Draft/Inducer Motor Help Please
I live in Lexington, Ky and the forecasted high temp for tommorrow is 42 degrees.......My furnace (Coleman Evcon) 3 years old, would not come on. T-stat would call for heat but Inducer Motor would not spin so I figured it was seized.
I removed the motor and found out it was not seized it was stuck due to a split (read as broken) o-ring or seal that was on the output shaft. I'm supposing this o-ring seals the inducer blower wheel from pulling air in from around the shaft thus reducing vacuum pressure. It is white and conical shaped and about 1/8" thick. I removed the complete inducer assembly and checked the blower wheel and the housing for damage and found none. I connected my shop vac to intake and exhaust vents and blew them from the furnace to outside to clear any possible blockages. I removed all the condensate lines and checked the condensate pump, all were fine. The pressure switch will operate with very little suction. I replaced everything i removed with the exception of the O-ring that i mentioned and can get the furnace to ignite by jumpering around pressure switch or by inducing vacuum by sucking on the house. I don't have a way of measuring the vacuum but i'm certain this o-ring is the issue. I see no reason to call a repairman or to replace the motor or the complete inducer assembly so my question is can i buy a replacement O-ring (IF SO then WHERE?) or use rtv or something else?
edit ***This is a Fasco Motor as well as a Fasco inducer assembly.
Last edited by Mainiack; 11-15-2008 at 09:39 AM.
Reason: added info for motor and assembly