12 Volt Electrical issue?
To All: I am a new Motorhome owner. This is an older unit. Originally all components worked properly. Now I do not have power to the control panel to view how full the water and waste tanks are. I ...
Forum Discussion
Almost everything in the RV coach runs on 12VDC. Your lights and water pump run on 12 V. Your furnace runs on 12VDC.
This is true whether you are plugged into shore power (110VAC) or not.
Your refrigerator probably is able of running on 110VAC or propane, but on propane will probably require 12VDC. Your refrigerator might also run on 12VDC. Some are two-way (propane/110), some are three-way (propane/110/12).
Your microwave and air conditioning run only on 110VAC.
So. To see if your shore power is hooked up right, the first thing I do is try to run either the AC or the microwave. If those things work, you've got 110VAC.
Next try your 12VDC accessories while you are plugged into shore power. This takes the battery out of the picture. If your internal lights work, you've got 12VDC at least there. So I would suspect fuses first since clearly your converter is working.
If you find that on shore power all your 12VDC accessories work, but on battery only the lights work, it may be that your battery has enough power to power the lights but not other higher-load accessories.
Your furnace has a "sail switch" in it. Before the burner turns on the fan will come on and air will start blowing through the furnace. If this does not happen with enough force to activate the sail switch, the burner will not turn on and the furnace will shut down. This is to prevent the burner from overheating/catching fire if there is not enough air blowing through it to cool it off.
Steve
This is true whether you are plugged into shore power (110VAC) or not.
Your refrigerator probably is able of running on 110VAC or propane, but on propane will probably require 12VDC. Your refrigerator might also run on 12VDC. Some are two-way (propane/110), some are three-way (propane/110/12).
Your microwave and air conditioning run only on 110VAC.
So. To see if your shore power is hooked up right, the first thing I do is try to run either the AC or the microwave. If those things work, you've got 110VAC.
Next try your 12VDC accessories while you are plugged into shore power. This takes the battery out of the picture. If your internal lights work, you've got 12VDC at least there. So I would suspect fuses first since clearly your converter is working.
If you find that on shore power all your 12VDC accessories work, but on battery only the lights work, it may be that your battery has enough power to power the lights but not other higher-load accessories.
Your furnace has a "sail switch" in it. Before the burner turns on the fan will come on and air will start blowing through the furnace. If this does not happen with enough force to activate the sail switch, the burner will not turn on and the furnace will shut down. This is to prevent the burner from overheating/catching fire if there is not enough air blowing through it to cool it off.
Steve
