I have a 2006 Accord 4-door that's been having issues with the blower fan not working. I tried replacing the power transistor with a brand new one from the dealership, and the fan worked fine when I plugged it in and started the car, but then it died about 4-5 minutes later.

Turning the car off and on didn't help, and I can't get it to blow air again. Is this an issue with the actual blower, or should I be looking somewhere else before I buy a new blower?

 

See this other thread to test the blower motor:

https://www.hondaaccordforum.com/for...accords-59744/

It will rule out the blower motor being the problem if it runs.

 

I attached a wire between the blue/black and black cavities on the connector that plugs into the transistor, and the fan did run. I also ran an HVAC code test from here https://www.hondaaccordforum.com/for...94/#post370304 and got code N, which apparently indicates a problem with the blower motor circuit. Where do I go from here?

 

Some change the transistor without checking it other like myself just change the whole thing to be done with it.

Check to make sure there are no loose connections or for oxidation. I'm sure it may be a bad motor itself but go though the checks. Do you know how to check for power to the pins?

Like I said previously I would just change the motor

 

The transistor has a thermal fuse soldered into the circuit board that will blow when the transistor gets too hot. You can check if you blew the fuse if you have a volt meter. The pins on the transistor that have the blu/blk and the blu/red wire should not be a closed and not open circuit.

The only thing that can cause the transistor to overheat is some kind of short in the blower motor. You may want to pull the blower motor and see if there is an obvious short in the wiring.

I recommend using an OEM Honda part, because I used an aftermarket motor when I had to splice in the wires, and the blower never worked like the original. I spend the extra money for an OEM part and it worked much better.

If money is an issue, you may want to find a u-pull-it junkyard for a used blower motor, because I haven't read about too many blower motor failures on this site.

 

I pulled the two-pin connector to the motor, and that is showing 12 volts across the two pins when the car is on. Is there another place I should be checking for power? What about checking for a proper ground?