We used to do electrical work for a kitchen install firm, there job was to go and put right the work when people complained to b+q, as b+q would not get the original people back who done it.
Most of our work though was where they did NOT put a new board in, when it was needed and just spurred and bodged it all.
When we had to rip out all the units and tiles to redo the kitchen and then expect to go upstairs to test the circuits,after fitting the board and then finding numerous faults elsewhere in the house , the owners would then get funny with us.
One house had no earth wires to all her brass fittings , hardly any earth coming into the building causing too high readings throughout, reverse polarity sockets, all on the upstairs.
To which the owner said, what has that got to do with the kitchen and thought we were trying it on.
Although they were all bad installs, there was proberly also thousands of instals that were ok that we did not hear about.
B+q did help these out, so I would expect ikea to be similar