I am having issues with both the furnace and water heater not firing on my 2018 Aria 3901. Problem just started. I have ignition tries in both but gas valve not opening. I did get the WH to fire by turning off shore power & house batteries for 10 minutes. I turned house batteries back on and got the WH to fire, but it shut off as soon as I turned on the shore power. I have had issues with the combo CO/propane detector showing a fault. Is there any connection from the detector that won’t let the gas valve open. Thanks for any help
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