Hello
I have a ml350 4matic 2009 with 55k miles.
The ac has been acting up since last year sporadically. The fan blows but do not blow out cold air. I turning off the car and start again, sometimes it would work again. I read from forum that turning it off ac button for 15 min and turn it back on to allow ice to melt and this method works sometimes. Sometimes i leave it alone and it would start working in 20 min. Eventually it will start working after driving for may be 15 or 20 min based on my observation. During the time that it is NOT working - when i leave the setting to "AUTO" i can hear the Fan blows stronger for 20 seconds, then it blows weaker for 30 seconds, and then blows stronger for another minute.... and from time to time, it just blows the air weaker. I am not sure if this is an indication of something else is wrong.
I have question on following.
1. I saw people mentioning ac fan, is this the same as the big radiator fan right behind the grill? Because that fan does run even with no cold ac air.
2. How do I chk freon level to make sure I have enough freon? I somehow don't think this is the reason but I want to rule it out.
3. About looking at the center but on the compressor - is it expected to turn the moment ac button in dashboard is pressed? I need to check this nut to see if it turns.
4. Anyone from nyc bayside area know of a reputable indy shop around?
5. When some post says, ice is forming inside the condensor, and it needs to be melt before ac to wotk, is this ice formation expected or the problem is it is forming ice blocking certain path? Where can I see or feel there are really ice in the car?
Thanks.
I have a ml350 4matic 2009 with 55k miles.
The ac has been acting up since last year sporadically. The fan blows but do not blow out cold air. I turning off the car and start again, sometimes it would work again. I read from forum that turning it off ac button for 15 min and turn it back on to allow ice to melt and this method works sometimes. Sometimes i leave it alone and it would start working in 20 min. Eventually it will start working after driving for may be 15 or 20 min based on my observation. During the time that it is NOT working - when i leave the setting to "AUTO" i can hear the Fan blows stronger for 20 seconds, then it blows weaker for 30 seconds, and then blows stronger for another minute.... and from time to time, it just blows the air weaker. I am not sure if this is an indication of something else is wrong.
I have question on following.
1. I saw people mentioning ac fan, is this the same as the big radiator fan right behind the grill? Because that fan does run even with no cold ac air.
2. How do I chk freon level to make sure I have enough freon? I somehow don't think this is the reason but I want to rule it out.
3. About looking at the center but on the compressor - is it expected to turn the moment ac button in dashboard is pressed? I need to check this nut to see if it turns.
4. Anyone from nyc bayside area know of a reputable indy shop around?
5. When some post says, ice is forming inside the condensor, and it needs to be melt before ac to wotk, is this ice formation expected or the problem is it is forming ice blocking certain path? Where can I see or feel there are really ice in the car?
Thanks.
