Hoover Jet and Wash 1500w S6254 001

Question

Hoover Jet and Wash 1500w S6254 001. Used once with great difficulty as assembly and use instructions are hard to follow.Now will not work as carpet shampooer at all, although assembly is correct as far as I can see and both motor and pump appear to be working and I am using the recommended cleaning fluid.Hoover website is no use at all in solving the problem.No cleaning fluid is being drawn up from the tank in to the cleaning fluid hose.There is suction from the suction hose so the problem appears to be at the pump end but pump swith lights up and you can hear it working. I've cleaned all of the bits that I can reach to clean.Please can someone help!?