Okay Guys my heater is back in business! Behind the temperature control dial on the front of the Unitrol is a lock nut and a stopper on the shaft that was out of adjustment. I adjusted it so it click in and out at the "70" marked on the valve. I cleaned the jets and put it together and sure enough it fired. Thank you everybody for your help. As I was running it it didn' seem to be as hot as it used to be, I wonder if the new regulator was more restrictive than the original one that came with it. Any thoughts on that? Does it use a higher volume regulator?