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Hi all merc lovers!
Bought mercedes e270 2004, super happy so far, however I have issue with AC system (bad timing as UK seems to having the best summer in the last 1000 years).
I checked fuses, all seems to be alright - however have not checked Relays. The fans are working fine and blows cold(cold only at night, during the summer hot day quite warm) and hot air if I change the temp control.
I bought R-134a gas and tried to add some into the system, however when I plugged in hose to check the pressure it showed me very high pressure and WARNING sign - which according to manufacture of the gas suggest it should be electrical fault and should not gas into the system to prevent it from further damage.
I tried to reset AC system as suggested by someone by pressing defrost and Re circulation.
Thanks for answer guys, still no luck for me.
I managed to check pressure in high and low systems and it looks like both pressures are the same around 50 psi, which I am sure indicates some issue.
I always try to avoid tapping into pressurized system as that has potential for opening additional problems.
But anyway, what you have measured is 50 psi = 3 bar of pressure.
That most likely is too low to activate the system. And again - without proper troubleshooting this is just educated guess.
You had small refrigerant leak, so my best advise is to put a can of R134 + dye in it.
That should restart the system and potentially let you pinpoint the leak.
DON'T put any other crap in the system!
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AC Off is on and flashing when pressed
