Evaporator, Removing And Installing: Notes

There Is Refrigerant Oil In The Removed Evaporator That Must Be Re-Delivered To The Refrigerant Circuit (With New Evaporator). Refer to COMPONENTS, REPLACING R1234yf / REFRIGERANT CIRCUIT COMPONENTS, REPLACING R134a or COMPONENTS, REPLACING R1234yf / REFRIGERANT CIRCUIT COMPONENTS, REPLACING R134a .

Revised A/C units and evaporators are gradually being installed from MY 2012 (use depends on the vehicle version) (A/C unit part number "8T_ 820 005"). It is not possible to replace the evaporator on this A/C unit when the A/C unit is installed. Before working on the evaporator, check if it is available as an installation kit either without the evaporator housing or only together with the housing. If the evaporator is available only together with the housing, then it is necessary to remove the A/C unit and replace the evaporator with the evaporator housing. Refer to EVAPORATOR HOUSING, REMOVING AND INSTALLING .

For refrigerant R1234yf, there must not be any separable connection points in the refrigerant circuit in the vehicle interior (for example, separating points on the refrigerant lines to the evaporator). Therefore the A/C unit (with the evaporator housing) must always be removed on these vehicles and the evaporator with the refrigerant lines must be completely replaced. Refer to the HEATER AND A/C UNIT, REMOVING AND INSTALLING .

Evaporators with a block depth -A- of approximately 40 mm (A/C unit with the part number "8K_ 820 005") are being installed from start of production through the changeover from MY 2012. These evaporators can be replaced with the A/C unit still installed. From MY 2012, evaporators with a block depth -A- of approximately 50 mm are being installed (A/C unit with the part number "8T_ 820 005") as a running change depending on the vehicle version. These evaporators can only be replaced when removing the A/C unit together with the evaporator housing.

Fig 1: Identifying Evaporator

Courtesy of AUDI OF AMERICA, LLC

There is a label -A- on the outside of the A/C unit with a part number -B- that tells which version is installed.

Fig 2: Beginning 08.2007 Comfort A/C System With An Air Distribution Housing With Optimized Air Distribution (Running Change)

Courtesy of AUDI OF AMERICA, LLC

The part number -B- on the label -A- can be read, for example, when the CD changer is removed (depending on the vehicle equipment level). Refer to appropriate service information. .

Pay attention to the correct allocation of the expansion valve to the evaporator (there are different versions).

The Refrigerant Pipe -D- On The Audi Q5 Hybrid Is Wrapped With Insulation (Butyl Or Tar Tape) To Reduce Noise. The Insulating Tape Shields The A/C Compressor Noise, Which Seems To Be Louder When The Engine Is Idling.

Fig 3: Disconnect Both Refrigerant Lines Leading To Evaporator Using T40147

Courtesy of AUDI OF AMERICA, LLC

If the evaporator is going to be replaced on an Audi Q5 Hybrid, then wrap the refrigerant pipe -C- on the replacement evaporator with insulating tape. Approximately 30 cm of 5 cm wide insulating tape (commercially available butyl or tar tape) -B- with a 3 mm strength will be needed.

Fig 4: Identifying Refrigerant Pipe Components

Courtesy of AUDI OF AMERICA, LLC

This insulating tape -B- is used when handling refrigerant as commercially available butyl or tar tape. It is available in refrigerant materials stores and comes in rolls approximately 10 m long.