Notices

2010 impreza hatch, heater blower issue

Old 18 February 2019, 12:47 PM
  #1  
HippyDib
Scooby Newbie
Thread Starter
 
Join Date: Dec 2018
Location: Farnborough
Posts: 7
Default 2010 impreza hatch, heater blower issue

I am having a rather annoying issue with my heater blower. It stopped working completely so I changed the fan speed controller and it all came back to life. On testing the faulty unit I found the output transistor to be blown. After a few days the replacement unit died the same death and again found the output transistor to be blown.

I replaced the output transistor with a higher rated component as the original fitment is now an obsolete part and even then it has died 5 days after fitting it.
Does any one know of any other issues that could be causing the units to blow the transistor?. The relay can be heard to click in but no life from the fan. I am now stuck and its not the easiest part to get in and out as it is buried far back behind the dash.
I would be very grateful if any of you guys have come across this issue and could shed any light.

Thanks
HippyDib is offline  
Old 18 February 2019, 01:49 PM
  #2  
Don Clark
Scooby Regular
 
Don Clark's Avatar
 
Join Date: Feb 2003
Location: Harpenden
Posts: 4,832
Default

Assuming vehicle in question is petrol powered with auto A/C

If the power transistor keeps blowing, I would suspect the blower motor is the problem or possibly a problem with the A/C control panel.

Here are the relative sections of the MY10 Impreza Auto A/C system wiring diagrams






Not sure these will be any use at this juncture but does list the fan voltages for each switch setting
A/C Diagnostics pdf
Don Clark is offline  
Old 18 February 2019, 04:46 PM
  #3  
HippyDib
Scooby Newbie
Thread Starter
 
Join Date: Dec 2018
Location: Farnborough
Posts: 7
Cool

Hello Don thanks for the great information. I will first remove the blower motor and check that out for current draw and bearing smoothness as it was very dusty and the previous owner had no idea of what a cabin filter is judging by the crap that was on it when I changed it.

Thanks again for the great info Don. when I have had some results I will post back just in case people are having the same issue
HippyDib is offline  
Old 25 February 2019, 09:13 AM
  #4  
HippyDib
Scooby Newbie
Thread Starter
 
Join Date: Dec 2018
Location: Farnborough
Posts: 7
Default

Ok problem solved. well touch wood everything still works. Turns out the current draw from the motor was very irregular but on inspecting the motor brushes they were fine. The problem was the crimps in the power connector for the blower had oxidised quite badle and had slightly spread. So I chopped them out and fitted new spades and hey presto smooth current and working well. Thanks again for the wiring information Don.
HippyDib is offline  
Old 25 February 2019, 09:54 AM
  #5  
Rusti
Scooby Regular
iTrader: (3)
 
Rusti's Avatar
 
Join Date: Sep 2014
Location: Hampshire
Posts: 887
Default

Glad to hear that it's fixed.
Rusti is offline  
Old 25 February 2019, 11:07 AM
  #6  
HippyDib
Scooby Newbie
Thread Starter
 
Join Date: Dec 2018
Location: Farnborough
Posts: 7
Default

So far its worked so i am a happy bunny and in the same day got the steering wheel controls working with the chinese android stereo so a successful (be it minor stuff) kind of day 😁
HippyDib is offline  
Old 25 February 2019, 02:25 PM
  #7  
Don Clark
Scooby Regular
 
Don Clark's Avatar
 
Join Date: Feb 2003
Location: Harpenden
Posts: 4,832
Default

Don Clark is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
jeff121
General Technical
16
29 July 2013 02:12 PM
MchlTR1CKY
General Technical
5
19 June 2004 10:07 PM
LeighJ
General Technical
4
21 December 2003 05:23 PM
ski
General Technical
2
14 February 2003 07:26 PM
stephen emery
General Technical
5
01 March 1999 01:49 AM


Thread Tools
Search this Thread
Quick Reply: 2010 impreza hatch, heater blower issue


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.