Post
by htg engineer »
Mon Apr 21, 2008 8:15 am
The fan rotates a few times - the fan may be stuck or struggling, is there power to fan when it is still ?
If there is power there but the fan is not going - the fan needs replacing.
The fan also needs to operate a air pressure switch, if the fan speed is insufficient a replacement fan is needed - but it could also be the air pressure switch at fault.
Hope this helps