shaneg

Hi guys have a 2007 w216 cl500 and the cooling fan comes on at full speed after 10 min of driving , thought it might be something small at 1st but no faults on any system , coolant temp sensor is working on live data and voltage is changing with temp , then checked a/c system to find pressures to be low , replaced a/c pressure sensor and a/c pump unit and re gas with the correct amount of gas , but no change still think its a/c pressure issue as I'm only getting about 8 bar when a/c is on and ideas ?

Plutoe

If you only have 8 bar you have a faulty compressor----to confirm use gauges to determine the H and L pressures and adjust accordingly.

shaneg

Thanks for reply Yes maybe , I had only around 7 bar , but after replacing the a/c compressor with a new unit from mercedes i now have a little over 8 , it could also be a blockage in condenser or accumulator but very hard to find out where the problem is