Got a greenheck m#VSU MAU that fails to light intermitantly. Have done everything suggested by manufactures, no help. Now suggest to convert to 120v ignition at xxxx dollars just for parts. Existing fenwal ignition system,amplifier,maxitrol mod valve,& honeywell main valve. Have verified gas press.,press. drop across burn,adjust low fire bypass on maxitrol. Guess my question is is there something I might be missing that somone else might catch or suggest to resolve problem without spending xxxx $ in just parts and end up with same problem afterward?