electrical, is 13.4 volts normal?
I recently had the motor in my furnace replaced by an extremely experienced RV appliance guy. When I put the furnace back in it never ran right. The fan sounded weak. But it was putting out heat so...
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A fully charged 12v battery will be 12.8 or 12.9+ Vdc. If you have 2 12v batteries in series then you would have 24v which would melt the brushes, I am assuming you have them in parallel. (+,+) (-,-) 13.4v is normal to the furnace with the inverter running charging the batteries. My control panel normally reads 13.4v in charge mode for my trailer.
