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:
- it is necessary to release the refrigerant through the valve 1 of the low-pressure pipeline and the valve 2 of the high-pressure pipeline.
- to release the refrigerant, unscrew the protective caps of the valves and apply pressure on the valve rods with a suitable tool.
It is necessary to release the refrigerant in a thin stream.
When the refrigerant is drained, it is possible to spray a certain amount of oil mixed with it.
If it is necessary to replace the valve, we turn it out of the pipe fitting with a key similar to the metal cap of the wheel valve
Removing the valve
Drain the liquid from the engine cooling system (article - Checking and replacing the Nissan Almera engine coolant)
We remove the air intake with the resonator assembly (article - Replacement of 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 dashboard (article - Removing the dashboard of a Nissan Almera car)
In the car with the Torx T-20 key, we unscrew two self-tapping screws of the mounting block
We remove the fuse mounting block and leave it hanging on the wires
Unscrew two nuts with the head by 10
We remove the tips of the mass wires from the studs
With side cutters, we bite the clamp of fastening the wiring harness to the cross beam
Using a screwdriver, we remove the wiring harness holder from the steering column bracket
We also remove five more wire harness holders from the crossbeam
We remove the crossbeam bracket (as described in the article - Removing the elements of the Nissan Almera car heater)
We remove the relay for heating the glass of the luggage compartment door from the holder on the cross beam
Disconnect the wiring block from the brake signal switch
With the head on 13, unscrew the four bolts of the steering column mounting
Lowering the steering column to the floor
By pressing on the lock of the wiring harness, disconnect the pads of the heater fan wiring harness
Unscrew the nut by 10 with the head
We remove the tip of the mass wire from the stud
With the Torx T-20 key, unscrew the air duct mounting screw
And remove the left air duct
Also remove the right air duct
With the Torx T-20 key, unscrew the two screws securing the heater to the cross beam
With the head on 13, unscrew the two bolts securing the cross beam on the left side.
Also unscrew the two bolts securing the crossbeam on the right side
Removing the cross beam
We remove the upholstery from the front panel
In the engine compartment, unscrew the two bolts of fastening the air conditioner tubes to the gearbox with the head by 10
Disconnect the tubes from the gearbox
Having squeezed the ends of the clamps with pliers, we shift the clamps along the hoses
Disconnect the inlet and outlet hoses of the heater from the radiator tubes of the heater
Removing the heater from the car interior
We install the heater in the reverse order.