Customer had a Rinnai tankless unit that was reading code 12. Code happens intermittently, but most often happens later in the day when the primary shower is run. Ran combinations of tubs and showers and was unable to recreate the code. Went to check the rating plate on the gas meter and it has been painted over so was unable to check the btu load. Inh20 reading was in normal range at 7.5 when static and 6.5 when heaters were firing. Need to be able to run the pool heater 8n conjunction with the heaters to ensure it doesn’t drop below 4 inh20 reading for proper function. Remote start for the pool heater wasn’t working and the screen was too pixelated to see the messages for the beeping. Informed customer the pool heater needs to be able to heat and AGL should check their meter and regulator to ensure proper function. After this, we can return to do a check on the gas pressure system.
