Only just joined, so didn't see previous posts.
It certainly is either a problem with your pressure switch or pressure switch hose.
Normally I would advise to remove the hose completely and pour some very hot water down it (careful not to scald yourself) and give the tube a good bang to...
The pulley may have ridden up worm.
If this is the case it will stick ad rotate whole assembly.
Wind down pulley on worm and grease so it doesn't get stuck.
I have a Collins DIY book which states that any elec cooker under 3kw can go on a plug top.
We are looking to buy a dual fuel cooker.
Main elec oven 1.7kw
Top oven 1.3kw
Gas hobs.
This totals 3kw. However, the manufacturers state that a cooker connection at 30A is required.
Any ideas ?