hi i have a 2004 uk 2.0 petrol accord
the blower motor stopped working so i changed the resistor. it was a used one from car of same year but it only lasted 1 day before it stoped working again.does anyone know of a reason why my car is blowing the resistors

 

I have not read of any confirmed reason for these failures of the power transistor (a variable resistance).

However, on my 2003 MDX that has similar fan controls, the reason for rear blower power transistor failure is lack of air flow from the air intake. Intake screen gets blocked w/ dust/fuzz from the car interior, overheats, and blows the thermal fuse that is designed to protect against overheating. BTW, the thermal fuse can be replaced if you're handy w/ a soldering iron and can source the correct thermal fuse. Let me know if you're interested and I'll supply some links for the thermal fuse source.

I suspect that failure in the Accords of the power transistor might occur with reduced air flow at low fan speeds (max transistor resistance/heating condition) due to a dirty cabin air filter. You might try replacing this filter before next transistor installation.

good luck

 

thanks will check the filter