Good day, I am having a very confusing problem with my MK4 golf TDI (AHF)
The problem is Air conditioning, I bought the car at an auction as a daily driver and as anticipated I wasn’t expecting all systems to be go, but you buy them "voetstoots".
Here is the conundrum. I wasn’t aware of how air conditioning works but All I know is if you put the blower on and press the AC button it will get cold on a hot summer’s day. Mine just blows hot air and that’s when I realized there was a problem, it is manual AC and not climatronic.
I started googling and I followed a few suggested remedies which all came back negative, they are.
1. when you start the car and you press the AC button it should light up and Both fans AC and radiator fan should start spinning at speed 1, Mine don’t spin in fact they never spin even after a 240km drive however there is never any overheating, the coolant temperature remains at 90 °C ,I am guessing the coolant temperature sensor is only triggered at 95 °C+ temperature to make the big fan spin. I did a jumper test on the fan connector using a jumper cable and they spin both at speed 1 and 2 both fans are working fine.
2. -Fuses- All fuses related to air-conditioning are in working order, all the fuses above the battery are working particularly fuse S164 40A & S180 30A, position 16 fuse in the cabin that is responsible for the AC clutch are all working.
3. The Fan control Module relay 1J0919506Q under the battery tray is in working condition it throws no error codes on the VAGcom I believe the module is J293, I can do an output test for the fans via VAG com and this I believe indicates the module is not faulty.
4. I thought it was the AC clutch was having a problem so I removed it and sent it in for repairs, they said they found the magnetic coil faulty and replaced it, when they sent it back because there was no freon in the system I took it into a AC garage to get some freon in the system but they said when they hooked the cylinders to the service ports and they set the AC blower to max and press the AC button there was no reaction from the compressor clutch to suck freon gas into the system, but when they jumped the connector on the AC pump the clutch engaged normally.
I have completely run out of ideas and diagnosis, maybe someone in the group has had the same problem and found a fix.
thanks
The problem is Air conditioning, I bought the car at an auction as a daily driver and as anticipated I wasn’t expecting all systems to be go, but you buy them "voetstoots".
Here is the conundrum. I wasn’t aware of how air conditioning works but All I know is if you put the blower on and press the AC button it will get cold on a hot summer’s day. Mine just blows hot air and that’s when I realized there was a problem, it is manual AC and not climatronic.
I started googling and I followed a few suggested remedies which all came back negative, they are.
1. when you start the car and you press the AC button it should light up and Both fans AC and radiator fan should start spinning at speed 1, Mine don’t spin in fact they never spin even after a 240km drive however there is never any overheating, the coolant temperature remains at 90 °C ,I am guessing the coolant temperature sensor is only triggered at 95 °C+ temperature to make the big fan spin. I did a jumper test on the fan connector using a jumper cable and they spin both at speed 1 and 2 both fans are working fine.
2. -Fuses- All fuses related to air-conditioning are in working order, all the fuses above the battery are working particularly fuse S164 40A & S180 30A, position 16 fuse in the cabin that is responsible for the AC clutch are all working.
3. The Fan control Module relay 1J0919506Q under the battery tray is in working condition it throws no error codes on the VAGcom I believe the module is J293, I can do an output test for the fans via VAG com and this I believe indicates the module is not faulty.
4. I thought it was the AC clutch was having a problem so I removed it and sent it in for repairs, they said they found the magnetic coil faulty and replaced it, when they sent it back because there was no freon in the system I took it into a AC garage to get some freon in the system but they said when they hooked the cylinders to the service ports and they set the AC blower to max and press the AC button there was no reaction from the compressor clutch to suck freon gas into the system, but when they jumped the connector on the AC pump the clutch engaged normally.
I have completely run out of ideas and diagnosis, maybe someone in the group has had the same problem and found a fix.
thanks
