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Radiatorventilator slaat niet aan : Techniek W201

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Het is nu 29 maart 2024, 16:52

Radiatorventilator slaat niet aan

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Radiatorventilator slaat niet aan

Berichtdoor rvh70 » 18 jun 2017, 17:30

Ik ben tegen een probleem aangelopen in mijn W201. De ventilator van de radiator slaat niet goed aan. Als ik de temperatuur op laat lopen tot 100 graden gebeurt er nog steeds weinig. Ik vraag me af hoe ik kan testen wel onderdeel het is.

Ik heb begrepen dat hij op dezelfde zekering zit als de toerenteller, en die loopt prima. Desalniettemin zal ik die vanavond ook nog even checken.

De ventilator draait helemaal vrij (zowel bij warme als bij koude motor) en draait rustig door, als de motor aan staat. Als ik hem stilzet begint hij na verloop van tijd ook weer te draaien, dus de elektromagneet lijkt gewoon z'n werk te doen.

Dan is het dus, volgensmij, een sensor probleem. Waar kan ik deze vinden in de auto en hoe kan ik deze testen?
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Re: Radiatorventilator slaat niet aan

Berichtdoor W201Class » 18 jun 2017, 18:44

Vergissing die vele maken is dat de ventilator bij 100 graden zou moeten aanslaan, deze slaat bij 105 graden aan. Je zou de stekker los kunnen halen en doorverbinden. Slaat de ventilator aan, dan is het waarschijnlijk de sensor.


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Re: Radiatorventilator slaat niet aan

Berichtdoor MBSLC » 18 jun 2017, 19:50

Let op je vingers, als hij opeens aanslaat, heb je een probleem , als je net z'n vrijloop aan het controleren bent. :evil:
STERREN STRALEN AAN DE HEMEL, STERREN STRALEN OP DE WEG !
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Re: Radiatorventilator slaat niet aan

Berichtdoor Kennytuning » 18 jun 2017, 20:11

Daarom ook nooit met je vingers doen, maar met een stuk hout ofzo...
Je vingers zijn niet vervangbaar - een auto onderdeel wel ;)
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Re: Radiatorventilator slaat niet aan

Berichtdoor rvh70 » 19 jun 2017, 20:20

rvh70
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Re: Radiatorventilator slaat niet aan

Berichtdoor W201Class » 19 jun 2017, 21:00

Mooi!
Water kookt bij 100 graden. Omdat die temperatuur snel bereikt wordt zit er druk in het koelsysteem. Hoe warmer de motor, hoe meer druk. De hogere druk zorgt ervoor dat de kookpunt van water wordt verhoogd. Daarom moet je de dop van de reservoir nooit met een warme motor opendraaien. Door de druk in het systeem spuit het eruit en kun je jezelf verwonden.
De ventilator is de redmiddel om bij 105 graden de temperatuur te verlagen.


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Re: Radiatorventilator slaat niet aan

Berichtdoor RD500SEC » 19 jun 2017, 23:14

Als het goed is, zit er koelvloeistof in het koelsysteem, geen zuiver water.
Koelvloeistof heeft onder druk van 1,5 bar een kookpunt van 120 graden.
Laatst bijgewerkt door RD500SEC op 21 jun 2017, 15:21, in totaal 1 keer bewerkt.
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Re: Radiatorventilator slaat niet aan

Berichtdoor Prometheus » 20 jun 2017, 09:16

Koelvloeistof bestaat uit 51,5% (gedemineraliseerd) water, 46% glycerine of glycol en 2,5% additieven

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Re: Radiatorventilator slaat niet aan

Berichtdoor rvh70 » 22 jun 2017, 11:19

Koelvloeistof heeft de eigenschap dat het een lager vriespunt heeft, dat maakt rijden in de winter wel makkelijker :). Maar heeft het mengsel ook een hoger kookpunt? Of komt dat puur door de 1,5 bar die op het systeem staat?
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Re: Radiatorventilator slaat niet aan

Berichtdoor Prometheus » 22 jun 2017, 13:34

Voornamelijk door de druk. 1 bar druk verhoogd het kookpunt naar ong. 120. De ethyleenglycol verhoogd het kookpunt met slechts een graad of 5.
Hoe meer ethyleenglycol hoe lager het vriespunt (tot 70%) en hoger het kookpunt, echter gaat de warmtecapaciteit omlaag. Dus hoe meer ethyleenglycol hoe slechter de warmte afgevoerd kan worden. Blijkbaar is de 46% de optimale mix.

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