my hoover hnf3157 machine spins briefly after a wash ?

my hoover hnf3157 machine spins briefly after a wash leaving the clothes still sodden. When it goes to a high speed spin it lasts about 5 to 20 seconds then stops. I have to do a separate spin to finish the wash. The filter and all the pipes are clean and the pump does seem to get rid of the water. I can hear the water empty in the drain. I have also checked the pressure hose is clear.