Arrived onsite to customer having a tankless rannia unit installed for 12 years. Tankless was unplugged and gas was shut off to unit upon arrival as customer had had concerns about leaking gas. Customer had stated they didn’t smell gas but they didn’t necessarily. Attempt to diagnose issue with 12 year old Rannia Tankless. Tankless is t having spuratic issues with no codes visible by customer. Customer accepted diagnostic pricing. Checked inlet gas pressure. Gas pressure was 6.9 inches of water column. Outlet of gas valve gas pressure was measured at 1.98” of W.C. No ignition was present while water was running. Checked voltage on Ignitor and found it to have 69VAC flashing consist,y. Called tech support and informed them of findings. John at Tech support asked me to confirm 120VAC Present to the ignition control module via molex Plug. Tested and found that when water was ran 120VAC was present to the ignition module. Tech support stated that it was a faulty ignitio