because the problem is not the thermostat. On this one, the radiator is
blocked by a shroud, except for where the 2 fans are. I'm guessing that
is to keep bugs out of the radiator. So without the fans running, it
runs too hot. when the fans run it is fine. Larry put a new
thermostat in it not that long ago. If I had evidence of a thermostat
problem I would change it. so far it is quite clear: Fans running, no
overheat. Fans not running, overheating. With the sensor on top of
the engine plugged in, the fans never run. THat is a problem. When
that sensor is unplugged, the fans are intermittent.
If the R134a has leaked out, would the low pressure switch cause the
fans not to run? Seems to me that the fans should be independent of
the a/c, but obviously they are linked at the drier. Fans should run
when the A/c is off.
Meade Dillon via Mercedes wrote on 3/13/20 8:22 PM:
Why don't you replace the thermostat?
If you dig into the FSM for the HVAC system, it will have the test
procedures for both low and high cooling fan operation. Section 83 I
believe.
-------------
Max
Charleston SC
_______________________________________
http://www.okiebenz.com
To search list archives http://www.okiebenz.com/archive/
To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
