Nut Kracker
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- Oct 18, 2012
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- Echuca Vic.
- Members Ride
- VT SS 304ci (195i)
Check fuse number F13
Welcome to Just Commodores, a site specifically designed for all people who share the same passion as yourself.
THIS "HOW TO" IS ONLY FOR THE MANUAL HVAC SYSTEM AND NOT FOR THE AUTOMATIC CLIMATE CONTROL.
I've been looking around this Forum and I have found that alot of responses as to why the HVAC
(Heating, Ventilation and Air Conditioning) fan is not working, is that the resistors have packed it in.
This is not entirely true.
The fan switch is divided into two parts. Firstly, the lower speeds, 1,2 and 3 run through the resistors to the fan. The 4th speed (High) by passes the resistors and runs directly to the fan via the blower relay. There is NO resistance on the 4th speed.
That means you can pull the fuse or remove the blower relay and the 1st, 2nd and 3rd speeds will still work.
If the fans don't work at all, it is very unlikely (however possible) that both the blower relay and the resistors have failed simultaneously.
It could be...
1) The Blower Inhibit Relay. This relay turns on when the car is started, regardless if the fan is switched on or not.
2) The Fan Switch.
3) The Fan Motor it's self.
4) The BCM.
5) Wiring faults (Shorts etc.).
6) The Blower Fusible Link/s
7) The Main Fusible Link. (That would mean NOTHING on the car would work). Hey, Don't laugh!
8) Fuses.
If only the first 3 speeds aren't working and the 4th speed IS, then yes, it could be is the resistors, the BCM, the fan switch is faulty or faulty wiring.
If only the 4th (High) speed isn't working, then the Blower relay may be faulty, The number 13 Blower Relay Fuse (7.5 amp) VT-VX or The number F22 Demister Fuse (20amp) VZ may be blown (The VZ F22 fuse protects both the Blower and Demistor Relay circuits),
again the fan switch and again faulty wiring.
The HVAC is not really a complicated circuit compared to other circuits on these cars. It's physically finding the fault as you all know is the problem. It's not as easy on more modern cars as it is on older ones. It's just a matter of "process of elimination". Start with the easiest solutions first and then work your way towards the harder ones.
Anyway, I hope this helps anyone with these problems and if there is anyone who can add to this, please do, as it's late and my brain is a bit fuzzy.
Hi I have a HOLDEN COMMODORE VX 3.8L Ecotec LN3/L36 OHV 12v MPFI V6 SERIES 1 4dr Wagon 4sp Auto RWD [10/00 - 07/01] need help with why the Aircon is not blowing hard enough through the vents, it's still blowing a bit of air on 1, 2, 3 and hi but not enough to feel in this 40+ heat up here. Its cold and I can here the blower which sounds a bit loud. Cheers.THIS "HOW TO" IS ONLY FOR THE MANUAL HVAC SYSTEM AND NOT FOR THE AUTOMATIC CLIMATE CONTROL.
I've been looking around this Forum and I have found that alot of responses as to why the HVAC
(Heating, Ventilation and Air Conditioning) fan is not working, is that the resistors have packed it in.
This is not entirely true.
The fan switch is divided into two parts. Firstly, the lower speeds, 1,2 and 3 run through the resistors to the fan. The 4th speed (High) by passes the resistors and runs directly to the fan via the blower relay. There is NO resistance on the 4th speed.
That means you can pull the fuse or remove the blower relay and the 1st, 2nd and 3rd speeds will still work.
If the fans don't work at all, it is very unlikely (however possible) that both the blower relay and the resistors have failed simultaneously.
It could be...
1) The Blower Inhibit Relay. This relay turns on when the car is started, regardless if the fan is switched on or not.
2) The Fan Switch.
3) The Fan Motor it's self.
4) The BCM.
5) Wiring faults (Shorts etc.).
6) The Blower Fusible Link/s
7) The Main Fusible Link. (That would mean NOTHING on the car would work). Hey, Don't laugh!
8) Fuses.
If only the first 3 speeds aren't working and the 4th speed IS, then yes, it could be is the resistors, the BCM, the fan switch is faulty or faulty wiring.
If only the 4th (High) speed isn't working, then the Blower relay may be faulty, The number 13 Blower Relay Fuse (7.5 amp) VT-VX or The number F22 Demister Fuse (20amp) VZ may be blown (The VZ F22 fuse protects both the Blower and Demistor Relay circuits),
again the fan switch and again faulty wiring.
The HVAC is not really a complicated circuit compared to other circuits on these cars. It's physically finding the fault as you all know is the problem. It's not as easy on more modern cars as it is on older ones. It's just a matter of "process of elimination". Start with the easiest solutions first and then work your way towards the harder ones.
Anyway, I hope this helps anyone with these problems and if there is anyone who can add to this, please do, as it's late and my brain is a bit fuzzy.