Hi my dryer works. It has heat but will not fill the waste water tank. I have had a few issues with the empty water light recently and have had to empty the grey tank with the float at the back of the machine. I have blown down the black tube that goes to the water tank and can only think that the issue is that the pump has malfunctioned. It does not appear to make any noise not sure that it usually does make a noise if it does work. How can I tell? Can I fit a new pump myself? Is it easy where can I get instructions? Thank YOu ! anna