heater fan direction

["Hal Faulkner" <hal@katemuir.com>]

Spridgeteers,

Having converted FROG AYE to negative earth, I am told that my heater blower
will now draw cool air from the cockpit and exhaust heated air through the
grill (well maybe not quite, but you get the idea.)  Before I disassemble
the heater, is there anything I need to know about reversing the polarity of
the blower motor?  Is it possible?

Hal