There was an in my Honda generator of less than 1 KVA Residential set, so I called this person.he came and checked and cleaned the plug.he was saying that many had to be replaced where it cost more .since I myself is a technician , I told them it can be done afterwards, initially the repair charge was 850, after coming to home, he demanded to 1100, after checking he demanded more.finally, I paid 1500 to him.had a bad experience from them