[urq] odd temp behavior

[Mike Sylvester]

I'll have to verify if the high temp reading is linked with the blower
motor speed or the heater temp selection.
If it were the blower motor speed I would have also seen this behavior
in the summer, but the possibility of a bad ground can't be overlooked
in these cars.

The temp it doesn't jump around right away when the blower is turned on
or off.
When it is hot and I turn off the blower and change the heat setting ,
it takes about 5 minutes for the engine temp reading to come back down.

Mike



> -------- Original Message --------
> Subject: Re: [urq] odd temp behavior
> From: "Steve Buchholz" <urq at pacbell.net>
> Date: Tue, February 28, 2012 10:36 am
> To: "Mike Sylvester" <mike at urq20v.com>,  "urq Audifans"
> <urq at audifans.com>
> 
> 
> By any chance were you running the interior blower at the same time? IME the ground current from the blower causes a voltage drop in the gauge's ground which causes erroneous readings.
> 
> Steve Buchholz (mobile)
> 
> ----- Reply message -----
> From: "Mike Sylvester" <mike at urq20v.com>
> Date: Tue, Feb 28, 2012 6:29 am
> Subject: [urq] odd temp behavior
> To: "urq Audifans" <urq at audifans.com>
> 
> With the mild weather we've had here in NE, I've driven the urq a few
> times.
> I've noticed that engine temperature has been abnormally high, which
> seemed odd since the outside air temp was in the 30's.
> 
> The strangest part is that the engine temp only goes high if I have the
> heat in the hot position.  If I move it to cold, the engine temp will
> drop back to normal after a few minutes.
> 
> This seems completely counter-intuitive.  How can allowing coolant to
> flow through the heater core cause the engine temp to rise?
> Is is as if it ceases to flow through the radiator when the heater valve
> is open.
> 
> 
> Mike
> 
> 
> 
> 
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