Tempstar 80% 14yr old blower problem
Sounds like your motor is going. Has 3 or 4 windings. The heating one may be faulty. Turning the fan to ON may energize the cooling speed. When the heat cuts in the board stops the fan to allow the heat ex to warm up. Check the heating speed wire connection at the board. May be loose and need a new stakon. 14 yrs is average for any motor. Try using a different speed wire on the heat terminal temporarily to see if the problem goes away. If it does then I am right.
"Cut it twice and it is still too short".
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Last edited by yuri; 02-28-2010 at 12:44 PM.