There is no provision to shut off the air flow from the heater. all you
can do is try to eliminate any coolant floe through the heater core so
the incoming air is not heated
Doug Leithauser
>James Pickard wrote:
>
>> Now that I've plugged all the holes in the firewall with grommets,
the heat
>> pouring into the cockpit is much reduced. Now the biggest remaining
source
>> is a mild flow of warm air from the heater. I have the heater
controls
>> turned off, but air flows in anyway. Again I'll ask my usual dumb
>> question, is this normal? If not, what do I need to do? If it is
normal,
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