Thanks for getting back with info! I looked up on the net about pressure switch and they also gave another bit of info that's not really for that code but might be the outlet pipe? Anyway I pulled the machine out and put the outlet in the sink. Now I know it's pretty risky like getting my kitchen flooded lol but it is working at the moment!
If it finishes I will check the soil pipe to see if it's blocked and if I find a solution to the problem I will post it so it may help someone else.