Our 73 stay on as long as it is being primed so you have keep priming it to keep it on, then turns off 1 min after we stop priming it either reads ee2 or ee6
This site http://livesupport.maybenow.com/Rinnai/Rinnai-Toyostove-Direct-Vent-Heater-Laser-30-pr254029 handles prime issues directly for the unit. I would recommend contacting an individual in person that can assist you with the prime issues. This is a very sensitive issues which is best handled by having the problem fixed in person and not via email, chat, phone. (Lots of Danger factors)
Answers & Comments
This site http://livesupport.maybenow.com/Rinnai/Rinnai-Toyostove-Direct-Vent-Heater-Laser-30-pr254029 handles prime issues directly for the unit. I would recommend contacting an individual in person that can assist you with the prime issues. This is a very sensitive issues which is best handled by having the problem fixed in person and not via email, chat, phone. (Lots of Danger factors)