I need help, I am at a loss. I have a class c motorhome. My co alarm kept going off, so I bought a new one, new one shows levels from 30-150ppm. I am hooked to shore power and I have no fuel burning (motor is off, propane tank is closed) Where could the CO be coming from??
When I pull outside air from the bathroom vent and push air out the stove fan, co levels fall to 0 within minutes.