Whirlpool 60cm Maxi-Tub WDFS3R4N

Might be good product but support is limited – Great while it works. Has come up with the error F9 and E1 and that is quite common from what I can see. Followed the instructions and cleaned filter and wash-arm and still get the error. Followed Whirlpool website advise to descale a fairly new dishwasher and still get the same error. Called Whirlpool support and have to wait a week for a tech to come and look at it- not happy. We had ASKO previously and that had quicker tech support. Job No.CAS-49559-J9S7J4