I have a new hoover washing machine that has been working properly till yesterday when it started to switch off after 3-4 seconds of initiating ( it switches off totally)

SOURCE: Hoover 2305 washine machine wont spin

Your problem could be caused the interlock but it could also be that the machine is failing to drain in the time alllowed and therefore the machine will not spin, before buying a lock check the sump hose and pump area for blockages.

SOURCE: Hoover 1300 washing machine

any reason why my hoover 1300 washing machine is so noisy when doing the final spin?

SOURCE: How can I fix my Hoover Washing Machine, model H130E?

which light?

SOURCE: error code e04 on hoover washing machine

called hoover and they replaced the washing machine

SOURCE: Hoover washer/dryer VHW854D SHOWS ERROR

I have exactly the same problem. Hoover Service Centre told me to tip a bucket of warm water into the drum and leave for 5 minutes before switching it back on. The idea is that the machine may be affected by the cold weather. Needless to say it made no difference and Error 11 remains - I am expecting an engineer on Thursday 23 I'll keep you posted on the outcome.