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Heater Fan Problem

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jme

Joined: Tue Jan 07, 2014 5:57 pm
Posts: 32
Vehicle: Suzuki

Posted: Tue Jan 13, 2015 6:57 pm

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?

DC3PTIKON

Joined: Fri Nov 28, 2014 3:16 pm
Posts: 149
Vehicle: Vitara SV420

Posted: Tue Jan 13, 2015 7:03 pm

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.

jme

Joined: Tue Jan 07, 2014 5:57 pm
Posts: 32
Vehicle: Suzuki

Posted: Tue Jan 13, 2015 7:27 pm

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...

losfer

az supporter

Joined: Fri Mar 30, 2007 11:30 pm
Posts: 977

Posted: Tue Jan 13, 2015 7:29 pm

Id put my money on the resistor and not the switch.

DC3PTIKON

Joined: Fri Nov 28, 2014 3:16 pm
Posts: 149
Vehicle: Vitara SV420

Posted: Tue Jan 13, 2015 7:32 pm

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.

jme

Joined: Tue Jan 07, 2014 5:57 pm
Posts: 32
Vehicle: Suzuki

Posted: Wed Jan 14, 2015 8:37 pm

How hard is it to replace the resistor block?

atari4x4

az supporter

Joined: Mon Dec 11, 2006 10:30 pm
Posts: 34842
Location: East Radelayed
Vehicle: SV420+SV620 Vitara's

Posted: Wed Jan 14, 2015 9:18 pm

a/c works on all speeds bar the off position.

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DC3PTIKON

Joined: Fri Nov 28, 2014 3:16 pm
Posts: 149
Vehicle: Vitara SV420

Posted: Thu Jan 15, 2015 9:37 am

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

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.

DC3PTIKON

Joined: Fri Nov 28, 2014 3:16 pm
Posts: 149
Vehicle: Vitara SV420

Posted: Thu Jan 15, 2015 10:01 am

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!

atari4x4

az supporter

Joined: Mon Dec 11, 2006 10:30 pm
Posts: 34842
Location: East Radelayed
Vehicle: SV420+SV620 Vitara's

Posted: Thu Jan 15, 2015 10:21 am

^^^ this guy, you'll do well here! Armsup

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DC3PTIKON

Joined: Fri Nov 28, 2014 3:16 pm
Posts: 149
Vehicle: Vitara SV420

Posted: Thu Jan 15, 2015 1:47 pm

Ha, cheers Mate!
I feel like I have been given the key to the AZ Forum with that coming from you! pompoms

atari4x4

az supporter

Joined: Mon Dec 11, 2006 10:30 pm
Posts: 34842
Location: East Radelayed
Vehicle: SV420+SV620 Vitara's

Posted: Thu Jan 15, 2015 2:33 pm

FKNLOL, cheers... I think. :thefinger:

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