Since it is a used unit the causation can be more troublesome . You have pretty well checked , cleaned or replaced the normal areas of concern . The ignition switch may be faulty as you have indicated which can be bypassed . Secondarily and more likely is that your coil is heating up and breaking down . They are inexpensive on eBay . I would also advise since it is used to ensure your fuel filter and air filter and gas cap vent are clean and check the cylinder and headbolts are tight roy- bilt and ryobi have fastener issues Good luck Bud !

We liked the LG & Samsung too. I liked the Samsung interior setup the best, but I wasn't wild about the tubular handles. Then we found out that there was another version of that fridge--with Kenmore Elite badging. Sure enough, its the same exact fridge, just with different handles and a different brand badge. We've been thrilled with it. Plenty of freezer space (frozen pizza, chicken breasts, hamburger, veggies, rolls, ice cream, etc. It all fits! Love the fridge layout especially with the pull down rack on the door and the wine rack in the fridge (we use it for bottled drinks). I have never had veggies stay so fresh so long--it's amazing! Anyway, very happy with ours. Sears will usually run sales all summer especially at holidays and with Kenmore items you typically get a a greater percentage off their brands vs. the name brand version. There are several different models right now with the Kenmore Elite badging--Samsung, LG & Whirlpool are the manufacturers. Hope this helps! Here is a link that might be useful: Kenmore Elite Badged Samsung

I also installed this heater about a month ago and had all the same problems and was just about ready to get rid of it when a gas man that knew his stuff came along. It took him only a few minutes to fix. All he did was increase the gas pressure. My heater now stays on and no longer cycles. It ignites much quicker and I no longer get the gas smell. The only thing that bothers me is that several people seem to be having the same problem so the setting must not have been done properly at Hayward factory and they won't pay the gas guy so the customer gets stuck with the bill($200+ in my case) as they say "not under warranty". Thanks a lot Hayward. I know that I won't forget this experience next time I need a new piece of pool equipment.

Did you look at the owner''s manual and try to troubleshoot the issue? You can also do a google search of the problem using the brand and model of dishwasher. If it is a fairly new dishwasher you may wish to look into fixing it.