|
|
|
|
Thread Tools | Display Modes |
09-05-2019, 04:12 PM | #1 |
Scooby Newbie
Member#: 438329
Join Date: Jan 2016
Location: Fresno, CA
Vehicle:2016 Impreza Sp Ltd Dark Gray Metallic |
2016 impreza sport hvac blower intermittently dying
So my current issue is that when turning on the fan to any speed, sometimes it blows air and sometimes it does nothing. There are even times it will be blowing then turn off all of a sudden and come back on whenever it wants to.
I do hear a click in the passenger footwell when I turn the fan speed dial between off and auto which im assuming is the relay. There are no issues with the ac/cooling system as I can crack open the sunroof and set the ac to outside air with the dial to full cold and it almost feels like the system is working normal. But with recirc mode there is no air movement at times. I can only think of changing the relay and then the blower motor if that doesn't help. Any other things to look in to? Thanks for any info.
* Registered users of the site do not see these ads.
|
09-05-2019, 07:07 PM | #2 |
Scooby Guru
Member#: 53443
Join Date: Jan 2004
Location: Anchorage, AK
Vehicle:2001 LL Bean Outback Winestone |
Swapping the relay is a logical first step for the trouble. You may even be able to swap it with another one in the car to see if that it the cause of the trouble. Try to check for voltage getting to the motor. The relay is usually on the hot side of the circuit and the speed control is usually on the return side of the circuit.
|
09-05-2019, 08:01 PM | #3 |
Scooby Newbie
Member#: 505921
Join Date: Sep 2019
Chapter/Region:
NESIC
Location: Boston
Vehicle:2007 Impreza 2.5i Black |
Have you tried the blower motor resistor? Usually the first sign of this going is the fan speeds intermittently working. I had a Sebring that this was happening to and a quick resistor replacement fixed it perfectly.
|
09-06-2019, 01:55 AM | #4 |
Scooby Newbie
Member#: 438329
Join Date: Jan 2016
Location: Fresno, CA
Vehicle:2016 Impreza Sp Ltd Dark Gray Metallic |
I'll have to research that. I've never heard of that part before. Would that require disassembly of the blower itself?
|
09-06-2019, 05:16 AM | #5 |
Scooby Guru
Member#: 53443
Join Date: Jan 2004
Location: Anchorage, AK
Vehicle:2001 LL Bean Outback Winestone |
Blowers that have several speed selections use resistors in series with the motor to make the motor speed slow down to certain speeds. When the blower is on high speed then the motor is tied directly to the full power source to generate the highest air flow. There is another design type of speed controller that is a variable speed, and it uses a solid state controller in the same way to control the speed of the motor.
|
09-13-2019, 02:36 AM | #6 |
Scooby Newbie
Member#: 438329
Join Date: Jan 2016
Location: Fresno, CA
Vehicle:2016 Impreza Sp Ltd Dark Gray Metallic |
Update part 1
So I checked the voltage from the relay going to the blower motor. No matter what the fan speed setting (auto/low/high), the voltage stays at 1.9-2.0 volts. Is that enough voltage to the blower? It does go to 0 volts when I turn off the fan speed.
|
09-16-2019, 07:54 PM | #7 |
Scooby Specialist
Member#: 89967
Join Date: Jun 2005
Chapter/Region:
NESIC
Location: MA
Vehicle:2020 Volvo S60 Gray |
I had an issue with my blower on my '12 Impreza, it would only turn on full blast or nothing at all. It was the resistor that sits by the blower. There should be a thread in the impreza forum that I posted my process
|
09-18-2019, 12:20 AM | #8 |
Scooby Newbie
Member#: 3409
Join Date: Jan 2001
Chapter/Region:
NWIC
Location: Oly
Vehicle:98 My FMIC Is bigger than yours. |
Without looking at a schematic, I am betting it's the electrical plug that goes into the back of the HVAC control head. It's probably melting.
I believe if you have an "auto" climate control system, you don't have a blower resister but rather a solid state thingamajiggy. |
Thread Tools | |
Display Modes | |
|
|