I bought a Houghton air conditioner. But the air blower would not cut off when the compressor cut off. So, grandson installed a relay to make that happen. I used the AC one time and all was well, but this camping trip the compressor would not come on (just the fan). I had a local camper repair man come and he said the relay is burned up. I have another relay, but do not want to install it without knowing why the first relay failed. Has anyone had this happen?? Thanks so much!