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Heater Fan Problem
http://auszookers.com/forum/viewtopic.php?f=5&t=48994		 Page 1 of 1
Author:  jme [ Tue Jan 13, 2015 6:57 pm ]
Post subject:  Heater Fan Problem
The heater fan in my SV420 Vitara only works on speeds 3 and 4, on 1 and 2 it does nothing at all. I presume that the motor is OK because it works in 3 and 4, does that mean I need a new fan speed switch?
Author:  DC3PTIKON [ Tue Jan 13, 2015 7:03 pm ]
Post subject:  Re: Heater Fan Problem
With the A/C button turned on, does A/C condenser fan turn on and compressor clutch engage when on speeds 1 & 2? If so check your fan resistor block. If not, its the fan switch.
Author:  jme [ Tue Jan 13, 2015 7:27 pm ]
Post subject:  Re: Heater Fan Problem
I don't think the A/C works on speed 1 and 2, but I'm not sure as the A/C isn't working at the moment. I guess I'd better fix the A/C...
Author:  losfer [ Tue Jan 13, 2015 7:29 pm ]
Post subject:  Re: Heater Fan Problem
Id put my money on the resistor and not the switch.
Author:  DC3PTIKON [ Tue Jan 13, 2015 7:32 pm ]
Post subject:  Re: Heater Fan Problem
You can still just rip out the resistor block and check with a multimeter if any of the resistors have an open circuit. 9 times out of 10 it's the block. Easy fix.
Author:  jme [ Wed Jan 14, 2015 8:37 pm ]
Post subject:  Re: Heater Fan Problem
How hard is it to replace the resistor block?
Author:  atari4x4 [ Wed Jan 14, 2015 9:18 pm ]
Post subject:  Re: Heater Fan Problem
a/c works on all speeds bar the off position.
Author:  DC3PTIKON [ Thu Jan 15, 2015 9:37 am ]
Post subject:  Re: Heater Fan Problem
With the ignition on/engine off, if the A/C condenser fan and compressor can be heard on speeds 1 and 2 (as well as the good fan speeds of 3 & 4), the resistor block is faulty. If they don't, then the switch is faulty. The A/C condenser fan and compressor wont energise as they wont get a signal from the faulty fan speed switch in positions 1 & 2.

Hope this makes sense :D

The block needs to be kept cool, so it will be in the blower fan housing, underneath or behind the glovebox in its ducting somewhere. I can check mine later to see the location exactly.
Author:  DC3PTIKON [ Thu Jan 15, 2015 10:01 am ]
Post subject:  Re: Heater Fan Problem
Just had a quick look, well more of a fell really! The block seems to be between the firewall and the blower fan. If you reach up behind the fan from the passengers side footwell, you should feel some wires attaching to something held in by screws in the blower fan housing. That should be it, I didn't have a mirror to check as I need to head off to work. Looks like you just need to drop the fan housing to access, which doesn't look too bad. Then test the block for an open circuit on each resistor. Hope this helps!
Author:  atari4x4 [ Thu Jan 15, 2015 10:21 am ]
Post subject:  Re: Heater Fan Problem
^^^ this guy, you'll do well here! Armsup
Author:  DC3PTIKON [ Thu Jan 15, 2015 1:47 pm ]
Post subject:  Re: Heater Fan Problem
Ha, cheers Mate!
I feel like I have been given the key to the AZ Forum with that coming from you! pompoms
Author:  atari4x4 [ Thu Jan 15, 2015 2:33 pm ]
Post subject:  Re: Heater Fan Problem
FKNLOL, cheers... I think. :thefinger: :oops:
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