OK this is a stumper and $50 to the first guy who can diagnose! Bought a Marey model 23LP about 2 years ago. Bought the accompanying vent kit with it. Sat in a box for all this time, which i was told was fine. had it professionally installed by the gas company, professionally vented by a plumber, and plumbed by said plumber. Unit display reads140 degrees - exactly what the book says it should - no error codes. water is running thru it cuz I can hear/feel it, plus when I close the shutoff water ceases. So what's the problem? IT WONT IGNITE!. i know it's getting gas, cuz tank has plenty and when dirt leg was unscrewed i smelled it, plus furnace runs. water is going in AND out, and it's vented. the exhaust blower won't even turn on, although it turns with no problem. i didn't install the pressure relief valve, but my dad's doesn't have one and his works (albeit his is a different brand.) So - KILLER water pressure, plenty o' gas, good venting, no error codes, troubleshooting was fruitless, all electrical connections are right/tight, tapped on ignitor and transformer or whatever it is (hey - it works on cars when you tap the coil!) I don't get it. Ideas? Again, it runs, you get a check in the mail for a cool $50 JIM, 218-566-1135 home, 218-256-1135 cell