3 pages
Fresh air fan pre-resistance with overheating fuseN24 (version 2) - remove and install3 pages
- Air baffles (central) - remove and install
- Air baffles (sides) - remove and install
- Demister nozzle - remove and install
Exhaust valve - remove and install3 pages
Ventilation adjustment mechanism2 pages
- Ventilation / heating adjustment mechanism power connectors
Plenum chamber (ventilation and heating) - remove and install4 pages
Plenum chamber (heating) - disassemble and assemble16 pages
Control motor for natural air valve and recirculation valveV154 (Behr box) - remove and install3 pages
- Control motor for natural air valve and recirculation valveV154 (Behr box) - check
Heat exchanger - remove and install4 pages
Air conditioner116 pages
- Notes on repairing vehicles with air conditioning system and on handling refrigerant
Ventilation adjustment mechanism (heating and air conditioning).4 pages
- Command cables - remove and install
- Service valves - location
Air conditioning with manual adjustment/Climatic6 pages
Plenum chamber (heating and air conditioning/Climatic) - disassemble and assemble14 pages
Plenum chamber (heating and air conditioning/Climatic) - remove and install3 pages
Control motor for temperature adjustment valveV68 - remove and install3 pages
- Control motor for temperature adjustment valveV68 - check
Air conditioning with automatic adjustment, (Climatronic)28 pages
- Heating and air conditioning - passenger compartment components
- Air conditioning command and indicator unit / ClimatronicE87 with Climatronic control unitJ255 - Functions
Air conditioning command and indicator unit / ClimatronicE87 with the Climatronic control unitJ255 - remove and install3 pages
- Air conditioning command and indicator unit / ClimatronicE87 with Climatronic control unitJ255 - check
Air outlet temperature sensor for the feet regionG192 - remove and install3 pages
- Air outlet temperature sensor for the feet regionG192 - check
Air outlet temperature sensor for the central baffleG191 - remove and install3 pages
- Air outlet temperature sensor for the central baffleG191 - check
Air outlet temperature sensor for the evaporatorG263 - remove and install3 pages
- Air outlet temperature sensor for the evaporatorG263 - check
- Sun radiation photo sensorG107 - check
Fresh air aspiration duct temperature sensorG89 - remove and install3 pages
- Fresh air aspiration duct temperature sensorG89 - check
- Ambient temperature sensorG17 - vehicles up to 2007)- remove and install
Plenum chamber (heating and air conditioning/Climatronic) - disassemble and assemble22 pages
Plenum chamber (Climatronic heating and air conditioning) - remove and install3 pages
Air conditioning adjustment and control unitJ127 - remove and install3 pages
- Central valve control motorV70 - check
Defrosting valve control motorV107 and Control motor for temperature adjustment valveV68 - remove and install4 pages
- Valve control motor for defrostingV107 - check
Control motor for natural air valve and recirculation valveV154 (version 1) - remove and install3 pages
Control motor for natural air valve and recirculation valveV154 (version 2) - remove and install3 pages
Air conditioner compressor support8 pages
- Air conditioning compressor support for engines 1.0L (ARA), 1.4L (BBY, BKY) and 1.6L (BAH) - remove and install
- Air conditioning compressor bracket for 1.6L (BAH, BPA) engines - remove and install
- Air conditioning compressor bracket for 1.4L (BAY) engines - remove and install
- Air conditioning compressor bracket for 1.4L (BBY, BKY) engines - remove and install
- Air conditioning compressor bracket for 1.6L (CCRA) engines - remove and install
- Air conditioning compressor bracket for 1,9L - (ASY) engines - remove and install
- Air conditioning compressor bracket for 2.0L (BBX, CFEA) engines - remove and install
Refrigerant circuit - assembly overview27 pages
Air conditioning magnetic couplingN25 manufacturer Delphi (model 1) - repair4 pages
- Air conditioning magnetic couplingN25 manufacturer Delphi (model 2) - repair
Electromagnetic clutch for Delphi compressor (model 2) - remove and install3 pages
Compressor - remove and install5 pages
Condenser - remove and install3 pages
- High pressure sensorG65 - remove and install
- High pressure sensorG65 - check
Quick-release coupling - remove and install5 pages
Filling capacities4 pages
Air conditioning with refrigerant R134a › Technical data132 pages
General information on air conditioning42 pages
Basics of air conditioning4 pages
- Vapor pressure table for R134a refrigerant gas
- Comfort
- Environmental aspects
- Air conditioning effects
Safety at work16 pages
- Product characteristics
- Handling refrigerant gas
- Wear protective goggles
- Use protective gloves and apron
- Refrigerant gas should never come into contact with skin.
- Never inhale refrigerant gas vapors
- Smoking is strictly prohibited
- Soldering work in refrigeration systems
- Active smell
- First aid
- Handling of pressurized tanks
- Do not heat above 50 °C
- Monitor the heating process
- Close empty containers
- Safety measures related to handling refrigerant gas suction and filling equipment
General remarks on the refrigerant gas loop41 pages
Refrigerant gas loop components13 pages
- Distribution of refrigerant gas loop components and their influence on the high and low pressure areas.
- Air conditioning compressor with magnetic coupling:
- Air conditioning compressor without magnetic coupling
- Condenser
- Evaporator
- Collection tank
- Butterfly (throttle)
- Liquid tank
- Expansion valve
- O-ring seals
- Rigid tubes and flexible tubes in the refrigerant gas loop
- Overpressure valve
Refrigerant gas loop components2 pages
Quick coupling connections in the refrigerant gas loop4 pages
Switches and sensors for the refrigerant gas loop and their connections10 pages
- Air conditioning high pressure switch F23
- High pressure switch for magnetic coupling F118
- Air conditioning low pressure switch F73
- Valve connections for switch in the refrigerant gas loop
- Air conditioning pressure switch F129
- High pressure sensor G65
- Pressure and temperature sensor for the refrigerant gas G395
- Magnetic valve for refrigerant fluid circulation N43
- Adjustment valve for the air conditioning compressor N280
Electrical components not assembled in the refrigerant gas loop5 pages
- Pressures and temperatures in the refrigerant gas loop
- Refrigerant gas loop with expansion valve
- Refrigerant gas loop with butterfly (throttle) and collection tank
Checking and measuring work with a pressure gauge2 pages
- Notes on doing repair work on the refrigerant gas loop
Legislation and standards4 pages
Using the climate control recovery, recycling, refilling, and cleaning equipment11 pages
- Important notes for using the Climate control recovery, recycling and refill set or EQ 7098 VAS 6008
- Connect the Climate control recovery, recycling and refill set or EQ 7098 VAS 6008
Empty the refrigerant gas loop with the Climate control recovery, recycling and refill set or EQ 7098 VAS 60083 pages
Fill the refrigerant gas loop with the Climate control recovery, recycling and refill set or EQ 7098 VAS 60083 pages
- Introduce refrigerant gas into the tank of the Climate control recovery, recycling and refill set or EQ 7098 VAS 6008
- Emptying the tank of the Climate control recovery, recycling and refill set or EQ 7098 VAS 6008
Checking pressure values in the refrigerant gas loop10 pages
- Checking pressure values
Verification for vehicles with butterfly (throttle) and collection tank (air conditioning compressor with internal adjustment de2 pages
Verification for vehicles with expansion valve and liquid loop / dryer (air conditioning compressor with internal adjustment dev2 pages
Verification for vehicles with expansion valve, liquid tank / dryer and Adjustment valve for the air conditioning compressor N22 pages
Verification for vehicles with butterfly (throttle), collection tank and regulating valve for the air conditioning compressor N2 pages
Detecting leaks in the refrigerant gas loop4 pages
- Detecting leaks in the refrigerant gas loop with the R134a air conditioning leak detector or EQ 7051 VAG 1796
- Detecting leaks in the refrigerant gas loop by pressurizing the system
- Detection of leaks in the refrigerant gas loop with the air conditioning recovery, recycling, recharging and cleaning set
Cleaning the refrigerant gas loop3 pages
Problems4 pages
Replacing components10 pages
Leaking or damaged components (except the compressor, collection tank and liquid tank)3 pages
Replace the liquid/collection tank and the butterfly (throttle)3 pages
Test equipment and tools3 pages