|
08-08-2010, 07:28 PM | #1 |
I've made a post!
Drives: 2007 Yaris Join Date: Aug 2010
Location: miami
Posts: 1
|
A/C blower resistor
My a/c blower fan fluctuates at various times. Sometimes it does not turn on at all. When it does turn on it runs great and cold. I know that the a/c blower speed is controlled by the blower resistor through the fan speed switch. My loaded resistor voltage is 3.5v on 1, 5.2v on 2, 7.6v on 3, 12.1v on 4. My unloaded voltage is 14v. Is this correct or should the resistor be changed?
|
08-08-2010, 09:53 PM | #2 |
ULTIMATE
Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
|
Those sound about right. I haven't measured the voltage, but I have measured the resistance of the three taps on the resistor, which are 1.0, 2.0, and 4.0 ohms. The blower motor has a coil resistance of 5.4 ohms.
High completely bypasses the resistor, so if it sometimes doesn't work on high, then it's definitely not the resistor. I would check the contacts on the blower switch and also the HTR relay. |
Tags |
a/c blower resistor |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
A/C Not Blowing Cold Air...among other things | yarisitis | DIY / Maintenance / Service | 38 | 07-28-2016 04:00 PM |
DIY: Unlink A/C from Defroster | stran | DIY / Maintenance / Service | 46 | 01-19-2015 09:17 PM |
Easy Defrost A/c running fix | billk | General Yaris / Vitz Discussion | 14 | 01-16-2009 08:53 PM |
A/c blower motor noise!!!! | LBdriver | General Yaris / Vitz Discussion | 28 | 09-12-2007 07:46 AM |
A/C blower | flighttekchris | DIY / Maintenance / Service | 5 | 08-25-2007 11:42 AM |