I have hit a dead end. My AC had inconsistent flow for a few days then stopped blowing altogether. The heater does not blow either. I have replace all the fuses, the blower motor and the 12v battery with no success. When I turn on the fan it moves about 1/4 inch and that’s it. Any idea on where to go next? thanks
Head to a junk yard and pull a fan... Of course maybe there's a fan relay that's failed? If it's a capacitor I would think that's probably built into fan, but have never taken one apart. Everything already vacumed out and cleaned?
There's no relay (except in trims with the solar ventilation option, which have the SPDT relay that switches the fan power between the solar panel and the 12V system). The blower you put in, where did that come from? Does it test ok on the bench?
Make sure your HVAC is clean and clear. Check your interior air filter and wiper cowl is clear. If your fan is not turning when activated, check connections and wire damage. Don't know if those has a ballast resistor, that sometimes opens up on other cars.
No Prius generation had a blower resistor. Gen 1 and gen 2 had a blower motor PWM controller that mounted separately in the air duct, the same way older cars' resistors would be mounted, leading some people to still call it a 'resistor'. Gen 3 moved that into the blower motor itself and doesn't have the separate unit.
First thing I would suspect is the replacement blower motor is bad. Unless it was new oem. I would check three fuses Then do an active test with Techstream if available Then check power and ground across the blower motor itself to ensure power and ground are good. A bad ground is just as bad as no power. Finally you need a scope or meter with graphing capabilities to check the SI pulse train input. If the replacement blower is not new Toyota oem from Toyota then my bet is it's bad.
The three fuses shown in the electrical schematic (first picture) shown in post #6 Posted via the PriusChat mobile app.
-2010 Gen 3, 269K mi. For last month or so, blower motor fan has stopped for 10 minutes or so 1x per week then comes back on. Controls on dash act totally normal. AC is cold when running (most of the time in Hawaii). -Yesterday stopped running at all. Power at fan plug. Got a new motor (non-oem), installed, not working, exchanged it, 2nd one not working. -what should be my next step? mahalo! PEH
Thank you! -Techstream only available at dealer -I can’t read diagram, which fuse numbers should I check? (Working on phone) -tried 2 non-oem motors today. I’m afraid to check the oem price! But will as a last resort… PEH
