I've got an '07 Fit. The heater and A/C are still working and the blower seems to work on daily commutes. But when I go on long trips (mostly on hot days using A/C) the fan stops working or at least works really poorly. I've managed to get it to start again if I turn it off for a while or turn the car off. But then I've had it fail multiple times on really hot trips. Just when the A/C's really wanted!

I'm wondering whether it would be the blower itself or an issue with the control circuit. It can't be diagnosed at the dealership unless it's not working at the time, apparently. I've never managed to have it fail when around the dealership.

Any ideas?

Thanks.

 

i have that too

 

The A/C evaporator is likely freezing up. For some reason my car will do this if the humidity is right and the HVAC is on vent+floor or floor. It'll never freeze on dash vent only or either defrost position even if I have the temp mod button in.

To get it to work, turn off AC (take off defrost or def+floor if you haven't done the disconnect mod) and turn the fan up for about 5 minutes. It'll melt the ice that's cutting off the airflow. Turn the unit to recirculate to limit humidity coming in to form more ice, turn to vent only, and you should be good to go.

Possible causes include a clogged up cabin filter, faulty evap thermistor, or just plumb high humidity causing icing away from the thermistor position before it can shut down the system.

Remember this could be a real problem if you miss it, as the evaporator is what causes gaseous refrigerant to be formed from the liquid so the compressor can push it through; if liquid refrigerant gets past the evaporator because no air is warming it, the compressor could potentially hydrolock.

 

It sounds kind of like what mine was doing on a long hot trip last summer. It ended up being a plugged up cabin filter. I mean really plugged up.