I need help troubleshooting my climate control. 1999 w210 turbodiesel.

I have the dreaded "EC" light always on.

I pulled the 1-8 codes and found that code #7 reads a value of "07" while code #8 reads "80".

The system has over 100# static pressure.

I speculate that #7 and #8 are the left and right side temperature?

After I pulled the codes I reset the climate control. The EC light now stays off but the compressor still doesn't cycle. I speculate that the "EC" light will come back.

Can anyone help with the codes?

__________________
85 300sd 400k
99 e300td 101k (hers)
34' californian twin 5.9 cummins
1999 F350 Powerjoke 75k
2001 F150 Supercrew 51k
19681/2 GT/CS

So I found a chart with the 1-8 codes;

http://continentalimports.com/ser_ic40142a.html

Also 07 bar is 101 psi so the sensor is NOT bad. I guess I'm back to square one.

__________________
85 300sd 400k
99 e300td 101k (hers)
34' californian twin 5.9 cummins
1999 F350 Powerjoke 75k
2001 F150 Supercrew 51k
19681/2 GT/CS

As I remember, the constant EC light is a "self defense" move by the computer in the event of low system pressures.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250

I speculate that most a/c system failures will result in the EC light coming on and my system has not lost pressure. I'm going to check the fuse in the clutch next.

__________________
85 300sd 400k
99 e300td 101k (hers)
34' californian twin 5.9 cummins
1999 F350 Powerjoke 75k
2001 F150 Supercrew 51k
19681/2 GT/CS

So what are the values for 3, 4 and 5? I'm betting on you being low on refrigerant.

__________________
Len
'59 220S Cabriolet-SOLD and living happily in Malta
'83 240D 351,500 miles original owner-SOLD
'88 560SL 41,000 miles - totaled and parted out
https://sites.google.com/site/mercedesstuff/home
'99 E300 turbo 227,500 miles
'03 SLK320 40,000 miles - gave to my daughter
'14 Smart electric coupe 28,500 miles
'14 Smart electric cabriolet 28,500 miles
'15 Smart electric coupe 28,000 miles

1=98
2=82
3=94
4=94
5=91
6=172
7=07 (101psi)
8=100

I verified the static pressure is over 100psi at the service port

__________________
85 300sd 400k
99 e300td 101k (hers)
34' californian twin 5.9 cummins
1999 F350 Powerjoke 75k
2001 F150 Supercrew 51k
19681/2 GT/CS

Were those numbers with the car and the AC system having had a chance to warm up? I'm still betting on low refrigerant level.

__________________
Len
'59 220S Cabriolet-SOLD and living happily in Malta
'83 240D 351,500 miles original owner-SOLD
'88 560SL 41,000 miles - totaled and parted out
https://sites.google.com/site/mercedesstuff/home
'99 E300 turbo 227,500 miles
'03 SLK320 40,000 miles - gave to my daughter
'14 Smart electric coupe 28,500 miles
'14 Smart electric cabriolet 28,500 miles
'15 Smart electric coupe 28,000 miles

The compressor won't start at all. Those numbers are with the car running but no compressor. As I've stated; the static pressure in the system is 100 psi so the compressor should be trying to start even if it were low on charge.

__________________
85 300sd 400k
99 e300td 101k (hers)
34' californian twin 5.9 cummins
1999 F350 Powerjoke 75k
2001 F150 Supercrew 51k
19681/2 GT/CS