Peugeot Re: Re: '92 SW8 Intermittent Heat

From: Martin Karo (mhkaro@prodigy.net)
Date: Mon 25 Feb 2002 - 21:48:50 EST

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    If you ever solve the problem let me know how you did it. I've been
    wrestling with the same problem all winter. Replacing the ECU solved it for
    a few weeks. But it came back.

    I unplugged the electrovalve connector, to at least get full heat; you can
    bleed in cold air via one source or another. But you can't turn the heat
    off completely on a hot day.

    Marty
    '91 505 SW8

    ----- Original Message -----
    From: "jsgrubbs2001" <jsgrubbs@hotmail.com>
    To: <peugeot-L@yahoogroups.com>
    Sent: Saturday, February 23, 2002 9:08 PM
    Subject: Re: '92 SW8 Intermittent Heat

    > The HVAC ECU controls all that stuff--located behind glove box (to
    > the right of the injection ECU). For reference, I think there's a
    > relay bolted down to one of the ECU's mounting bolts.
    >
    > The HVAC ECU has measures the temperature of the heater core,
    > evaporator, outside air (cowl), and passenger cabin. It uses this
    > plethora of data to control the coolant valve and A/C compressor.
    >
    > By federal law, the "default" mode must be full heat and windshield
    > defrost... I would think that disconnecting the coolant valve would
    > result in full heat.
    >
    > -Joe G
    >
    >
    >
    > --- In peugeot-L@y..., "fwbillb" <fwbillb@a...> wrote:
    > > Hello,
    > > My wagon has been getting intermittent heat, particularly when the
    > > weather isn't that cold. The valve is open (heat is on) with no
    > > voltage to the switch (wire disconnected). I was told that in case
    > of
    > > a malfunction, the default setting is heat on, but what's happening
    > > now disproves that.
    > > I switched the dashboard control: no effect. Is there a heater ECU?
    > > Somehow the valve is getting voltage. Could it be the ambient
    > > temperature sensor on the dash?
    > > Naturally, thanks for any suggestions or further info.
    > > Bill
    >
    >
    >
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