[chricol]

Does anyone know where is the fuse for the Auxiliary Interior Heater that is fitted on the 2.0 Diesel Version? I have a feeling that mine is not switching off.


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[Cuore_Sportivo_155]

at 900 watts or 60+ amps current draw, you shouldn't need to guess..

 

[chricol]

Cannot find it in the owner's manual and I thought I'd ask before taking stuff apart.. Do you know the location?


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[Cuore_Sportivo_155]

no, but it's going to be a BIG fuse so likely on the battery or in the motor compartment.

Mine doesn't have the heater.

I'll look in the wiring diagrams.

 

[chricol]

Thanks mate.. I also need to temporarily bypass heater matrix after trying this. Hopefully I will get to the bottom of the climate control malfunction I am experiencing


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[chricol]

These are the fuses in the engine bay fuse box.. Maybe there is one you don't have




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[Cuore_Sportivo_155]

ADDITIONAL HEATER - DESCRIPTION
Vehicle climate control via the heater unit is insufficient when the engine is cold.
On these versions there is also an additional heating system which is activated when the engine is first running, depending on the temperature of the engine coolant.
The system consists of an additional heating device, located inside the heater unit: this device contains two resistances (PTC1 - 250 W and PTC2 - 500 W).
The operation of the resistances is controlled by the climate control system control unit which operates either only one of them or both thereby providing gradual heating with a
maximum power of 750 W according to a control logic that depends on:
- the outside temperature (below 20°C)
- the temperature of the engine coolant (about 70°C);
- the engine speed (which should be above 700 rpm);
- the battery voltage (which should not drop below 12.6 V).
For more details
See descriptions 5040 AIR CONDITIONING CASING AND COMPONENTS
The power supply for one, two or three resistances is operated by means of two relays located on the heater unit itself:
- 1. Level: activated by the first relay switch (250W);
- 2. Level: activated by the second relay switch (500W);
- 3. Level: activated by both relay switches (750W)
The power supply line is protected by two fuses in the engine compartment fuse box.

F05 and F82

 

[Cuore_Sportivo_155]

so the heater works if it's under 20°c outside and the engine temp is below 70°c + the engine is running

 

[Cuore_Sportivo_155]

the top right 50A fuse is F82, the 4th fuse in the center (above the relay) is F05.

 

[Cuore_Sportivo_155]

Thanks mate.. I also need to temporarily bypass heater matrix after trying this. Hopefully I will get to the bottom of the climate control malfunction I am experiencing


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what are the symptoms?

 

[chricol]

Does it mention which is the relay? Just removed f05 (40A) and will take it for a spin later on to check what happens.


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[chricol]

Removed both..


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[chricol]

what are the symptoms?

http://www.alfaowner.com/Forum/showthread.php?t=841298. << this is still happening


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[Cuore_Sportivo_155]

the relays are on the heater unit as far as I can see, certainly after the heater unit connector.

Had a look at the other thread.

I would suspect the axle for the passenger side flap (with the always hot air) is broken, so the motor can sit anyway it wants, the flap never closes off the hot air...

If you can remove the motor for the temp control and set the flap manually closed. See if that does anything at all. If not you know where the problem sits, unfortunately...

 

[chricol]

Just got this from MES




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[chricol]

Reuploaded in better quality


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[chricol]

I suppose dash is coming out soon :'(


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[Cuore_Sportivo_155]

check the wiring towards the motor is not chafing before taking out the dash.

 

[chricol]

I will.. Just downloaded latest release of mes as it includes some other functions for climate control dtc, whatever that is..


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[Cuore_Sportivo_155]

dtc= diagnostic trouble code