PeachParts Mercedes-Benz Forum - View Single Post - Poor AC Cooling at Low Engine Speed...Why?

JamesDean · #6 07-16-2012, 02:36 PM

Quote:

Originally Posted by Air&Road

There ARE things beyond the refrigeration section of the climate control system that can cause less than maximum a/c performance. Pods can go bad allowing outside air into the system, preventing maximum performance. Also heater valves can sometimes allow hot coolant through the heater core and it doesn't take much to compromise a/c effectiveness.

I know in my 420SEL I had to change the recirc door pods. That helped abit. Everything else in that car is good. I did add some R12 to the cars' charge and that really helped with performance around 100F ambient. It also seemed to stabilze the idle temp too. It has a new monovalve insert as well.

In the 190E I've not replaced any pods, I know my recirc still works. I do have less air coming out of my side vents than the center vents.. Not sure if thats just normal or..

The green 300SD needs a new defroster pod. Half of it died, taking out the center pod. I just bypassed that and shut the defroster pod for the summer. That probably should be replaced before winter hits.