91 940 radiator fan does not start with A/C

Discussion in 'Volvo 940' started by Telespalla Bob, Jun 29, 2010.

  1. Hi, in my 1991 940 with B204E engine I have a problem with ECC A/C
    system that randomly do not start the front radiator fan.
    I checked the radiator fan relay by short-circuiting coolant temperature
    switch in the radiator, and fan start.
    I checked, in engine compartment, the connector between ECC unit and
    radiator fan relay, and it seems ok.
    All other function of ECC control unit works, but very rarely, and
    specially in winter, the A/C OFF button light flash, however is
    sufficient to switch off instrument cluster and re-turn it on and
    problem disappear.
    How I can check?

    Telespalla Bob, Jun 29, 2010
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