Heater fan - can it turn off-off?
Discussion
I've been having a play with my heater recently after discovering that hot was cold and vice versa when turning the knob on the dash and have searched and found the solution to that problem in the forums.
What I can't seem to find is whether it should be possible to turn the heater fan off properly? I've seen lots of posts about various other heater problems but not this one. One post was about not being able to turn the fan on which was cured by pressing the button for the mirror heaters, and several were to do with a humming noise in the dashboard.
I too have the loudish bassy hum from the NS of the dashboard (not one of the control motors), but I can't seem to determine where it comes from. My heater fan will not completely stop, even with the switch turned to stop or by pressing the switch in. I've also noticed that the fan speed doesn't get any faster after about 80% of the knob's rotation. Is this a simple case of a slipped pot or something or should I not be able to stop the fan running altogether? Its kind of annoying as at low speed the fan makes a bit of noise like its got some kind of leaves in it or something.
Any help gratefully received!
What I can't seem to find is whether it should be possible to turn the heater fan off properly? I've seen lots of posts about various other heater problems but not this one. One post was about not being able to turn the fan on which was cured by pressing the button for the mirror heaters, and several were to do with a humming noise in the dashboard.
I too have the loudish bassy hum from the NS of the dashboard (not one of the control motors), but I can't seem to determine where it comes from. My heater fan will not completely stop, even with the switch turned to stop or by pressing the switch in. I've also noticed that the fan speed doesn't get any faster after about 80% of the knob's rotation. Is this a simple case of a slipped pot or something or should I not be able to stop the fan running altogether? Its kind of annoying as at low speed the fan makes a bit of noise like its got some kind of leaves in it or something.
Any help gratefully received!
On mine the fan turns on and off completely by pressing the switch, which I think is what is suppose to happen. It dose get noisy though as the speed is turned up. Once off it is silent (but you can only tell this when the engines not running). Each time the fan is switched on the mirrors heater timer is stared again I think this is normal.
I do however have a problem with the heater controls and sometimes when cold and damp the valve operates by itself making a noise. I have read that this can be fixed by routing the power feed through the push switch so that when not adjusting the heater controls the valve is isolated. Haven’t done this yet though.
Cheers,
Simon.
I do however have a problem with the heater controls and sometimes when cold and damp the valve operates by itself making a noise. I have read that this can be fixed by routing the power feed through the push switch so that when not adjusting the heater controls the valve is isolated. Haven’t done this yet though.
Cheers,
Simon.
What year is your Griff?
I believe that some of the earlier ones ('94 and earlier?) had a second blower motor in the offside wing, with a switch somewhere beneath the steering wheel. I wonder whether you may have such a car and that the noise you hear on the nearside is being transmitted via the air ducting tube.
I have assumed that you hear the noise when stationary with only the ignition on, rather than when driving.
I believe that some of the earlier ones ('94 and earlier?) had a second blower motor in the offside wing, with a switch somewhere beneath the steering wheel. I wonder whether you may have such a car and that the noise you hear on the nearside is being transmitted via the air ducting tube.
I have assumed that you hear the noise when stationary with only the ignition on, rather than when driving.
DarkMatter said:
What year is your Griff?
I believe that some of the earlier ones ('94 and earlier?) had a second blower motor in the offside wing, with a switch somewhere beneath the steering wheel. I wonder whether you may have such a car and that the noise you hear on the nearside is being transmitted via the air ducting tube.
I have assumed that you hear the noise when stationary with only the ignition on, rather than when driving.
I believe that some of the earlier ones ('94 and earlier?) had a second blower motor in the offside wing, with a switch somewhere beneath the steering wheel. I wonder whether you may have such a car and that the noise you hear on the nearside is being transmitted via the air ducting tube.
I have assumed that you hear the noise when stationary with only the ignition on, rather than when driving.
My car is a 95 and I do have the second fan for the driver's side. That works fine and is definitely switched off and not creating any noise. The hum appears to be quite common looking through the archives, all those affected appear to be similar age to mine? Perhaps its a bit of special 95 "character"?!
I only hear it with the engine off, if I could hear it with the engine on an exaust mod would definitely be required
Might go and try the button again now, just in case....
[Superembarassed mode] Errr, how about we forget all about this thread eh? Seems that pressing the button really does work
[/Superembarassed mode] Edited by griffit on Tuesday 6th March 14:25
griffit said:
DarkMatter said:
What year is your Griff?
I believe that some of the earlier ones ('94 and earlier?) had a second blower motor in the offside wing, with a switch somewhere beneath the steering wheel. I wonder whether you may have such a car and that the noise you hear on the nearside is being transmitted via the air ducting tube.
I have assumed that you hear the noise when stationary with only the ignition on, rather than when driving.
I believe that some of the earlier ones ('94 and earlier?) had a second blower motor in the offside wing, with a switch somewhere beneath the steering wheel. I wonder whether you may have such a car and that the noise you hear on the nearside is being transmitted via the air ducting tube.
I have assumed that you hear the noise when stationary with only the ignition on, rather than when driving.
My car is a 95 and I do have the second fan for the driver's side. That works fine and is definitely switched off and not creating any noise. The hum appears to be quite common looking through the archives, all those affected appear to be similar age to mine? Perhaps its a bit of special 95 "character"?!
I only hear it with the engine off, if I could hear it with the engine on an exaust mod would definitely be required
Might go and try the button again now, just in case....
[Superembarassed mode] Errr, how about we forget all about this thread eh? Seems that pressing the button really does work
[/Superembarassed mode] Edited by griffit on Tuesday 6th March 14:25
My 1996 Griff has the hum from the fans - like a very loud version of the dreaded 50Hz hum that sometimes plagues hi-fi set ups (and in the case of hi-fi is normally dealt with by removing earths from all but the amp - though not entirely recommended).
In my case the hum seems louder when the fan is at the slow setting, decreasing in volume as the fan speed increases (but then supplemented by the fans own sound).
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