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#1
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Aux fan turns on at normal operating temp.
Noticed that the aux fans of my 1990 300SE turn on when the engine is at normal operating temperature of 80*C with no AC. This happened in the last three days, any suggestions of what could cause this? Now that I think of it, it started doing this after I ran the AC for the first time since the summer.
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1979 Black on Black, 300CD (sold), 1990 Black 300SE, Silver 1989 Volvo 780, 1988 300CE (vanished by the hands of a girlfriend), 1992 300CE (Rescue). Last edited by Jorn; 04-24-2020 at 06:31 PM. |
#2
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Dirty and/or loose connection at the temp sensor or a bad sensor. As resistance goes up the fan comes on at a lower temps.
Good luck!!!
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"Rudeness is a weak man's imitation of strength" - Eric Hoffer |
#3
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Thanks, will check!
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1979 Black on Black, 300CD (sold), 1990 Black 300SE, Silver 1989 Volvo 780, 1988 300CE (vanished by the hands of a girlfriend), 1992 300CE (Rescue). |
#4
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Quote:
Do they come on at high fan speed or low fan speed? if at low speed then check the switch on the a/c receiver drier (when it's closed the fans run, there are 2 sensors only one does fans) if at high speed then check the sensor on the cylinder head |
#5
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Quote:
What color is your 300SE?
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1979 Black on Black, 300CD (sold), 1990 Black 300SE, Silver 1989 Volvo 780, 1988 300CE (vanished by the hands of a girlfriend), 1992 300CE (Rescue). |
#6
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441 Desert Taupe I really liked the black on black combo I found but it had 250k and needed a tranny. But the interior was like new |
#7
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That's a nice color. Wanted a black on black W126 as well, just like my old 300CD. But I'm very happy with my grey interior, it's a little dull but makes the interior more spacious feeling and cleaner.
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1979 Black on Black, 300CD (sold), 1990 Black 300SE, Silver 1989 Volvo 780, 1988 300CE (vanished by the hands of a girlfriend), 1992 300CE (Rescue). |
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