407 SW Air Conditioning problem

[mejt1987]

Hi all, if someone could maybe give me some recomendations what to check

I have 2005 peugeot 407sw, i bought it 2 years ago and climate control was not working whole time, now i got Diagbox and i checked today status of sensors etc, ataching picture....so it says all requests are inactive, but on driver and passanger request its fully cold, its like its not sending signall at all to compresor to activate and cool. what should i check?

[GiveMeABreak]

Most of those options in the second picture are the status of the A/C control settings for the actual buttons.

Example, according to the above it is telling you that (1) the AUTO is not activated, (2) the air recirculation button is not activated.

If you press the blower speed button to increase the speed whilst Diagbox is connected, it will change on the display as you press the buttons....

This is just to test that the climate control unit to see if it is registering the button presses, nothing else and to tell you what the setting of some controls are set at.

It is not telling you anything about the A/C system!

If you have no air conditioning - you need to get it to an A/C specialist to undertake a pressure test / gas leak test. They check the system for leaks using a dye and a sniffer. If there are no leaks and it holds pressure, then you have another issue, that may be the actual compressor itself or the control of the compressor depending if it has a clutch or not, or an electrical issue. The compressor is automatically disengaged if there is low pressure in the system to prevent damage.

[mejt1987]

Most of those options in the second picture are the status of the A/C control settings for the actual buttons.

Example, according to the above it is telling you that (1) the AUTO is not activated, (2) the air recirculation button is not activated.

If you press the blower speed button to increase the speed whilst Diagbox is connected, it will change on the display as you press the buttons....

This is just to test that the climate control unit to see if it is registering the button presses, nothing else and to tell you what the setting of some controls are set at.

It is not telling you anything about the A/C system!

If you have no air conditioning - you need to get it to an A/C specialist to undertake a pressure test / gas leak test. They check the system for leaks using a dye and a sniffer. If there are no leaks and it holds pressure, then you have another issue, that may be the actual compressor itself or the control of the compressor depending if it has a clutch or not, or an electrical issue. The compressor is automatically disengaged if there is low pressure in the system to prevent damage.

Wait, so car was in automatic mode, and i activated deactivater recirculation buton but nothing changed in diag, is it posible that controls are busted, how could i test that, becouse when i put in auto it starts blowing air at higher speed and orange light on auto is active... In diag picture it says driver and pasanger request fully cold, and first row it says air conditioning AC request inactive...

[GiveMeABreak]

To test the actual responses to the controls (button pushes and adjustment dials), you would need to do a global diagnostic, then after that has completes, select the A/C climate control ECU from the list of ECUs displayed after the diagnostic completes.

Select the CLimate Control ECU and confirm, which should take you to another set of menus. Then select 'Parameters' or similar, then you may have standard parameters or custom parameters that you can select. You should find one there that will allow you to test the button pushes and controls, where Diagbox will show if the climate control ECU is detecting the presses or adjustments as you make them.

I can't be specific on a Forum as you can appreciate and menus will differ from version to version of Diagbox - so this is from memory. I don't currently use DB V9 as I need to replace my laptop for VM compatibility, which I have no need to do at present.

[mejt1987]

I understand fully, im going rn to test it, would be nice to fix climate control in this old car, becouse it works and goes great but had some electric glitches in this 2 yearss, and for 2 years from day one i bought it , climate was not working....till i test it if you could ansver me if you know, is there some relay and where is it located that controls compresor clutch, becouse i would to test it with multimeter, may hapen its dead and diagnostic is not reading it at all as its mechanicly controled...

[GiveMeABreak]

I'll need your VIN, as diagrams are specific to vehicle, build date and options. (please post your VIN in full without spaces - it will be automatically masked from public view after submitting your post & will only be visible to staff).