Re: hotpoint wmud 963 Error Code: F18
F18 is a communications error so if you are very, VERY lucky it could just be a loose connection between the main power pcb in the base and the console pcb.
If not then the main pcb is likely to be at fault, part number is C00296189, list price is £140.50 unprogrammed.
To programme it yourself you will need a £19.00 smart card and a £145.00 smart card reader. 🙁
Cost wise the best option is to send it off to EMW Electronics. 😉