He came out was very thorough checking all sorts of areas that could cause the problem we were discribing to him. He listened to us assured us we weren't crazy and that there was a problem. He found the problem and fixed it. So far it is working nicely and no loud whooshing sound like a lit match catching to gas. Of course it took a few visits but the problem was found. The loud sound wasn't constant it came and went so naturally it worked fine for repairmans visit. But with persistent and determination he found it. Thanks for not giving up
