Usually the heater is removed to replace the evaporator or to repair the heater.
Before completing the task, we discharge the air conditioning system, for this:
- you need to release the refrigerant through valve 1 of the low pressure pipeline and valve 2 of the high pressure pipeline.
- to release the refrigerant, you need to unscrew the protective caps of the valves and press the valve stems with a suitable tool.
Refrigerant must be released in a thin stream.
Bleeding off the refrigerant may splash some of the oil mixed with it.
If it is necessary to replace the valve, we unscrew it from the pipeline fitting with a key similar to the metal cap of the wheel valve
Remove the valve
Drain the liquid from the engine cooling system (article - Checking and replacing the Nissan Almera engine coolant)
Remove the air intake with resonator assembly (article - Replacing the Nissan Almera air filter)
Removing the lining of the floor tunnel (article - How to remove the lining of the Nissan Almera floor tunnel)
Removing the instrument panel (article - Removing the dashboard of a Nissan Almera car)
In the car, use the Torx T-20 key to unscrew the two screws securing the mounting block
Remove the fuse mounting block and leave it hanging on the wires
With a 10 head, unscrew the two nuts
Remove the lugs of the mass wires from the studs
With side cutters, we bite the clamp securing the wiring harness to the cross beam
Prying off with a screwdriver, remove the wire harness holder from the steering column bracket
We also remove five more wire harness holders from the cross beam
Remove the cross beam bracket (how to remove it is described in the article - Removing the heater elements of a Nissan Almera car)
Remove the tailgate glass heating relay from the holder on the cross member
Disconnect the wiring harness from the brake light switch
With a head of 13, unscrew the four bolts securing the steering column
Lower the steering column to the floor
By pressing the lock of the wire block, we disconnect the blocks of the heater fan wiring harness
Unscrew the nut with a 10 head
Remove the ground wire tip from the stud
Using a Torx T-20 wrench, unscrew the air duct fastening screw
And remove the left air duct
We also remove the right air duct
Using a Torx T-20 wrench, unscrew the two screws securing the heater to the transverse beam
With a 13 head, unscrew the two bolts securing the cross beam on the left side.
We also unscrew the two bolts of the cross beam on the right side
Removing the cross beam
Remove the upholstery from the bulkhead
In the engine compartment with a 10 head, unscrew the two bolts securing the air conditioning pipes to the gearbox
Disconnect the tubes from the reducer
Squeezing the ends of the clamps with pliers, we move the clamps along the hoses
Disconnect the heater inlet and outlet hoses from the heater radiator tubes
Removing the heater from the car
Install the heater in reverse order.