e class w211

tucker · 02-07-2009, 10:05 PM

can some one tell me where the radiator fan relay in located in this car e270 cdi fuse box l/h/s contains relays or some one mentioned to me about under the coolant tank r/h/s ( looks like lrg connector block ) main fan not kicking in and temps around 100 c which i think isnt right hence realy prob..... mb put on star and tested fan and was shown it working, how ever that was tech telling it to run via star diag...top radiator hose seems to build pressure the hotter coolant gets...

richard · 02-07-2009, 10:09 PM

If the tech could tell the radiator fan to work then the relay is fine (he told the SAM to turn on the fan which implicitly turns on the relay) - thus I would suspect the temperature sensor (which he should have been able to test with Star also)

R

tucker · 02-07-2009, 10:12 PM

sorry i know what ive asked may seen stupid but the fact fan dont come on at all worries me and only runs when heater on, ie runs low rpm... would star not have picked up temp sensor failure ???

tucker · 02-07-2009, 10:16 PM

i had also 4 pages of open circut faults to which he reset... cant help but worry about coolant temp and not seeing fan kick in to cool around 100 c

richard · 02-07-2009, 11:31 PM

Quote:

Originally Posted by tucker

sorry i know what ive asked may seen stupid but the fact fan dont come on at all worries me and only runs when heater on, ie runs low rpm... would star not have picked up temp sensor failure ???

Not if it wasnt open or short circuit (i.e just reading the wrong temperature) - or if its a fixed temperature switch (i.e isnt feeding back a temperature, just opeates at a given temperature.

Richard

timskemp · 02-07-2009, 11:49 PM

In the time I've had mine I can't remember the fan ever coming on unless the A/C is running and then as you say it's at a low speed.

02-07-2009, 10:05 PM	#1
tucker New Member Join Date: Jun 2009 Posts: 3	e class w211 can some one tell me where the radiator fan relay in located in this car e270 cdi fuse box l/h/s contains relays or some one mentioned to me about under the coolant tank r/h/s ( looks like lrg connector block ) main fan not kicking in and temps around 100 c which i think isnt right hence realy prob..... mb put on star and tested fan and was shown it working, how ever that was tech telling it to run via star diag...top radiator hose seems to build pressure the hotter coolant gets...

02-07-2009, 10:09 PM	#2
richard Hardcore MB Enthusiast Join Date: Jun 2002 Location: Berkshire, UK Car: 07 ML500, 04 SL55 Posts: 2,287	If the tech could tell the radiator fan to work then the relay is fine (he told the SAM to turn on the fan which implicitly turns on the relay) - thus I would suspect the temperature sensor (which he should have been able to test with Star also) R __________________ Of course i'll take it apart. Comand Online Ltd: We're listed on MBClub - please click to see our products and discounts available. Latest Mods: R230 Distronic. Next Mod: 04 SL NTG2.5 . . . Previous Mercs: W163 ML500, W169 A, R230 SL55, W163 ML430, W208 CLK55, R129 SL500, W208 CLK320, R170 SLK230, 1st Merc = R129 SL320.

02-07-2009, 10:12 PM	#3
tucker New Member Threadstarter Join Date: Jun 2009 Posts: 3	sorry i know what ive asked may seen stupid but the fact fan dont come on at all worries me and only runs when heater on, ie runs low rpm... would star not have picked up temp sensor failure ???

02-07-2009, 10:16 PM	#4
tucker New Member Threadstarter Join Date: Jun 2009 Posts: 3	i had also 4 pages of open circut faults to which he reset... cant help but worry about coolant temp and not seeing fan kick in to cool around 100 c

02-07-2009, 11:49 PM	#6
timskemp Hardcore MB Enthusiast Join Date: Dec 2006 Location: Hull Car: W211 E270CDI Posts: 1,939	In the time I've had mine I can't remember the fan ever coming on unless the A/C is running and then as you say it's at a low speed.

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