I have a 2006 Honda Accord and the AC is intermittent.

I Was driving this morning with moderate speed AC, and it stopped blowing for a couple minutes. Then it came back on for 30 seconds or so, then stopped. It did this a few more times, then never came back on.

When I say stopped, here's what I mean. The air stopped blowing. It was still cooling, I turned the recirculator (?) to blow from the outside. It wasn't blowing, but you still get the cool breeze from outside.

It's got to be something with the blower, right?

EDIT - Tried replacing the relay for the blower. Still nothing.

 

It could blower or blower power transistor (reduces voltage to lower speed). Usually power transistor develops a permanent short or open fault, but an intermittent fault may be possible also.

Suggest following test when blower quits again. Thump the blower housing (under glove box) firmly w/ hand. If blower immediately restarts, the problem is worn blower motor brushes (loose contact). New motor is fix.

good luck

 

Thanks for the info. Unfortunately, it did not restart. Does that mean it's the transistor, or could it still be the blower itself?

 

The test is not definitive, as a false negative is likely. You need to thump several times vigorously. Make sure fan is commanded On.

As I said it could be the power transistor, but I would try a bit w/ the thump test to be sure.

I re-read your post and it appears the blower is permanent Off? If that is true, and repeated thumps don't bring it to life, time for a power transistor. There are other tests to confirm power transistor but they require a Volt-Ohm-Meter and some experience w/ electrical testing.

good luck

 

Alright, so here's what we've done. Tried testing some relays, no change. Went underneath the glove box and made sure the relay there was good. It is. The transistor has continuity. We sent 12V directly to the motor and it spun.

To me that means everything from the relays to the motor is working. Could it be something in the console? Or is there something else I've missed in my testing?

 

When you sent 12V to the blower motor, did you supply a ground as well to the motor?

You haven't determined if the problem is the power or ground side of the blower motor circuit.

The white/blue wire will always have 12V at the blower motor electrical connector when the key is turned to the II position.

The blue/black wire is the ground side of the blower motor. The resistance changes on the ground side because of the transistor.

Verify you have 12V to the wht/blu wire. Use a bare metal bolt nearby as your ground point.