On Sat, 30 Dec 2006 18:27:59 -0500, GraemJohn wrote:
When was the last time you flushed/filled the cooling system?
If it hasn't been for a while, I would take it to a decent garage/mechanic
that has a REAL power flush machine and blow it out. You've probably got
gunk 'circulating' in the cooling system and blocking the heater core
(this is just a guess, BTW, based on 'experience'...)
A partly plugged heater core can cause driver shivers at very cold
outside air temps yet seem to work OK at more moderate temps. Or could
be one of the climate system doors not working or a bad heater control
valve. Have someone flush the coolant system including the heater
core, then go from there.
I had an 89 Camry, simalar problem, my Toyota service
manager (the Dealership owners son) said the cause was
likely the resistor element on the temperature slider lever.
He suggested sliding the heat control all the way to hot and
then back slightly to use a different part of the resistor
element, OR he could order a new part for near $300 bucks. I
chose the less costly option and it worked for more than a
couple of years. He told me the heater control is almost all
electronic, this was an LE with the push button controls.
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