Arrived on site to investigate a no-heat issue on a Viessmann propane boiler. The boiler was displaying error code E8, indicating that the ionization current was outside the permissible range. According to the manufacturer’s manual, this error points to the ionization electrode. I performed an annual tune-up last month and replaced the inducer fan last Friday. During the tune-up, the ionization electrode was cleaned and appeared to be in good condition. While troubleshooting, I inspected the wiring and found the connection to the ionization electrode was loose. I tightened the connection and reset the boiler three times. The system is operating properly at this time. If this issue reoccurs, I recommend replacing the ionization electrode and wire. Due to the fact that I disconnected the ionization electrode twice in the last month, this visit is covered under Jerm’s warranty.
