If it's a rented property then it's the responsibility of the landlord.
If you own the dishwasher then you can do as you please - mend it yourself - have someone else mend it or even buy a new one.
If you attempt to repair the landlord's machine you could be held liable for the cost of any subsequent repair job.
Ask the landlord's advice before messing around with it.
Peccavi
July 2013