|Rover 800 820 825 827 Climate Control Fan crossbeam?|
Car: 1999 Rover 800 825 V6 Coupe
Colour: Zircon Silver
Every now and again all Rover 800's fitted with air conditioning will develop a small ever increasing whirring noise from the dashboard in the location of the electronic control panel for the climate control.
Automatic Climate control differs from normal air conditioning in that rather than just being switched on and off manually and the speed controlled by the normal fan/blowers, automatic climate control will maintain a specific temperature within the cabin and it will also alter how the air is circulated as and when necessary (although this can be overridden at any time, for extra demisting of the front windscreen etc.).
To work correctly, the climate control must take a constant sampling of the current air temperature within the passenger compartment. This is done by a small fan constantly sucking air past a temperature sensor. This small fan is located behind the vents to the side of the climate control, control buttons/panel.
The fan draws air into the unit, the trouble is this area is usually overlooked when it come to interior car care/cleaning. The resultant build up of dust will eventually have an effect on the fan, causing it to become more and more noisier.
The solution is very simple and does not usually require any replacement parts. Just remove the front panel and then with some cotton buds, tweezers, or even a vacuum cleaner, just remove as much as the dust as you can. This should then restore the fan back to it's normal 'silent' running mode.
You may wish to add a drop of lubricant, and that will not do it any harm and may also be of help for any louder or squealing fans.
Just be careful, not to damage the temperature sensor.
If you get any mystery noises from the dashboard, they may be coming from this small vent located by the side of the automatic climate control control panel.
Lever the trim away from the bottom and it will come off very easily.
Inside you will see a temperature sensor and behind it is a small fan, they will both usually be covered in dust (and most probably a lot worse than shown here!).
Make sure the ignition is switched off before you make any attempt to clean the sensor and fan.
You could use some ordinary cotton buds and tweezers, but in this case I just vacuumed it out, when I was vacuuming the car anyway, so very little extra effort was required.
A normal vacuum cleaner nozzle is far to large to clean something like this, so I just tape a drinking straw into the end of the normal nozzle to achieve a much smaller nozzle that fits.
(If you try this, do not use the vacuum like this for very long, as it may cause a strain on your vacuum causing it to overheat).
A minute or two later and it's looking much cleaner. With the ignition now switched on, the fan is spinning away again silently as it should.
Then just pop the cover back in place. Easy.