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Discussion Starter #1
I am looking for the wiring connectors to the oil pressure switch and air con compressor switch. Please does anyone have them or can advise where I could get them. Tried all local scrapers etc but no luck.
 

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These connectors are the same on many different models of peugeot and citroen so go back to the scrappy and look at ALL the peugeots not just 207s
 

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Discussion Starter #3
Hi reliable,

I managed to find a connector today and tested the clutch. The clutch engaged and plate was spinning etc. but still no cold air. Do you know where I should look next?

I do have 2 codes po597 and po598 relating to the thermostat, do you think this could be the problem and if so is there anyway to know without changing the whole housing?

Or could it be the compressor itself? Again is there anyway to test. I have added a pic of a grey switch/sensor on tg compressor, does anyone know what it is/does?

Thanks and sorry for all the questions!
 

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If the compressor is running you should get some sort of cooling provided a]the compressor is pumping, b]you have enough gas in the system, c]there is no blockage in the system.

With the compressor running, does one pipe get cold[ish] and the other hot[ish]?

Ideally you need to get the running pressures, both low and high, checked by someone experienced with vehicle a/c. They will tell what exactly is happening.
 

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Discussion Starter #5
Hi Will, i turned the fans to low while the clutch was running (from the alternate power supply) and left for a good 10 minutes but no cold air. Also none of the pipes were getting cold either.

I just have this hunch about the thermostat (due to fault codes) but don't know for sure as like you said in the other thread the systems are now quite complex and it's hard to know for sure. Worst thing is there doesn't seem to be any air con specialists round here and I've been to 3/4 garages and they don't want to know.
 

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last time i had this it was because the pump seals had gone dry so replaced pump.(could also hear it)

also have you had the system filled properly? as i once made the mistake of having the system filled by halfords (man with a big can), used only one port, no vacuum, and although it reached pressure initially it wouldnt engage the clutch.
 

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Discussion Starter #8
Well when I had the pressure read it came out high? But had a purge and regas and still nothing doing.
 

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It is sounding more and more like you have a blockage in the system. Unfortunately that is a job for a proper a/c person.
 

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Discussion Starter #10
Yes i agree. Might have to travel a bit further to someone who hopefully knows what they are doing. Getting fed up with the car now though, tonight the temp gauge issue returned, then the car would start was just turning over, then started and ran fine.

Just seem to be wasting time and money.
 

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Aircon

Hi, if you can defiantly hear a click from your AC Compressor clutch engaging on and off each time you press the AC Button inside the car then:
1. Open the bonnet and check the two aluminium lines going to the compressor for cold and hot, that means the AC Circuit is working, if this is the case:
2. Check your heater control flap the gear may be stripped, or actuator motor could be burned out.

If the AC clutch is working and it's not going cold try this:
1. Press the air valve that you use to top up the gas line for a split second ( use a Biro) and release some pressure, maybe 1 second or two is more than enough! ( make sure to wear eye and water proof hand protection as it's super cold gas and can harm you! Very badly)
2 . Check and see if it makes a difference
3. If it's still the same and you have checked the heater control valve you may need re gassing .
4. If small pressure is realised then you defiantly need gas topped up
Let us know how you go.
 

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Discussion Starter #13
Hi, if you can defiantly hear a click from your AC Compressor clutch engaging on and off each time you press the AC Button inside the car then:
1. Open the bonnet and check the two aluminium lines going to the compressor for cold and hot, that means the AC Circuit is working, if this is the case:
2. Check your heater control flap the gear may be stripped, or actuator motor could be burned out.

If the AC clutch is working and it's not going cold try this:
1. Press the air valve that you use to top up the gas line for a split second ( use a Biro) and release some pressure, maybe 1 second or two is more than enough! ( make sure to wear eye and water proof hand protection as it's super cold gas and can harm you! Very badly)
2 . Check and see if it makes a difference
3. If it's still the same and you have checked the heater control valve you may need re gassing .
4. If small pressure is realised then you defiantly need gas topped up
Let us know how you go.
Hi Harga thanks for replying.

-The AC clutch is not engaging when i press the AC button but it will engage if an alternate power supply is applied to it.

-None of the pipes are getting cold whatsoever.

-When i first had the AC checked the pressure was high, i had it fully purged and regassed but no change.

-You mentioned the heater control flap, what/where is this please? and what should i be looking for?

- Also i am getting a fault code relating to the thermostat, do you know if this would prevent the clutch from engaging/pipes from getting cold etc.

Thanks
 

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If the AC Clutch engages from an outside source then you defiantly have none or not enough gas, this is a fail safe so you don't seize the compressor motor.

Take the car to an Air Con specialist, they will add some green dye and re-gas the system & look for any leaks ( green dye leaking )

Its most probably an O-ring, so if you want replace the O-rings first before you get the system re-gassed.
 

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Discussion Starter #15
Hi Harga,

I did have the system purged and regassed and even immediately after the regas the clutch still did not engage? Therefore I dont think it's a leak but could something else be stopping it engaging? Also do you know if a permanently open (failed) thermostat would prevent the clutch engaging? Thanks
 

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Yes too high can also cause problems, did you check what pressure you have today? Look for a black plastic cap about 8mm in diameter it's similar process to letting air out of the tires,but beware gas is cold and can harm your skin of ts sensitive,
I would check first pressure
, if its not a lot then it must have leaked out leaving you with the problem I mentioned a few posts ago

Refer back to my first post and follow the steps carefully
 

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Discussion Starter #18
Yes too high can also cause problems, did you check what pressure you have today? Look for a black plastic cap about 8mm in diameter it's similar process to letting air out of the tires,but beware gas is cold and can harm your skin of ts sensitive,
I would check first pressure
, if its not a lot then it must have leaked out leaving you with the problem I mentioned a few posts ago

Refer back to my first post and follow the steps carefully
Hi Harga,

Thanks for the advice, i will give it a try on Saturday when i have some free time to have a proper look at it. Will keep you updated.
 

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In case anyone is reading this thread in 2020, sorry to add/bump to an old thread , but I had a car last moth with the same problem, it was the thermostat sender at the rear of the thermostat housing, it must work to complete the AC circuit for the Clutch actuator to work along with correct pressure in the AC lines.
Unfortunately the whole thermostat housing is needed to be replaced if this is the fault.
Easy way to diagnose it is, plug another working thermostat sender to the car before removing the original, it is the black sensor moulded to the rear of the housing.
it is not the Green one that you can remove at the top for the temperature gauge, or the one in front for the new style housings.
 
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