I serviced a customers boiler about 2 months ago and to reach the boiler which was up high above washing machine, I supported myself off the ladders by putting my foot on the washing machine. I got called back, customer said "washing machine hasn't worked since I left" I immediately knew I must have been to blame, apologised and told her to get a quote for repair and phone me. She phoned me next day (on my rest day) to say the washing machine needed a pcb and would cost £400, I contacted my manager who reimbursed the customer all costs. Now this is what should happen when we get it wrong, were all human and mistakes do happen, if anyone on here states they have never cocked up, then I applaud them.