domcon7

A 2000 E320-w210. It seems to run early in the morning, but not in the afternoon when it's hot.
Readings- first one i the afternoon.
Second set in the morning.

First set
1-82
2-82
3-100
4-100
5-93
6-145
7-10
8-114
Second set
1-72
2-72
3-42
4-42
5-35
6-105
7-10
8-103
Error codes are always

B1234 -sun sensor
B1416- Engine coolant pump


My first thought is to replace the coolant pump, but the A/C works with the error.
The temperature sensors values varies.
If that's the problem, how are they corrected?
Any thought?
thanks

Plutoe

The good news is that it dosen't matter if it's AM, PM or BS time you have loads of issues. The big issue is number 7 at 10 and 8 at 114/103.

7 should be 15 and 8 should be 135.

Ok why, on earth only two things could be wrong to get 10, either you have a faulty compresor or you have a leak and do not have the required amount of refrigerant in the system to get 15.

Forget about the coolant pump that circulates hot coolant for the RIC heat function(see owners manual)

What do I do next--take the car to an AC shop have them put some gauges on the system and confirm either bad compressor or low refrig!!

domcon7

Thanks you just saved me lot of needless expense.
A/C shop next week